{"title":"Tube Phono Preamplifiers","description":"\u003cp\u003eA tube phono preamplifier amplifies the tiny signal from a moving-magnet or moving-coil cartridge and applies RIAA equalization through a vacuum-tube stage, adding valve warmth to vinyl at the most delicate point in the chain. Because the phono stage works with the lowest signal levels in the system, its noise floor and loading options matter more here than anywhere else, and a well-designed tube stage brings body and air to records without losing detail. This collection holds all-tube phono stages from Rogue Audio, built in Pennsylvania, and Unison Research of Italy, for both MM and MC cartridges.\u003c\/p\u003e\u003cp\u003eRogue's \u003ca href=\"\/products\/rogue-audio-ares-ii-tube-phono-preamplifier\"\u003eAres II\u003c\/a\u003e is a low-noise tube phono stage with adjustable loading and gain for low, medium, and high-output cartridges. Unison Research offers the \u003ca href=\"\/products\/unison-research-phono-one-tube-preamplifier\"\u003ePhono One\u003c\/a\u003e and \u003ca href=\"\/products\/unison-research-simply-phono-tube-preamplifier\"\u003eSimply Phono\u003c\/a\u003e for valve-driven vinyl, each with switchable settings to match your cartridge. A tube phono stage is the natural front end for a valve system. Add a \u003ca href=\"\/collections\/tube-preamplifiers\"\u003etube preamplifier\u003c\/a\u003e to complete a valve front end, or browse all \u003ca href=\"\/collections\/phono-preamps\"\u003ephono preamps\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"unison-research-simply-phono-tube-preamplifier","title":"Unison Research Simply Phono Tube Preamplifier","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Unison Research Simply Phono Tube Preamplifier offers exceptional tube-driven performance, making it a standout choice for vinyl enthusiasts. With a design that builds on its predecessors while incorporating modern improvements, this preamplifier delivers a warm and detailed listening experience that brings out the best in your vinyl collection.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003ePure Class A Tube Circuitry:\u003c\/strong\u003e Features four ECC83\/12AX7 double triodes operating in pure Class A with no global or local negative feedback, ensuring low distortion and natural sound.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003ePrecision RIAA Equalization: \u003c\/strong\u003eA passive RIAA equalization network, using high-quality resistors and capacitors, provides accurate frequency response across the entire audio spectrum.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eStable Power Supply: \u003c\/strong\u003eEquipped with a high-voltage power supply and precise voltage regulation, ensuring consistent performance and dynamic response.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Input Impedance Settings: \u003c\/strong\u003eAdjustable input impedance allows compatibility with a variety of Moving Magnet (MM) and Moving Coil (MC) cartridges.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eLow Crosstalk and Noise: \u003c\/strong\u003eSymmetrical board design and advanced filtering minimize crosstalk and noise, enhancing overall sound quality.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eAbout Unison Research\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eUnison Research, founded in Italy, has a long-standing reputation for crafting high-fidelity audio equipment that marries traditional craftsmanship with cutting-edge technology. Each product reflects their passion for music and dedication to producing equipment that delivers both sonic excellence and visual beauty. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eDesign and Build\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Simply Phono preamplifier is designed with careful attention to detail, offering a refined sound that enhances your vinyl playback. The unique “ionic bias” configuration in the first gain stage reduces noise and distortion, while the passive RIAA equalization ensures accurate frequency response. This combination results in a dynamic and natural sound that stays true to the original recording.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe robust power supply is a key feature, providing more than 300V of stable, low-ripple power for consistent performance. Additional filtering and regulation circuits help minimize cross-talk and power supply rejection ratio (PSRR), particularly in the first gain stage, ensuring a clean and immersive listening experience.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003eOptional Power Supply\u003c\/h5\u003e\n\u003cp\u003eChoice for an optional power supply is available to increase your sonic results.\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eThe Listening Room Experience\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003eYour listening space is unique, and so are your needs. That's why we take the time to understand your preferences, your room acoustics, and your sonic dreams. We'll guide you through our range of hi-fi options, ensuring you find the perfect match for your space and budget. We believe in personal connections, exceptional service, and expert advice because when it comes to sound, there's no one-size-fits-all solution. Contact us to learn more.\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003eSpecifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStereo Phono Valve Preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClass\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePure Class A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRIAA Equalization\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePassive ±0.2 dB (20 Hz – 20 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e800 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 x line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e52 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Harmonic Distortion (THD)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.4% at 1 volt output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSignal to Noise Ratio (S\/N)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-72 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 x phono input for MM or MC cartridges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e47 Kohm \/ 100 \/ 50 \/ 22 ohm \/ 100 pF (modifiable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeedback Factor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValves\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 x ECC83 \/ 12AX7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e140 x 290 x 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 kg (including power supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Unison Research","offers":[{"title":"Simply Phono Only (no power supply)","offer_id":41872506978400,"sku":"URSIMPLYPHONO","price":2199.0,"currency_code":"USD","in_stock":true},{"title":"Add SimplyPhono Power Supply","offer_id":41872506355808,"sku":"URSIMPLYPHONOWPS","price":3099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/products\/UnisonResearchSimplyPhonoTubePreamp.jpg?v=1741607162"},{"product_id":"unison-research-phono-one-tube-preamplifier","title":"Unison Research Phono One Tube Preamplifier","description":"\u003cp\u003eThe Unison Research Phono One has always been a beloved choice among audiophiles, earning a reputation for its timeless design and superior sound quality. Recognizing the continuous demand for this classic, Unison Research has reintroduced the Phono One, blending the cherished aesthetics of the original with modern technological enhancements that push the boundaries of audio fidelity.\u003c\/p\u003e\n\u003ch5\u003eKey Features\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTen Triode Design: \u003c\/strong\u003eUtilizes 5 ECC83\/12AX7 double triodes in parallel for reduced noise and distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e54dB Gain: \u003c\/strong\u003eCompatible with all MM and most MC cartridges, providing ample amplification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise RIAA Equalization:\u003c\/strong\u003e Features a passive network with carefully selected components for accurate sound reproduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Input Impedance: \u003c\/strong\u003eAllows matching of resistance and capacitance to your cartridge for optimal performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Power Supply Design:\u003c\/strong\u003e Independent RC filter cells minimize cross-talk and enhance channel separation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandcrafted Quality:\u003c\/strong\u003e Includes hand-soldered wiring, oversized power components, and enhanced cooling for long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eAbout Unison Research\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eUnison Research, founded in Italy, has a long-standing reputation for crafting high-fidelity audio equipment that marries traditional craftsmanship with cutting-edge technology. Each product reflects their passion for music and dedication to producing equipment that delivers both sonic excellence and visual beauty. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003eTimeless Design Meets Modern Engineering\u003c\/h5\u003e\n\u003cp\u003eWhile the exterior of the Phono One remains faithful to its original, elegant form, the internal circuitry has been significantly upgraded. The inclusion of ten triodes (5 ECC83\/12AX7 double triodes) configured in parallel achieves exceptional noise reduction and distortion control. This enhancement also boosts the overall gain to approximately 54dB, making it versatile for use with a wide range of cartridges.\u003c\/p\u003e\n\u003cp\u003eThe Phono One employs a meticulously selected passive RIAA network, ensuring precise adherence to the equalization curve. Upgraded output capacitors further improve bandwidth and minimize phase rotation at low frequencies, delivering a sound that's both expansive and intricately detailed.\u003c\/p\u003e\n\u003ch5\u003ePrecision and Flexibility\u003c\/h5\u003e\n\u003cp\u003eUnderstanding the critical nature of cartridge matching, the Phono One offers selectable input resistance and capacitance, allowing for a tailored fit to any cartridge’s requirements. A dedicated spot on the PCB is reserved for custom resistor values, ensuring that even the most discerning audiophiles can fine-tune their setup for optimal performance.\u003c\/p\u003e\n\u003cp\u003eThe power supply design is another area where the Phono One excels. With independent RC filter cells for each gain stage, it dramatically reduces cross-talk, achieving nearly immeasurable low-frequency interference at less than -90dB. This meticulous attention to detail extends to the layout design, which enhances channel separation and interference rejection, culminating in an audio experience of exceptional natural detail and musical clarity.\u003c\/p\u003e\n\u003ch5\u003eCraftsmanship Without Compromise\u003c\/h5\u003e\n\u003cp\u003eEvery aspect of the Phono One reflects Unison Research’s commitment to quality. From the hand-soldered signal wiring to the placement of tubes designed to minimize microphonic distortions, no detail has been overlooked. Oversized power components and proper cooling measures ensure long-term reliability, making the Phono One not just a piece of equipment, but a lasting investment in high-fidelity audio.\u003c\/p\u003e\n\u003ch5\u003e\n\u003cmeta charset=\"utf-8\"\u003eThe Listening Room Difference\u003c\/h5\u003e\n\u003cp\u003eYour listening space is unique, and so are your needs. That's why we take the time to understand your preferences, your room acoustics, and your sonic dreams. We'll guide you through our range of hi-fi options, ensuring you find the perfect match for your space and budget. We believe in personal connections, exceptional service, and expert advice because when it comes to sound, there's no one-size-fits-all solution. Contact us to learn more.\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStereo Phono Valve Preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClass\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePure A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRIAA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePassive +\/- 0.1 dB (20 Hz - 20 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e800 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 x Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e54 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Harmonic Distortion (THD)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1% at 1V output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSignal to Noise Ratio (S\/N)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e–80 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 per MM or MC phono cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e47 kOhm, 100, 50, 22 ohms \/ 100, 200, 320, 420 pF (modifiable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeedback Factor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValves\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 x ECC83 \/ 12AX7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e37.3 x 5.84 x 24.63 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 3.6 kg (including power supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Unison Research","offers":[{"title":"Default Title","offer_id":40271274115168,"sku":"URPHONOONE","price":3799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/products\/Unisonresearchphonoonepreamp.jpg?v=1741604817"},{"product_id":"rogue-audio-ares-ii-tube-phono-preamplifier","title":"Rogue Audio Ares II Tube Phono Preamplifier","description":"\u003cp\u003eThe \u003cstrong\u003eRogue Audio Ares II\u003c\/strong\u003e is an all-tube phono preamplifier with three gain settings, custom Cinemag step-up transformers, and a fully regulated outboard power supply. It handles everything from high-output MM cartridges to low-output MC designs, with internal loading options and subsonic filtering. Designed and hand-built in Brodheadsville, Pennsylvania.\u003c\/p\u003e\n\n\u003ch5\u003eKey Features of the Ares II\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-Tube Signal Path:\u003c\/strong\u003e Pure tube circuit topology using 2 x 12AX7 and 2 x 12AU7 for warm, natural sound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree Gain Settings:\u003c\/strong\u003e 40dB, 55dB, and 64dB to accommodate any cartridge output level\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom Cinemag Step-Up Transformers:\u003c\/strong\u003e High-quality signal transfer for MC cartridges with minimal noise\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutboard Power Supply:\u003c\/strong\u003e Fully regulated linear design with toroidal transformer, physically separated from the audio circuitry\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Loading Options:\u003c\/strong\u003e Popular impedance values plus 150pF or 0pF capacitance loading\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMono Switch:\u003c\/strong\u003e Combines left and right channels for mono pressings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubsonic Filtering:\u003c\/strong\u003e Reduces low-frequency rumble to protect speakers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTimer-Delayed Start:\u003c\/strong\u003e 30-second warm-up sequence minimizes turn-on noise and extends tube life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise RIAA Equalization:\u003c\/strong\u003e Accurate phono curve reproduction across the full frequency range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandcrafted in the USA:\u003c\/strong\u003e Heavy 2-ounce copper circuit boards, Teflon\/silver-plated hookup wire, machined aluminum faceplate\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eTube Circuit Design\u003c\/h5\u003e\n\u003cp\u003eThe Ares II uses a pure tube signal path with no solid-state devices in the audio circuit. Two 12AX7 tubes handle the initial gain stage, and two 12AU7 tubes manage the output. The tube circuit is flexible enough to accommodate substitutions: replacing the 12AU7s with 12AT7 tubes adds about 9dB of gain, while 12AX7 substitutions add roughly 12dB. This gives you room to experiment with tube rolling and fine-tune the gain structure to your specific cartridge and system without any modifications to the unit itself.\u003c\/p\u003e\n\n\u003ch5\u003eCartridge Compatibility and Loading\u003c\/h5\u003e\n\u003cp\u003eWith three gain settings (40dB, 55dB, 64dB) and internal loading options, the Ares II accommodates nearly any cartridge on the market. The 40dB setting handles high-output MM cartridges, 55dB covers high-output MC designs, and 64dB reaches low-output MC cartridges that need serious amplification. Internal loading can be set to popular impedance values, and capacitance loading is selectable between 150pF and 0pF. Whether you're running a Hana ML, a Goldring E3, or a high-end Lyra, the Ares II has the flexibility to get the best from your cartridge without needing external loading boxes or adapters.\u003c\/p\u003e\n\n\u003ch5\u003eOutboard Power Supply\u003c\/h5\u003e\n\u003cp\u003eThe power supply is fully regulated, linear, and housed in a separate chassis connected by an umbilical cable. This is not a cosmetic choice. Keeping the toroidal transformer and power regulation physically away from the sensitive phono circuitry eliminates the hum and noise that plague phono stages with internal power supplies. The result is a black background that lets you hear detail in your records you may not have noticed before, especially in quiet passages and low-level ambient cues.\u003c\/p\u003e\n\n\u003ch5\u003eBuild Quality and Construction\u003c\/h5\u003e\n\u003cp\u003eThe Ares II reflects the same build standards as Rogue's more expensive components. Heavy 2-ounce copper circuit boards (comparable to what you'd find in the $7,500 Lamm LP2), Teflon\/silver-plated internal hookup wire, ultra-heavy-duty gold RCA jacks, and a machined aluminum faceplate. Every unit is individually tested, burned in, and auditioned before shipping. This is not mass production; it's hand assembly with quality control at every step.\u003c\/p\u003e\n\n\u003ch5\u003e\"Magnum\" Version\u003c\/h5\u003e\n\u003cp\u003eThe Magnum upgrade takes the Ares II platform and adds premium components in the most critical parts of the signal path. According to Rogue, the Magnum version adds additional gain for very low output cartridges, improves inner detail, and improves accuracy. The upgrades include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCinemag \"blue label\" step-up transformers:\u003c\/strong\u003e Higher-grade transformers for improved MC performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePRP resistors:\u003c\/strong\u003e Precision metal-film resistors in critical signal path locations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMundorf Supreme inter-stage coupling caps:\u003c\/strong\u003e Premium capacitors known for transparency and detail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCardas internal wiring and RCA jacks:\u003c\/strong\u003e Upgraded throughout for better signal transfer and connection quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eWhat Changed from the Original Ares\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedesigned motherboard:\u003c\/strong\u003e Lower noise floor than the original Ares\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMono switch added:\u003c\/strong\u003e Not available on the original Ares or first-generation Magnum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThird gain setting:\u003c\/strong\u003e 64dB option for very low output MC cartridges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefined RIAA equalization:\u003c\/strong\u003e Tighter accuracy across the frequency range\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eSystem Matching\u003c\/h5\u003e\n\u003cp\u003eThe Ares II pairs naturally with any of the Rogue Audio preamplifiers. The \u003ca href=\"\/products\/rogue-audio-rp-1-v2-preamplifier\"\u003eRP-1 v2\u003c\/a\u003e is a strong entry point, while the \u003ca href=\"\/products\/rogue-audio-rp-5-v2-preamplifier\"\u003eRP-5\u003c\/a\u003e, \u003ca href=\"\/products\/rogue-audio-rp-7-v2-preamplifier\"\u003eRP-7\u003c\/a\u003e, and \u003ca href=\"\/products\/rogue-audio-rp-9-v2-preamplifier\"\u003eRP-9\u003c\/a\u003e offer increasing refinement up the line. If you want an integrated solution with a built-in phono stage instead, the \u003ca href=\"\/products\/rogue-audio-cronus-magnum-iii-integrated-amplifier\"\u003eCronus Magnum III\u003c\/a\u003e includes MM\/MC phono capability, though the Ares II offers more gain flexibility and the advantage of a dedicated outboard power supply.\u003c\/p\u003e\n\n\u003cp\u003eFor a solid-state alternative, Rogue also makes the \u003ca href=\"\/products\/rogue-audio-triton-ii-solid-state-phono-preamplifier\"\u003eTriton II\u003c\/a\u003e, which takes a different approach with transistor-based amplification for listeners who prefer that sound.\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\u003eSpecifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTube Phono Preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGain Settings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40dB, 55dB, 64dB (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCartridge Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMM and MC (low, medium, and high output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLoading\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInternal settings for popular impedance values; 150pF or 0pF capacitance loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEqualization\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePrecise RIAA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Complement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 x 12AX7, 2 x 12AU7 (tube rolling supported: 12AT7 or 12AX7 substitutions for 12AU7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStep-Up Transformers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCustom Cinemag (\"Blue Label\" on Magnum)\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\u003eOutputs\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\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFully regulated outboard linear supply with toroidal transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMono switch, subsonic filter, timer-delayed start (30-second warm-up)\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\u003eInternal Wiring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTeflon\/silver-plated hookup wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMachined aluminum faceplate\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\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17\" W x 9\" D x 5.5\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22 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":41822107664480,"sku":"RAAR2SI","price":2395.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Standard","offer_id":41822107697248,"sku":"RAAR2BL","price":2395.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Magnum","offer_id":42192440819808,"sku":"RAAR2SI-Magnum","price":2995.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Magnum","offer_id":42192440852576,"sku":"RAAR2BL-Magnum","price":2995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/AresIIMagnumphonopreamplifier_06218639-2147-4c96-b66e-65bed94d4ae5.jpg?v=1746038874"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/collections\/Unisonresearchphonoonepreamp.jpg?v=1783518084","url":"https:\/\/listenroom.com\/collections\/tube-phono-preamplifiers.oembed","provider":"The Listening Room","version":"1.0","type":"link"}