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The Ayon Audio Orthos XS is a premium monoblock tube amplifier from Austria, designed for audiophiles seeking ultimate sound quality and power. It features a full balanced vacuum tube design with KT150 tubes, switchable between pentode and triode modes, delivering 300 watts per channel in pentode mode and 180 watts in triode mode at 8 ohms. The amplifier is built with high-grade materials including a silver-copper matrix internal signal cable, gold-plated industrial grade PCB, and a high-grade aluminum chassis with anti-vibration and non-magnetic properties. It weighs 50 kg and measures 35 x 61 x 25 cm. The Orthos XS offers a wide bandwidth of 8 Hz to 70 kHz, a frequency response of 15 Hz to 50 kHz, and a signal-to-noise ratio of 98 dB. It supports RCA and XLR inputs and has an input sensitivity of 1000-1200 mV. The amplifier is praised for its powerful, dynamic, and natural sound with excellent imaging, 3D soundstage, and a smooth, rich tonal balance. It is considered one of the best sounding KT150 amplifiers worldwide, suitable for driving difficult loudspeaker loads with ease and delivering a refined tube sound with impressive bass punch and detail resolution. The Orthos XS has won multiple awards including the 6MOONS Blue Moon Award and Positive Feedback Editors Choice for Best Sound.
Amplification power output and characteristics
Analog signal output specifications
Size, weight, and appearance
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Estimated price (community-sourced)
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The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The SA-Reference's signal-to-noise is 100 dB against the Orthos XS's 98 dB, its weight 57 kg (126 lbs) against 50 kg (110 lbs), and its height 275 mm against 250 mm. Both share power @ 8ω (300W).
Both turn up in the same documented systems.
The Crossfire II's power @ 8ω is 30W against the Orthos XS's 300W and its weight 45 kg (99 lbs) against 50 kg (110 lbs). Both share signal-to-noise (98 dB) and class (A).
The Epsilon Evo Signature Mono's power @ 8ω is 200W against the Orthos XS's 300W and its weight 40 kg (88 lbs) against 50 kg (110 lbs). Both share class (A) and width (350 mm).
The MC2301's signal-to-noise is 117 dB against the Orthos XS's 98 dB, its class Tube against A, and its weight 52.6 kg (116 lbs) against 50 kg (110 lbs). Both share power @ 8ω (300W).
Audio Research Corporation Reference 250 SE Mono
Soulution 710
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