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The Thrax Audio Orpheus MK3S is a premium phono stage designed for audiophiles seeking the highest fidelity in vinyl playback. It features two tube gain stages with zero feedback and a passive LCR equalizer for precise RIAA equalization. The unit includes a built-in step-up transformer for moving coil cartridges, programmable gain and loading, and accepts both balanced and unbalanced inputs via RCA and XLR connectors. It switches ground planes with input selection to prevent ground loops and offers programmable absolute phase per input. The power supply uses a choke input rectifier and shunt regulated constant current PSU for ultra-low noise and excellent dynamic behavior. The chassis is solid aluminum with modular construction and microprocessor control. The input stage uses a super low noise D3a German Post tube loaded by a constant current cascode, feeding a custom passive LCR RIAA correction filter made with OFC coils and silver capacitors. The Orpheus MK3S is designed to deliver transparent, dynamic, and natural sound without the artifacts of feedback or hum loops, making it a modern masterpiece in tube phono preamplification.
Amplification power output and characteristics
Analog signal output specifications
Phono stage specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
Estimated price (community-sourced)
Around — community and catalog average, updates slowly
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Master Line Stage's signal-to-noise is 69 dB against the Orpheus MK3S's 84 dB, its mc gain 64 dB against 62 dB, and its output voltage 8.0V RMS against 10.0V RMS. Both share mm gain (44 dB).
The 2008's signal-to-noise is 100 dB against the Orpheus MK3S's 84 dB, its mc gain 64 dB against 62 dB, and its output voltage 28.0V RMS against 10.0V RMS. Both share mm gain (44 dB).
The Statement Phono's signal-to-noise is 72 dB against the Orpheus MK3S's 84 dB, its mc gain 54 dB against 62 dB, its mm gain 34 dB against 44 dB, and its output voltage 12.0V RMS against 10.0V RMS.
The NHB-18 NS Mk1's signal-to-noise is 92 dB against the Orpheus MK3S's 84 dB, its mc gain 54 dB against 62 dB, its input impedance 30000Ω against 47000Ω, and its weight 27 kg (60 lbs) against 15 kg (33 lbs).
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