{"title":"Tube Power Amplifiers","description":"\u003cp\u003eA tube power amplifier drives your speakers from a vacuum-tube output stage, trading the raw damping factor of solid-state for the harmonic bloom, midrange presence, and natural decay that valve designs are prized for. Paired with a capable preamplifier, a tube power amp is the heart of a separates system, and monoblock versions take it further by giving each channel its own chassis and power supply. This collection holds all-tube stereo amplifiers and monoblocks from Rogue Audio, built in Pennsylvania, and Unison Research of Italy.\u003c\/p\u003e\u003cp\u003eRogue's \u003ca href=\"\/products\/rogue-audio-atlas-magnum-iii-power-amplifier\"\u003eAtlas Magnum III\u003c\/a\u003e puts out 100 watts from KT120 tubes with a switchable triode mode, the \u003ca href=\"\/products\/rogue-audio-m-180-monoblocks-per-pair\"\u003eM-180\u003c\/a\u003e monoblocks deliver 180 watts, and the flagship \u003ca href=\"\/products\/rogue-audio-m250-ultra-monoblock-amplifier\"\u003eM-250 Ultra\u003c\/a\u003e monoblocks reach 250 watts per channel on KT88 tubes for the most demanding loads. Prefer valve tone with class-D power and control? See our \u003ca href=\"\/collections\/tube-hybrid-amplifiers\"\u003etube hybrid amplifiers\u003c\/a\u003e. Pair any of these with a \u003ca href=\"\/collections\/tube-preamplifiers\"\u003etube preamplifier\u003c\/a\u003e, or browse all \u003ca href=\"\/collections\/power-amplifiers\"\u003epower amplifiers\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"rogue-audio-atlas-magnum-iii-power-amplifier","title":"Rogue Audio Atlas Magnum III Power Amplifier","description":"\u003cp\u003eThe \u003cstrong\u003eRogue Audio Atlas Magnum III\u003c\/strong\u003e is a stereo tube power amplifier that delivers 100 watts per channel from four KT120 output tubes in a push-pull configuration, with a switchable triode mode that drops to 60 watts for a more intimate presentation. Built on the same circuit platform that earned Stereophile Recommended Component status, the Atlas Magnum III brings Rogue's signature tube power to a separate-components system at a price that undercuts most competing tube power amps by a wide margin.\u003c\/p\u003e\n\n\u003ch5\u003eKey Features of the Atlas Magnum III\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 Watts Per Channel (Ultralinear):\u003c\/strong\u003e Four KT120 output tubes in push-pull deliver 100W into 8 ohms, with a switchable 60W triode mode for tonal flexibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Selectable Output Taps:\u003c\/strong\u003e 4-ohm and 8-ohm transformer taps match the amplifier's output impedance to your speakers for optimal power transfer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In Bias Meter:\u003c\/strong\u003e Front-panel meter and rear-panel bias adjustment let you set and monitor tube bias without external tools or experience\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Tube Complement:\u003c\/strong\u003e Two 12AX7 and two 12AU7 driver tubes feed four KT120 output tubes, all user-replaceable and widely available\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive Linear Power Supply:\u003c\/strong\u003e High-storage power supply with slow-start turn-on sequencing protects tubes and delivers stable current under dynamic loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy 2-Ounce Copper Circuit Board:\u003c\/strong\u003e Thick copper traces with short signal paths and precision components keep the noise floor low\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandcrafted in the USA:\u003c\/strong\u003e Designed and built in Brodheadsville, Pennsylvania, with every unit tested, burned in, and auditioned before shipping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eTube Amplifier Architecture\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III uses a classic push-pull output stage with four KT120 tubes, a robust power tube originally developed for military applications and prized in audio for its combination of high power handling and long service life. The driver stage employs two 12AX7 tubes for voltage gain and two 12AU7 tubes as phase splitters, a proven topology that Rogue has refined across three generations of the Atlas platform. The entire circuit is built on a heavy 2-ounce copper board with short signal paths and precision components, minimizing parasitic capacitance and keeping the noise floor well below the music.\u003c\/p\u003e\n\n\u003ch5\u003eUltralinear and Triode Operation\u003c\/h5\u003e\n\u003cp\u003eA rear-panel switch toggles between ultralinear mode (100 watts per channel) and triode mode (60 watts per channel). Ultralinear operation delivers the full rated power with maximum headroom and dynamic punch, making it the natural choice for large-scale orchestral music, rock, and speakers with demanding impedance curves. Triode mode reduces power but shifts the harmonic structure toward a smoother, more liquid midrange that many listeners prefer for small-ensemble jazz, vocals, and acoustic instruments. Both modes are available at any time without powering down.\u003c\/p\u003e\n\n\u003ch5\u003ePower Supply Design\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III's power supply uses a massive high-storage linear design that provides deep energy reserves for sustained bass passages and dynamic peaks. Slow-start turn-on sequencing brings the amplifier up gradually, allowing tubes to reach operating temperature before full voltage is applied. This protects the tubes from thermal shock at startup and contributes to longer tube life across the entire complement. A detachable IEC power cord allows aftermarket cable upgrades for those who want to experiment.\u003c\/p\u003e\n\n\u003ch5\u003eBiasing Made Simple\u003c\/h5\u003e\n\u003cp\u003eTube amplifiers require periodic bias adjustment as tubes age, but Rogue makes the process approachable even for first-time tube owners. The Atlas Magnum III includes a built-in bias meter on the front panel and bias adjustment points accessible from the rear panel. The procedure takes about two minutes with a small screwdriver: flip the bias switch, read the meter, adjust the trim pot until the needle centers, repeat for each tube pair. No multimeter, no experience, no anxiety. Rogue recommends checking bias every few hundred hours or whenever tubes are replaced.\u003c\/p\u003e\n\n\u003ch5\u003e\"Dark\" Version\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III Dark ($3,895) applies Rogue's comprehensive upgrade package to the standard amplifier:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Power Supply:\u003c\/strong\u003e 25% more power supply capacitance with Hex Fred high-speed diodes and polypropylene bypass capacitors for improved current delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Coupling Capacitors:\u003c\/strong\u003e Ultra-premium caps in the signal path for greater transparency and tonal refinement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Tube Complement:\u003c\/strong\u003e Premium matched KT120 output tubes and upgraded small-signal tubes from Psvane, Telefunken, or RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCardas Rhodium Binding Posts:\u003c\/strong\u003e High-quality speaker terminals and connectors throughout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNude Vishay Resistors:\u003c\/strong\u003e Precision resistors in critical input stages for lower noise and greater signal purity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Dark upgrade targets the power supply and signal path components that have the most direct impact on dynamics, noise floor, and resolution. It shares its upgrade philosophy with Rogue's flagship Apollo Dark amplifiers.\u003c\/p\u003e\n\n\u003ch5\u003eExplore the Full Rogue Audio Power Amplifier Lineup\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III is the entry point to Rogue Audio's power amplifier range. The lineup scales from here through flagship monoblocks:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-stereo-100-amplifier\"\u003eStereo 100\u003c\/a\u003e\u003c\/strong\u003e - Same tube topology with Mundorf EVO Oil coupling capacitors, ultra-wide bandwidth output transformers, and mechanically isolated transformers. The reference-grade step up from the Atlas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-dragon-power-amplifier\"\u003eDragoN Power Amplifier\u003c\/a\u003e\u003c\/strong\u003e - 300W hybrid with Rogue's proprietary tubeD circuit pairing 12AU7 tubes with Hypex N-Core Class D modules. Balanced XLR inputs, runs cool, no biasing required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-m-180-monoblocks-per-pair\"\u003eM-180 Monoblocks\u003c\/a\u003e\u003c\/strong\u003e - 180W pure tube monoblocks derived from Rogue's flagship Apollo circuit. Balanced XLR, triode\/ultralinear switching, Stereophile Class A Recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003ePairing with a Rogue Preamplifier\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III pairs naturally with any of Rogue's RP-series preamplifiers. The \u003ca href=\"\/products\/rogue-audio-rp-1-preamplifier\"\u003eRP-1\u003c\/a\u003e offers a tube preamp at the same value-oriented price point, while the \u003ca href=\"\/products\/rogue-audio-rp-5-v2-preamplifier\"\u003eRP-5 v2\u003c\/a\u003e and \u003ca href=\"\/products\/rogue-audio-rp-7-v2-preamplifier\"\u003eRP-7 v2\u003c\/a\u003e add balanced outputs, remote control, and progressively refined circuit topologies. All RP-series preamps use 12AU7 tubes, keeping your tube inventory simple across the system.\u003c\/p\u003e\n\n\u003ch5\u003eThe Listening Room Difference\u003c\/h5\u003e\n\u003cp\u003eWe're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on trust, not hype. We've carried Rogue Audio for years because their products deliver real value and hold up over time. Every component is designed and built in Pennsylvania, and we're proud to support a manufacturer that shares our commitment to quality. Whether you're visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction.\u003c\/p\u003e\n\n\u003ch5\u003eAtlas Magnum III Specifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePerformance\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 WPC (ultralinear) \/ 60 WPC (triode) into 8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmplifier Topology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePush-pull tube, ultralinear\/triode switchable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20Hz - 30kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200K ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Complement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 x KT120, 2 x 12AX7, 2 x 12AU7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eConnections\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGold-plated RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeaker Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGold-plated binding posts (4-ohm and 8-ohm taps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBiasing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUser-adjustable with built-in front-panel meter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-storage linear with slow-start sequencing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\/240V - 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Cord\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDetachable IEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCircuit Board\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy (2 oz) copper with precision components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFaceplate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMachined aluminum (silver or black)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Cage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOptional (included with some configurations)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePhysical\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18\" W x 17\" D x 6.75\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55 lbs (shipping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 years (6 months on tubes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDesigned and handcrafted in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Rogue Audio","offers":[{"title":"Silver \/ Standard","offer_id":41822107828320,"sku":"RAAT3SI","price":2995.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Standard","offer_id":41822107861088,"sku":"RAAT3BL","price":2995.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Dark","offer_id":42192251715680,"sku":"RAAT3SI-Dark","price":3895.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Dark","offer_id":42192251748448,"sku":"RAAT3BL-Dark","price":3895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/AtlasMagnumIIIpoweramplifier.jpg?v=1746037980"},{"product_id":"rogue-audio-m-180-monoblocks-per-pair","title":"Rogue Audio M-180 Monoblocks","description":"\u003cp\u003eFour KT120 tubes per chassis, 180 watts in ultralinear, and circuit topology pulled straight from Rogue's discontinued Apollo flagships. The \u003cstrong\u003eRogue Audio M-180 Monoblocks\u003c\/strong\u003e earned Stereophile Class A Recommended Component status for good reason: switchable triode\/ultralinear operation, balanced XLR and RCA inputs, ultra-wide bandwidth output transformers, and a dedicated high-capacity power supply per monoblock. Handcrafted in Brodheadsville, Pennsylvania, these are the most capable pure tube amplifiers Rogue makes.\u003c\/p\u003e\n\n\u003ch5\u003eKey Features of the M-180 Monoblocks\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e180 Watts Per Channel:\u003c\/strong\u003e Four KT120 output tubes per monoblock deliver 180W in ultralinear mode, with switchable triode operation for tonal flexibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApollo-Derived Circuit Topology:\u003c\/strong\u003e The M-180's gain stage and output stage are derived directly from Rogue's discontinued flagship Apollo amplifiers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced XLR and Single-Ended RCA Inputs:\u003c\/strong\u003e True balanced connectivity with heavy-duty gold-plated XLR and RCA connectors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Wide Bandwidth Output Transformers:\u003c\/strong\u003e Custom-wound transformers with 5Hz to 50kHz (±1dB) frequency response, mechanically isolated from the chassis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriode\/Ultralinear Switching:\u003c\/strong\u003e External switch toggles between 180W ultralinear mode and lower-power triode mode without powering down\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In Bias Meter:\u003c\/strong\u003e Integral bias meter per monoblock for quick, accurate tube biasing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Ohm and 8-Ohm Output Taps:\u003c\/strong\u003e Selectable impedance matching for optimal power transfer to any loudspeaker\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStereophile Class A Recommended Component:\u003c\/strong\u003e Recognized among the finest amplifiers regardless of price\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandcrafted in the USA:\u003c\/strong\u003e Designed and built in Brodheadsville, Pennsylvania, with every unit tested, burned in, and auditioned\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eApollo-Derived Tube Architecture\u003c\/h5\u003e\n\u003cp\u003eThe M-180's circuit topology descends directly from Rogue's flagship Apollo amplifiers, which established the company's reputation at the highest end of tube amplifier design. Each monoblock employs four KT120 output tubes in a push-pull configuration, driven by two 12AU7 and one 12AX7 in the gain and phase-splitter stages. The KT120 is a modern beam tetrode with exceptional plate dissipation and linear characteristics, capable of sustained high-power operation with service life typically reaching 3,000 to 5,000 hours. The entire signal path is built on Rogue's signature heavy 2-ounce copper circuit board with precision components and short signal paths, minimizing parasitic effects and keeping the noise floor well below the music.\u003c\/p\u003e\n\n\u003ch5\u003eTriode and Ultralinear Operation\u003c\/h5\u003e\n\u003cp\u003eAn external switch on each M-180 toggles between ultralinear mode (180 watts, maximum dynamic headroom) and triode mode (reduced power, smoother harmonic structure). Unlike many tube amplifiers that require powering down to change modes, the M-180's switch operates during playback, letting you match the amplifier's character to the music in real time. Ultralinear mode delivers the full authority the M-180 is capable of, with tight bass control and explosive dynamics. Triode mode shifts the emphasis toward midrange liquidity and spatial depth, making it a natural choice for acoustic recordings, vocals, and late-night listening at lower levels.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center; margin: 20px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/m180_inline_silver_front.jpg?v=1774405527\" alt=\"Rogue Audio M-180 monoblock silver finish showing machined aluminum faceplate and tube cage\" style=\"display: block; margin-left: auto; margin-right: auto; border-radius: 15px; max-width: 100%; width: 938px;\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\n\u003ch5\u003ePower Supply and Output Transformers\u003c\/h5\u003e\n\u003cp\u003eEach M-180 monoblock contains a massive high-capacity power supply dedicated entirely to its own output stage, with no power sharing between channels. The energy reserves in each supply are designed to handle sustained low-frequency demands without voltage sag, keeping the output stage in its linear operating region even during the most punishing bass passages. The ultra-wide bandwidth output transformers are custom wound to achieve frequency response from 5Hz to 50kHz (±1dB), well beyond the audible range, ensuring phase accuracy and transient response that approaches the best solid-state designs. These transformers are mechanically isolated from the chassis to prevent vibration from coupling into the signal path.\u003c\/p\u003e\n\n\u003ch5\u003eBalanced Connectivity\u003c\/h5\u003e\n\u003cp\u003eEach M-180 accepts both balanced (XLR) and single-ended (RCA) connections with heavy-duty gold-plated connectors. The balanced inputs make the M-180 particularly well-suited to monoblock placement near speakers, where long interconnect runs between preamplifier and amplifier benefit from balanced cable's common-mode noise rejection. This setup also allows you to use shorter, higher-quality speaker cables while running longer, less expensive XLR interconnects from your preamp. The RP-7 v2 and RP-9 v2 preamplifiers both offer balanced outputs for a fully balanced Rogue signal path.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center; margin: 20px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/m180_inline_rear_panel.jpg?v=1774405523\" alt=\"Rogue Audio M-180 monoblock rear panel showing KT120 output tubes, XLR and RCA inputs, and speaker binding posts\" style=\"display: block; margin-left: auto; margin-right: auto; border-radius: 15px; max-width: 100%; width: 938px;\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\n\u003ch5\u003e\"Dark\" Version\u003c\/h5\u003e\n\u003cp\u003eThe M-180 Dark ($9,495\/pair) applies Rogue's most comprehensive upgrade package to the already well-specified standard amplifier:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Power Supply:\u003c\/strong\u003e 33% larger power supply with Hex Fred high-speed diodes and polypropylene bypass capacitors for increased energy storage and faster recovery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Coupling Capacitors:\u003c\/strong\u003e Ultra-premium coupling capacitors in the signal path for maximum transparency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Tube Complement:\u003c\/strong\u003e Premium matched octets of KT120 output tubes and upgraded small-signal tubes from Psvane, Telefunken, or RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCardas Rhodium Connections:\u003c\/strong\u003e Heavy-duty gold-plated XLR and RCA inputs with Rhodium binding posts from Cardas Audio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNude Vishay Resistors:\u003c\/strong\u003e Precision resistors in critical input stages for lower noise and greater signal purity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 33% power supply increase in the Dark version is the largest of any Rogue Dark upgrade, reflecting the M-180's higher power demands and the benefits of additional energy reserves at this performance level.\u003c\/p\u003e\n\n\u003ch5\u003eExplore the Full Rogue Audio Power Amplifier Lineup\u003c\/h5\u003e\n\u003cp\u003eThe M-180 Monoblocks are Rogue's flagship pure tube power amplifiers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-stereo-100-amplifier\"\u003eStereo 100\u003c\/a\u003e\u003c\/strong\u003e - 100W pure tube stereo with Mundorf EVO Oil caps and ultra-wide bandwidth transformers. If you want Rogue's tube quality in a single chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-atlas-magnum-iii-power-amplifier\"\u003eAtlas Magnum III\u003c\/a\u003e\u003c\/strong\u003e - 100W pure tube stereo at Rogue's most accessible price point. Same KT120 output tubes, same triode\/ultralinear flexibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-dragon-monoblock-amplifiers-pair\"\u003eDragoN Monoblocks\u003c\/a\u003e\u003c\/strong\u003e - 325W hybrid monoblocks with tubeD circuit and Hypex N-Core output. More power, zero maintenance, different sonic character.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003ePairing with a Rogue Preamplifier\u003c\/h5\u003e\n\u003cp\u003eAt the M-180's level, the preamplifier determines the system's character. The \u003ca href=\"\/products\/rogue-audio-rp-7-v2-preamplifier\"\u003eRP-7 v2\u003c\/a\u003e offers balanced outputs and a tube-regulated power supply that matches the M-180's performance tier, while the flagship \u003ca href=\"\/products\/rogue-audio-rp-9-v2-preamplifier\"\u003eRP-9 v2\u003c\/a\u003e extracts maximum resolution with its dual-mono topology and premium components. Both preamplifiers use 12AU7 tubes, keeping your tube inventory consistent across the system.\u003c\/p\u003e\n\n\u003ch5\u003eThe Listening Room Difference\u003c\/h5\u003e\n\u003cp\u003eWe're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on exceptional service and relentless passion for hifi. At this level, every detail matters, and we're here to make sure you get it right. Whether you need help with system matching, setup guidance, or just want to talk through your options before pulling the trigger, owner Mike Hoatson is a phone call away. We don't just ship boxes. We help build systems, and our support lasts well beyond the sale.\u003c\/p\u003e\n\n\u003ch5\u003eM-180 Monoblock Specifications\u003c\/h5\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 16px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: #f5f5f5; padding: 10px 12px; font-weight: bold; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePerformance (Per Monoblock)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e180 WPC (ultralinear), triode mode available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eAmplifier Topology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003ePush-pull tube, ultralinear\/triode switchable (Apollo-derived)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e5Hz - 50kHz ±1dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eTHD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e\u0026lt;0.1% typical, \u0026lt;1.0% at rated power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eInput Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e1.0V RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e200K ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eTube Complement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e4 x KT120, 2 x 12AU7, 1 x 12AX7 per monoblock (matched octets)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: #f5f5f5; padding: 10px 12px; font-weight: bold; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eConnections (Per Monoblock)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eBalanced XLR + single-ended RCA (heavy-duty gold-plated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eSpeaker Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eHeavy-duty gold-plated binding posts (4-ohm and 8-ohm taps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eBiasing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eUser-adjustable with integral bias meter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: #f5f5f5; padding: 10px 12px; font-weight: bold; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePower (Per Monoblock)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eMassive high-capacity linear with mechanically isolated transformers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e120\/240V - 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: #f5f5f5; padding: 10px 12px; font-weight: bold; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eOutput Transformers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eUltra-wide bandwidth, custom wound, mechanically isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eCircuit Board\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eHeavy (2 oz) copper with precision components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eFaceplate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e1\/2\" machined and engraved aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eTube Cage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eWelded-wire cage (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background-color: #f5f5f5; padding: 10px 12px; font-weight: bold; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePhysical (Per Monoblock)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e14.5\" W x 19\" D x 7\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e55 lbs each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e3 years (6 months on tubes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; width: 34%;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eDesigned and handcrafted in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Rogue Audio","offers":[{"title":"Silver \/ Single \/ Standard","offer_id":41822109597792,"sku":"RAM180SISingle","price":3997.5,"currency_code":"USD","in_stock":true},{"title":"Black \/ Single \/ Standard","offer_id":41822109630560,"sku":"RAM180BLSingle","price":3997.5,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Pair \/ Standard","offer_id":42192214065248,"sku":"RAM180SIPair","price":7995.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Triplet \/ Standard","offer_id":42192214098016,"sku":"RAM180SITriplet","price":11992.5,"currency_code":"USD","in_stock":true},{"title":"Black \/ Pair \/ Standard","offer_id":42192214130784,"sku":"RAM180BLPair","price":7995.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Triplet \/ Standard","offer_id":42192214163552,"sku":"RAM180BLTriplet","price":11992.5,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Single \/ Dark","offer_id":42192230744160,"sku":"RAM180SISingleDark","price":4747.5,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Pair \/ Dark","offer_id":42192230776928,"sku":"RAM180SIPairDark","price":9495.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Triplet \/ Dark","offer_id":42192230809696,"sku":"RAM180SITripletDark","price":14242.5,"currency_code":"USD","in_stock":true},{"title":"Black \/ Single \/ Dark","offer_id":42192230842464,"sku":"RAM180BLSingleDark","price":4747.5,"currency_code":"USD","in_stock":true},{"title":"Black \/ Pair \/ Dark","offer_id":42192230875232,"sku":"RAM180BLPairDark","price":9495.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Triplet \/ Dark","offer_id":42192230908000,"sku":"RAM180BLTripletDark","price":14242.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/M-180monoblocksperpair.jpg?v=1746036030"},{"product_id":"rogue-audio-stereo-100-amplifier","title":"Rogue Audio Stereo 100 Amplifier","description":"\u003cp\u003eThe \u003cstrong\u003eRogue Audio Stereo 100\u003c\/strong\u003e is a reference-grade stereo tube power amplifier that delivers 100 watts per channel from four KT120 output tubes through ultra-wide bandwidth output transformers and Mundorf EVO Oil coupling capacitors. With switchable triode\/ultralinear operation, a built-in bias meter, and a fully regulated high-voltage power supply, the Stereo 100 brings the component quality of Rogue's flagship Apollo amplifiers down to a more accessible price point.\u003c\/p\u003e\n\n\u003ch5\u003eKey Features of the Stereo 100\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 Watts Per Channel (Ultralinear):\u003c\/strong\u003e Four KT120 output tubes in push-pull deliver 100W into 8 ohms, with a switchable 60W triode mode for tonal flexibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMundorf EVO Oil Coupling Capacitors:\u003c\/strong\u003e Premium signal-path capacitors included as standard equipment, not reserved for the Dark version\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Wide Bandwidth Output Transformers:\u003c\/strong\u003e Custom-wound transformers with frequency response from 5Hz to 50kHz (±1dB), far wider than typical tube amplifier designs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanically Isolated Transformers:\u003c\/strong\u003e Power and output transformers are mechanically decoupled from the chassis to prevent microphonic vibration from reaching the circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Regulated High-Voltage Supply:\u003c\/strong\u003e Massive regulated power supply provides stable, clean voltage under all operating conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In Bias Meter:\u003c\/strong\u003e Front-panel bias meter with external adjustment points for quick, tool-free tube management\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegral Tube Cage:\u003c\/strong\u003e Included welded-wire tube cage protects output tubes during use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandcrafted in the USA:\u003c\/strong\u003e Designed and built in Brodheadsville, Pennsylvania, with every unit tested, burned in, and auditioned\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eWhat Sets the Stereo 100 Apart\u003c\/h5\u003e\n\u003cp\u003eThe Stereo 100 shares its basic topology with the \u003ca href=\"\/products\/rogue-audio-atlas-magnum-iii-power-amplifier\"\u003eAtlas Magnum III\u003c\/a\u003e (same KT120 output tubes, same 100W\/60W power ratings, same triode\/ultralinear switching), but the components surrounding that topology are substantially upgraded. The Mundorf EVO Oil coupling capacitors, which most manufacturers reserve for their flagship or \"premium upgrade\" models, are standard equipment in every Stereo 100. The custom-wound output transformers extend frequency response to 5Hz-50kHz, more than an octave wider than the Atlas on both ends. And mechanical isolation of the transformers eliminates a common source of tube amplifier noise: vibration coupling from the heavy iron into the signal path. These are the upgrades that separate a very good tube amplifier from a reference-caliber one.\u003c\/p\u003e\n\n\u003ch5\u003eTube Amplifier Architecture\u003c\/h5\u003e\n\u003cp\u003eThe Stereo 100 uses four KT120 output tubes in a push-pull configuration, driven by two 12AX7 voltage gain tubes and two 12AU7 phase splitters. The KT120 is a modern beam tetrode with exceptional power handling and service life, typically lasting 3,000 to 5,000 hours before replacement. All tubes are user-replaceable and widely available from multiple manufacturers, including Gold Lion, JJ, Tung-Sol, and Electro-Harmonix. The entire signal path is built on Rogue's signature heavy 2-ounce copper circuit board with precision components and short signal paths.\u003c\/p\u003e\n\n\u003ch5\u003eUltralinear and Triode Operation\u003c\/h5\u003e\n\u003cp\u003eA rear-panel switch toggles between ultralinear mode (100 watts, maximum headroom and dynamic authority) and triode mode (60 watts, smoother harmonic structure with a more liquid midrange). The switch is accessible during playback and takes effect immediately, letting you match the amplifier's character to the music or the hour. Many Stereo 100 owners run ultralinear for critical listening and dynamic material, then switch to triode for late-night sessions and acoustic recordings.\u003c\/p\u003e\n\n\u003ch5\u003ePower Supply Design\u003c\/h5\u003e\n\u003cp\u003eThe Stereo 100's power supply uses a massive, fully regulated high-voltage design that maintains stable rail voltages regardless of signal demands. This is a step above the unregulated designs found in many tube amplifiers at this price, where rail voltage sag under heavy loads can compress dynamics and soften transients. The regulated supply keeps the Stereo 100's output stage operating in its linear region even during demanding passages, contributing to the amplifier's reputation for bass control that rivals solid-state designs. Slow-start turn-on sequencing protects tubes from thermal shock at startup.\u003c\/p\u003e\n\n\u003ch5\u003e\"Dark\" Version\u003c\/h5\u003e\n\u003cp\u003eThe Stereo 100 Dark ($4,995) applies Rogue's comprehensive upgrade package to the already well-specified standard amplifier:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Power Supply:\u003c\/strong\u003e Additional capacitance with Hex Fred high-speed diodes and polypropylene bypass capacitors for even greater dynamic reserves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMundorf Silver Gold Oil Capacitors:\u003c\/strong\u003e The standard Mundorf EVO Oil caps are replaced with Mundorf's flagship Silver Gold Oil coupling capacitors for maximum transparency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Tube Complement:\u003c\/strong\u003e Premium matched KT120 output tubes and upgraded small-signal tubes from Psvane, Telefunken, or RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCardas Rhodium Connections:\u003c\/strong\u003e Rhodium-plated RCA inputs and Cardas binding posts throughout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNude Vishay Resistors:\u003c\/strong\u003e Precision resistors in critical input stages with Cardas internal wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Dark upgrade takes the Stereo 100 into territory shared with Rogue's flagship Apollo Dark amplifiers. The Mundorf Silver Gold Oil capacitors alone represent a significant investment in signal-path transparency.\u003c\/p\u003e\n\n\u003ch5\u003eExplore the Full Rogue Audio Power Amplifier Lineup\u003c\/h5\u003e\n\u003cp\u003eThe Stereo 100 sits at the heart of Rogue Audio's power amplifier range, offering reference-grade components in a stereo chassis:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-atlas-magnum-iii-power-amplifier\"\u003eAtlas Magnum III\u003c\/a\u003e\u003c\/strong\u003e - Same tube topology at a lower price point. A strong performer that trades the Mundorf caps and wide-bandwidth transformers for value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-dragon-power-amplifier\"\u003eDragoN Power Amplifier\u003c\/a\u003e\u003c\/strong\u003e - 300W hybrid with tube preamp and Hypex N-Core Class D output. More power, balanced XLR inputs, and zero maintenance, in a different sonic character.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-m-180-monoblocks-per-pair\"\u003eM-180 Monoblocks\u003c\/a\u003e\u003c\/strong\u003e - 180W pure tube monoblocks with balanced XLR inputs and Stereophile Class A status. The next step when you want dedicated amplification per channel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003ePairing with a Rogue Preamplifier\u003c\/h5\u003e\n\u003cp\u003eAt the Stereo 100's performance level, the preamplifier becomes the dominant voice in the system. The \u003ca href=\"\/products\/rogue-audio-rp-5-v2-preamplifier\"\u003eRP-5 v2\u003c\/a\u003e makes a natural match at a similar price point, while the \u003ca href=\"\/products\/rogue-audio-rp-7-v2-preamplifier\"\u003eRP-7 v2\u003c\/a\u003e and \u003ca href=\"\/products\/rogue-audio-rp-9-v2-preamplifier\"\u003eRP-9 v2\u003c\/a\u003e extract every bit of resolution the Stereo 100's Mundorf caps and wide-bandwidth transformers can deliver.\u003c\/p\u003e\n\n\u003ch5\u003eThe Listening Room Difference\u003c\/h5\u003e\n\u003cp\u003eWe're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on trust, not hype. We've carried Rogue Audio for years because their products deliver real value and hold up over time. Every component is designed and built in Pennsylvania, and we're proud to support a manufacturer that shares our commitment to quality. Whether you're visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction.\u003c\/p\u003e\n\n\u003ch5\u003eStereo 100 Specifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePerformance\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 WPC (ultralinear) \/ 60 WPC (triode) into 8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmplifier Topology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePush-pull tube, ultralinear\/triode switchable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5Hz - 50kHz ±1dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTHD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.1% typical, \u0026lt;1.0% at rated power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0V RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200K ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Complement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 x KT120, 2 x 12AX7, 2 x 12AU7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eSignal Path\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoupling Capacitors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMundorf EVO Oil (standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Transformers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUltra-wide bandwidth, custom wound, mechanically isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eConnections\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty gold-plated RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeaker Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty gold-plated binding posts (4-ohm and 8-ohm taps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBiasing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUser-adjustable with built-in front-panel meter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMassive fully regulated high-voltage linear design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\/240V - 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCircuit Board\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy (2 oz) copper with precision components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFaceplate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMachined aluminum (silver or black)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Cage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegral welded-wire cage (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePhysical\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18\" W x 17\" D x 7\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 years (6 months on tubes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDesigned and handcrafted in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Rogue Audio","offers":[{"title":"Silver \/ Standard","offer_id":41822110351456,"sku":"RAS100SI","price":4195.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Dark","offer_id":42375005634656,"sku":"RAS100SI-Dark","price":4995.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Standard","offer_id":41822110384224,"sku":"RAS100BL","price":4195.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Dark","offer_id":42375005667424,"sku":"RAS100BL-Dark","price":4995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/Stereo100amplifier.jpg?v=1745932893"},{"product_id":"unison-research-reference-monoblock-amplifiers-pair","title":"Unison Research Reference Monoblock Amplifiers; pair","description":"\u003cp\u003e\u003cstrong\u003eUnison Research Reference Monoblock Amplifiers\u003c\/strong\u003e are the flagship power amplifiers from the legendary Italian manufacturer, delivering pure Class A performance in a massive, no-compromise design. Each monoblock is a statement piece, built to drive the most demanding speakers with authority, grace, and tonal beauty that only high-current tube amplification can achieve.\u003c\/p\u003e\n\u003ch5\u003eKey Features\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e80W pure Class A output:\u003c\/strong\u003e Massive tube power from four 845 triodes per monoblock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble parallel single-ended design:\u003c\/strong\u003e Preserves tonal richness and fluid dynamics under load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual chassis construction:\u003c\/strong\u003e Separates power and signal stages for better noise isolation and performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference-grade tube complement:\u003c\/strong\u003e 4 x 845, 1 x ECC82, 1 x ECC83 per amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBi-wiring speaker outputs:\u003c\/strong\u003e Connect using 4 or 8 ohm taps for optimal matching\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA and XLR inputs:\u003c\/strong\u003e Compatible with both balanced and single-ended preamps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlagship match:\u003c\/strong\u003e Engineered to pair with the Unison Research Reference Pre\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItalian-built, no-compromise design:\u003c\/strong\u003e Over 150 lbs of handcrafted detail and sonic authority\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eFlagship Power, Singular Purpose\u003c\/h5\u003e\n\u003cp\u003eDesigned as the perfect match for the Reference Pre Preamplifier, each Unison Research Reference Monoblock operates in pure Class A with a double parallel single-ended output stage. Using four 845 triodes per amp, this design produces 80 watts of muscular, harmonically rich power with breathtaking control and musicality.\u003c\/p\u003e\n\u003ch5\u003eHandcrafted Dual-Chassis Construction\u003c\/h5\u003e\n\u003cp\u003eEach monoblock is assembled in two sections to isolate power and signal paths. The result is not just reduced interference and better signal integrity, but also a commanding presence both visually and sonically. The craftsmanship is exceptional, from the Italian woodwork and brushed metal to the meticulously selected internal components.\u003c\/p\u003e\n\u003ch5\u003eTuned to the Demands of the Finest Systems\u003c\/h5\u003e\n\u003cp\u003eWith switchable output taps for 4 or 8 ohms and both RCA and XLR inputs, the Reference Monoblocks adapt to high-end systems without compromise. The amps are designed to handle even the most complex speaker loads, delivering a soundstage that is deep, dimensional, and richly layered.\u003c\/p\u003e\n\u003ch5\u003eTube Complement and Bias\u003c\/h5\u003e\n\u003cp\u003eEach monoblock is equipped with 4 x 845 output tubes, supported by 1 x ECC82 and 1 x ECC83 in the input\/driver stage. Internal circuitry and thermal design allow for long-term tube stability and minimal maintenance, while still allowing seasoned tube enthusiasts to roll valves if desired.\u003c\/p\u003e\n\u003ch5\u003eMatched with the Unison Research Reference Pre\u003c\/h5\u003e\n\u003cp\u003eThese amplifiers were born from the same engineering vision that created the Unison Research Reference Pre, and they perform best when paired together. \u003ca title=\"Unison Research Reference Pre\" href=\"\/products\/unison-research-reference-pre-stereo-tube-preamplifier\"\u003eView the Unison Research Reference Pre page to learn more\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch5\u003eReference Monoblock Reviews\u003c\/h5\u003e\n\u003cblockquote style=\"border-left: 6px solid #A3704D; background-color: #ffffff; padding: 1em 1.5em; font-style: italic; margin: 2em 0;\"\u003e“When everything settles and the mind calms, what's left is music: vivid, beautiful, whole, and rendered with uncommon care. The Unison Reference amplifiers turn spending into savoring, and savor them I did.” \u003cbr\u003e\u003cbr\u003e\u003cspan style=\"font-style: normal; display: block; margin-top: 0.5em;\"\u003e — Rogier van Bakel, \u003cem\u003eStereophile\u003c\/em\u003e \u003c\/span\u003e \u003cspan style=\"font-style: normal; display: block; margin-top: 0.5em;\"\u003e \u003ca href=\"https:\/\/www.stereophile.com\/content\/unison-research-reference-monoblock-power-amplifier\" style=\"color: #a3704d; text-decoration: underline;\" target=\"_blank\"\u003eRead the full article at Stereophile\u003c\/a\u003e \u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eThe Listening Room Difference\u003c\/h5\u003e\n\u003cp\u003eThe Unison Research Reference Monoblock Amplifiers aren't the kind of products that get dumped precariously at your doorstep. At this level, white-glove matters. That’s why \u003cstrong\u003eMichael Hoatson, owner of The Listening Room\u003c\/strong\u003e, personally hand-delivers and installs these units nationwide \u003cstrong\u003efor free with purchase\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eMike works closely with every customer to ensure proper system integration, voltage matching, gain staging, and phono configuration. No shipping company will handle this preamp with the care and technical precision he brings to your door.\u003c\/p\u003e\n\u003cp\u003eWe’re a \u003cstrong\u003ethird-generation, family-owned high-end audio store\u003c\/strong\u003e based in Chestertown, Maryland. You’ll speak directly with us: no chatbots, no middlemen, no call centers. Just expert advice, unmatched service, and a shared passion for sonic perfection.\u003c\/p\u003e\n\u003cp\u003eHave questions about pairing this with the right monoblocks, cartridges, or cabling? Call or email us anytime. We’re here for your entire hi-fi journey.\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eMono Valve Power Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Stage\u003c\/th\u003e\n\u003ctd\u003eDouble parallel single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClass\u003c\/th\u003e\n\u003ctd\u003ePure Class A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eValves\u003c\/th\u003e\n\u003ctd\u003e4 x 845, 1 x ECC82, 1 x ECC83\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Power\u003c\/th\u003e\n\u003ctd\u003e80 watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrequency Response\u003c\/th\u003e\n\u003ctd\u003e20 Hz – 30 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFeedback Factor\u003c\/th\u003e\n\u003ctd\u003e14 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Impedance\u003c\/th\u003e\n\u003ctd\u003e4 Ohm and 8 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutputs\u003c\/th\u003e\n\u003ctd\u003eLoudspeakers bi-wiring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInputs\u003c\/th\u003e\n\u003ctd\u003e1 x RCA, 1 x XLR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Impedance\u003c\/th\u003e\n\u003ctd\u003e47 kOhm (RCA), 10 kOhm (XLR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003eApprox. 400 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e49 cm x 77.5 cm x H 28.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNet Weight\u003c\/th\u003e\n\u003ctd\u003e70 kg \/ 155 lbs (each)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Unison Research","offers":[{"title":"Default Title","offer_id":42134361178208,"sku":"URREFMA","price":49999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/UnisonResearchReferenceMonoblockamplifiers-2ofthemdiagonalview.jpg?v=1752520789"},{"product_id":"rogue-audio-m250-ultra-monoblock-amplifier","title":"Rogue Audio M-250 Ultra Monoblock Amplifier","description":"\u003cp\u003eThe Rogue Audio M-250 Ultra is a pure tube monoblock amplifier and the new flagship of Rogue Audio's amplifier lineup. A worthy successor to the Apollo Dark, the M-250 Ultra combines a continuous power output of over 250 watts with ruler-flat frequency response, tremendous bandwidth, and vanishingly low distortion. Like every Rogue Audio product, the M-250 Ultra is designed and hand-built in Brodheadsville, Pennsylvania.\u003c\/p\u003e\n\n\u003ch5\u003eKey Features of the Rogue Audio M-250 Ultra\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonoblock design:\u003c\/strong\u003e Dedicated amplifier per channel for perfect channel separation and zero crosstalk\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive linear power supply:\u003c\/strong\u003e Enormous high-storage linear power supplies enable the reproduction of musical transients far beyond the amplifier's rated output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-high performance transformers:\u003c\/strong\u003e Ultra-high tolerance components and huge transformers contribute to peerless build quality\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube complement:\u003c\/strong\u003e 6x KT88, 2x 12AU7, and 1x 12AX7 tubes per amplifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in bias meters:\u003c\/strong\u003e Individual bias switches and a built-in meter make tube biasing straightforward, even for tube newcomers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriode\/ultralinear switching:\u003c\/strong\u003e On-the-fly switch lets you select either Triode or Ultralinear operation to tailor the sonic character to your speakers and preferences\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced and single-ended inputs:\u003c\/strong\u003e Both XLR (balanced) and RCA (single-ended) connections for flexibility across system configurations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 and 8 ohm binding posts:\u003c\/strong\u003e Heavy-duty rhodium-plated binding posts with multiple impedance taps for optimal speaker matching\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRhodium-plated connectors:\u003c\/strong\u003e Heavy-duty rhodium-plated RCA connectors and binding posts throughout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll precision components:\u003c\/strong\u003e Every unit is fully tested, burned-in, and auditioned before shipping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Entirely designed and built at the Rogue Audio facility in Brodheadsville, Pennsylvania\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003ePower and Finesse in Equal Measure\u003c\/h5\u003e\n\u003cp\u003eThat these pure tube amplifiers deliver a continuous power output of over 250 watts is but a small part of the story. The M-250 Ultra was designed and engineered without compromise. The enormous linear power supplies enable the reproduction of musical transients at far beyond the amplifier's rated output, giving the M-250 Ultra the headroom to handle demanding passages and difficult speaker loads with authority. Whether your passion is jazz, rock, or symphonic works, the M-250 Ultra provides the clarity and dynamics to closely rival the original performance.\u003c\/p\u003e\n\n\u003ch5\u003eA New Chapter for Rogue Monoblocks\u003c\/h5\u003e\n\u003cp\u003eThe M-250 Ultra represents a bold design departure for Rogue Audio. Where the Apollo monoblocks featured the brand's familiar rectangular chassis, the M-250 Ultra adopts a compact cube form factor with clean, modern lines. The CNC-machined brushed aluminum enclosure houses the tubes beneath a recessed viewing window on top, creating a striking visual presence that is distinctly different from anything Rogue has built before. The overall build quality reflects Rogue's continued investment in American manufacturing.\u003c\/p\u003e\n\n\u003ch5\u003eExplore the Full Rogue Audio Monoblock Lineup\u003c\/h5\u003e\n\u003cp\u003eThe M-250 Ultra joins Rogue Audio's monoblock amplifier range alongside two currently available models:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/rogue-audio-m-180-monoblocks-per-pair\" title=\"Rogue Audio M-180 Monoblocks\"\u003eRogue Audio M-180 Monoblocks\u003c\/a\u003e – 180 watts per channel in ultralinear mode, with KT120 output tubes and Rogue's proven monoblock platform\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/rogue-audio-dragon-monoblock-amplifiers-pair\" title=\"Rogue Audio DragoN Monoblock Amplifiers\"\u003eRogue Audio DragoN Monoblock Amplifiers\u003c\/a\u003e – Rogue's hybrid monoblock design combining a tube input stage with a MOSFET output stage for 300+ watts of power\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eThe Listening Room Difference\u003c\/h5\u003e\n\u003cp\u003eWe're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on trust, not hype. We've carried Rogue Audio for years because their products deliver real value and hold up over time. Every component is designed and built in Pennsylvania, and we're proud to support a manufacturer that shares our commitment to quality. Whether you're visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction.\u003c\/p\u003e\n\n\u003ch5\u003eRogue Audio M-250 Ultra Specifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 WPC in Ultralinear mode with KT-88 tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTHD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLess than 0.1% typical, 1% at peak\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20Hz - 25kHz at full output; 10Hz - 100kHz at 10 watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0V RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBalanced (XLR) and Single-Ended (RCA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeaker Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 ohm and 8 ohm rhodium-plated binding posts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Complement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6x KT88, 2x 12AU7, 1x 12AX7 (per amplifier)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12.75\" W x 18\" D x 13\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e88 lbs each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e115V\/230V, 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Rogue Audio","offers":[{"title":"Silver \/ Single","offer_id":42597412208736,"sku":"RAM250USI-Single","price":9497.5,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Pair","offer_id":42670143504480,"sku":"RAM250USI-Pair","price":18995.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Triplet","offer_id":42670143537248,"sku":"RAM250USI-Triplet","price":28492.5,"currency_code":"USD","in_stock":true},{"title":"Black \/ Single","offer_id":42670143570016,"sku":"RAM250UBL-Single","price":9497.5,"currency_code":"USD","in_stock":false},{"title":"Black \/ Pair","offer_id":42670143635552,"sku":"RAM250UBL-Pair","price":18995.0,"currency_code":"USD","in_stock":false},{"title":"Black \/ Triplet","offer_id":42670143668320,"sku":"RAM250UBL-Triplet","price":28492.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/m250_pair_white.jpeg?v=1774905259"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/collections\/M-180monoblocksperpair_eb1f8f5f-552d-418c-9c74-56ad9a565520.jpg?v=1783518415","url":"https:\/\/listenroom.com\/collections\/tube-power-amplifiers.oembed","provider":"The Listening Room","version":"1.0","type":"link"}