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. Key Features of the Sphinx v3 100 Watts Per Channel (8 Ohms): Hypex UHD MOSFET-based Class D output stage with a damping factor exceeding 1,000 for authoritative speaker control Pure Tube Mu-Follower Preamplifier: Matched 12AU7 tubes in a mu-follower topology borrowed from Rogue's higher-end designs Built-In MM/MC Phono Stage: User-adjustable gain settings of 44dB and 60dB accommodate both moving magnet and moving coil cartridges Discrete MOSFET Headphone Amplifier: Capable of driving demanding headphones with a dedicated front-panel 1/4" output Custom 375VA Toroidal Transformer: Massive power supply provides deep energy storage for low-frequency response and dynamic headroom Tube-Driven Active Outputs: Variable outputs driven by the tube stage for connecting a subwoofer or bi-amping Alps Custom Volume Potentiometer: Precision volume control with optional metal remote Eco-Conscious Design: Standby power of just 6 watts, 132 watts at half power, and 250 watts at full output Handcrafted in the USA: Designed and built in Brodheadsville, Pennsylvania, with every unit tested, burned in, and auditioned Hybrid Amplifier Architecture 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. Built-In Phono Stage 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. Headphone Amplifier 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. Power Supply Design 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. What Changed from Previous Sphinx Models Redesigned MM/MC Phono Section: The v3 received a completely new phono stage based on a scaled-down version of the Triton II, with user-adjustable gain (44/60dB) for both MM and MC cartridges New Headphone Amplifier: The chip-amp headphone circuit was replaced with a discrete MOSFET design capable of driving more demanding headphones Upgraded Components: Improved components and power supply sections feeding the output modules New Circuit Boards: Redesigned main and rear circuit boards with improved layout "Magnum" Version The Magnum edition upgrades the standard Sphinx v3 with premium components throughout: Power supply upgrades: Enhanced capacitors and regulated supply stages for improved dynamics Upgraded coupling capacitors: Premium coupling caps in the signal path Upgraded phono stage: Premium components in the phono section for lower noise JJ Gold Pin 12AU7 tubes: Premium matched tubes with tighter tolerances and lower noise Upgraded binding posts: Higher-quality speaker terminals for better contact Upgraded caps and resistors: Premium components in key circuit locations Metal remote control: Included (optional on the standard model) Explore the Full Rogue Audio Integrated Amplifier Lineup 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: Cronus Magnum III - 100W all-tube integrated with KT88 output tubes, triode/ultralinear switching, and a redesigned phono stage. Pure tube throughout. Pharaoh II - 250W hybrid flagship with Hypex N-Core power, balanced XLR inputs, home theater bypass, and Mundorf EVO oil coupling capacitors. The Listening Room Difference 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. Sphinx v3 Specifications Performance Power Output 100 WPC minimum into 8 ohms Amplifier Topology Hybrid: tube mu-follower preamp + Hypex UHD Class D power amp THD
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