Maintained! A masterpiece transistor type power amplifier from McKinn's heyday. The powerful, rich, and thick tone is a popular gem among jazz fans of yesteryear. The sound combined with JBL vintage speakers is exceptional. There is rust on the back corner of the exterior (Mizusaki Ryo)
Maintenance information: 2025.12.17 maintained (SP relay, sliders replaced due to plastic cracks in L and R sliders, full METER RANGE, SP switching SW complete disassembly and cleaning, rear input level SW, STEREO/MONO SW, POWER GUARO SW, complete disassembly and cleaning. The SP terminal, RCA terminal, and exterior have been cleaned. Input/output waveform confirmation, meter adjustment (Watts/dB adjustment), load test (1 kHz sine wave, at 8 ohm load: 200W+200W, OK)
Accessories: copy of instruction manual
Main specifications: 200W+200W (1/2/4/8Ω) input sensitivity 0.75/2.5V W411 × H181 × D368 mm 38.6 kg