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Rogue Audio Sphinx v3 Integrated Amplifier
The Rogue Audio Sphinx v3 is a hybrid integrated amplifier that delivers 100 watts per channel by pairing a pure tube mu-follower preamplifier with a Class D solid-state output stage, all powered by a custom 375VA toroidal transformer. With a built-in MM/MC phono stage, a discrete MOSFET headphone amplifier, and tube-driven active outputs for subwoofer connection, it packs the functionality of three separate components into a single 25-pound chassis designed and built in Pennsylvania.
The Sphinx v3 uses the same mu-follower preamplifier topology found in Rogue's more expensive designs, including the Pharaoh II and the RP preamp line. A pair of matched 12AU7 tubes handles all voltage amplification in the preamp stage, preserving the harmonic texture that makes tube preamplifiers desirable. The tube preamp feeds into a pair of Hypex UHD amplifier modules, MOSFET-based Class D output devices that deliver 100 watts per channel into 8 ohms with a damping factor exceeding 1,000. A custom 375VA toroidal transformer and a massive high-storage linear power supply with multiple regulated stages provide clean, stable power throughout the circuit. The heavy 2-ounce copper circuit board uses precision components and short signal paths to keep the noise floor low.
The Sphinx v3's phono section is a scaled-down version of Rogue's standalone Triton II phono preamplifier design. It accommodates both moving magnet and moving coil cartridges with user-adjustable gain settings of 44dB and 60dB, selectable via internal switches. This means you can run most cartridges without needing a separate phono preamp. For a fully dedicated phono stage with more loading options and tube amplification, see our Rogue Audio Ares II or the solid-state Triton II.
Unlike many integrated amplifiers that use inexpensive chip amplifiers for headphone output, the Sphinx v3 features a discrete MOSFET-based headphone circuit. This design can source substantial current, making it suitable for high-impedance studio headphones and sensitive in-ear monitors alike. The headphone output is on the front panel via a standard 1/4" jack. For a dedicated headphone experience with tube amplification, Rogue also offers the RH-5 Headphone Amplifier.
The Sphinx v3's power supply starts with a custom 375VA toroidal transformer feeding a massive high-capacity linear supply. Multiple regulated power supply stages isolate the critical preamp and amplifier sections from each other, reducing noise coupling between stages. The result is deep energy reserves for bass passages and dynamic peaks, combined with a quiet, black background through the midrange and treble. Rogue's slow-start turn-on sequencing brings the amplifier up gradually, protecting tubes and extending the life of all components.
The Magnum edition upgrades the standard Sphinx v3 with premium components throughout:
The Sphinx v3 is the entry point to Rogue Audio's integrated amplifier range. Looking for more power or a different design approach? Explore the rest of the lineup:
We'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.
| Performance | |
| Power Output | 100 WPC minimum into 8 ohms |
| Amplifier Topology | Hybrid: tube mu-follower preamp + Hypex UHD Class D power amp |
| THD | <0.1% typical, <1% at rated power |
| Frequency Response | 20Hz - 20kHz |
| Input Sensitivity | 1.0V RMS |
| Damping Factor | >1,000 |
| Tube Complement | Matched 12AU7 pair (mu-follower configuration) |
| Phono Stage | |
| Gain | 44dB / 60dB (user adjustable) |
| Cartridge Compatibility | MM and MC |
| Headphone Amplifier | |
| Circuit Type | Discrete MOSFET |
| Output Jack | 1/4" stereo |
| Connections | |
| Inputs | 4 x gold-plated RCA (Phono, Line 1, Line 2, Line 3) |
| Outputs | Tube-driven active outputs for subwoofer or bi-amping |
| Speaker Outputs | Gold-plated binding posts |
| Power | |
| Transformer | Custom 375VA toroidal |
| Power Consumption | Standby: 6W / Half: 132W / Full: 250W |
| Power Requirements | 120/240V - 50/60Hz |
| Construction | |
| Volume Control | Alps custom potentiometer |
| Circuit Board | Heavy (2 oz) copper with precision components |
| Faceplate | Machined aluminum (black or silver) |
| Remote Control | Optional metal remote (included with Magnum) |
| Power Cord | Detachable IEC |
| Physical | |
| Dimensions | 15.5" W x 17" D x 5" H |
| Weight | 25 lbs (shipping: 30 lbs) |
| Warranty | 3 years (6 months on tubes) |
| Country of Origin | Designed and handcrafted in the USA |
Award: Blue Note Award 2025 "The Rogue Audio Sphinx V3 Magnum hybrid integrated stereo amplifier is bordering on becoming one of the true classics in audio." "The V3 Magnum had a bit more snap and more sparkle." "The phono section seems more agile and communicative than the previous model." "All for one, and one for all! best sums it up with Rogue Audio Sphinx V3 Magnum."
,Enjoy the Music · April 2025
Award: Stereophile Recommended Components 2022 "One of the greatest high-value audio products of all time." "I am experiencing genuine musical happiness."
,Stereophile · July 2020
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