Audiophilepure

“Class A single-ended directly heated no feedback triode amplifiers, with only the very best parts and materials available, fully silver wired high content nickel iron C-core output transformers, Black Gate capacitors throughout where available, silver foil signal capacitors, and both circuit and power supply hard wired with silver wire.”

So, the Ongaku’s Level Five design criteria includes a circuit that is pure Class A operation, with zero negative feedback, a single-ended output stage utilizing 211 valves for 20 watts of output power, rectification via robust 5R4WGB valves, directly heated triode operation, Audio Note (UK) silver wire for all internal wiring, Audio Note (UK) two-watt non-magnetic tantalum resistors, either Black Gate electrolytic or Audio Note (UK) silver foil capacitors, and Audio Note (UK) in-house custom-designed and manufactured driver and output transformers that have fully silver-wired AN-Perma 50 nickel C-cores, and the mains transformer has a copper-wired HiB double C core.