Kassai Mono vs Kegon Mono
The Kegon Mono matches the Kassai Mono on power @ 8ω (18W), power @ 4ω (18W), class (A), and weight (20 kg (44 lbs)).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower AmplifiersTube Amplifiers
AI-generated product photo — not official manufacturer imagery.
Estimated price (community-sourced)
Around — community and catalog average, updates slowly
The Audio Note Kassai Mono Power Amplifier is a pure Class A single-ended valve amplifier featuring a pair of 300B output valves in a parallel single-ended circuit. It is hand assembled and engineered for sonic performance rather than just technical specifications, fulfilling Audio Note (UK) Level 4 criteria including pure Class A operation, zero negative feedback, single-ended output stage, valve rectification, and directly heated triode operation. Each amplifier includes custom Audio Note (UK) output transformers with copper primary windings and silver secondary windings on UHiB double C cores, 1 Watt tantalum resistors, copper foil capacitors, silver internal wiring, and Black Gate capacitors in critical areas. The balanced version adds high-quality input transformers with copper primary and silver secondary windings. The amplifier delivers 18 watts RMS per channel into 4 or 8 ohm loads, with an input impedance of 100K ohm (600 ohm for balanced), and input sensitivity of 250mV (standard), 3.15V (low gain), or 1.6V (balanced). Valve complement includes 2 x 6SN7 (one per chassis), 4 x 300B (two per chassis), and 2 x 5U4GB (one per chassis). Dimensions are 195mm (H) x 205mm (W) x 500mm (D) per amplifier, weighing 20kg each. The amplifier is noted for its musicality, delivering a full musical construct without focusing on any single attribute, and is suitable for audiophiles who value music enjoyment and quality engineering. Due to Audio Note's policy, the product is supplied to order with an approximate 8-week build time and is not available for mail order.
Amplification power output and characteristics
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 Kegon Mono matches the Kassai Mono on power @ 8ω (18W), power @ 4ω (18W), class (A), and weight (20 kg (44 lbs)).
The Gaku-On's power @ 8ω is 45W against the Kassai Mono's 18W, its power @ 4ω 45W against 18W, and its weight 27.5 kg (61 lbs) against 20 kg (44 lbs). Both share class (A).
The Ongaku's power @ 8ω is 27W against the Kassai Mono's 18W, its power @ 4ω 20W against 18W, and its weight 48 kg (106 lbs) against 20 kg (44 lbs). Both share class (A).
The Tomei Kensei's power @ 8ω is 20W against the Kassai Mono's 18W, its power @ 4ω 20W against 18W, and its weight 38 kg (84 lbs) against 20 kg (44 lbs). Both share class (A).
Both turn up in the same documented systems.
Kondo Audio Note Japan Overture PM-2i
The specs and the pairings above are open to everyone. Sign up and you get the system builder, the assistant, a compatibility check against the gear you already own, and a watch on this product so a price or pairing change reaches you.
Sign up freeKondo Audio Note Japan Ongaku Kensei