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The Ayon Audio Spheris Phono is a high-end, two-chassis vacuum-tube stereo phono preamplifier manufactured in Austria. It uses a pure Class A, triode circuit with a single gain stage and a minimal signal path incorporating one coupling capacitor at the output stage. The unit supports single-ended and balanced output operation, includes selectable cartridge loading through external load plugs/jumpers, and is supplied with an external Spheris AC~ Regenerator power supply designed to provide stable, regulated and purified AC power. Ayon describes it as a limited-production reference phono stage. Published specifications vary between sources and production revisions, particularly for frequency response, signal-to-noise ratio, and total weight; the figures below identify those variations where applicable.
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
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Orpheus's signal-to-noise is 84 dB against the Spheris Phono's 100 dB, its output voltage 10.0V RMS against 5.0V RMS, its input impedance 390Ω against 300Ω, and its weight 15 kg (33 lbs) against 46 kg (101 lbs).
The Enyo MK2's signal-to-noise is 103 dB against the Spheris Phono's 100 dB, its thd 1.000% against 0.100%, and its output impedance 1Ω against 300Ω. Both share class (A).
The Reference 6SE's signal-to-noise is 109 dB against the Spheris Phono's 100 dB, its thd 0.010% against 0.100%, its output voltage 2.0V RMS against 5.0V RMS, and its output impedance 600Ω against 300Ω.
The WAVE Tube's signal-to-noise is 90 dB against the Spheris Phono's 100 dB, its thd 0.010% against 0.100%, its output voltage 6.0V RMS against 5.0V RMS, and its output impedance 60Ω against 300Ω.
Audio Research Corporation Reference 10 Line Stage
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