Yamaha - C-6 前置放大器

1980年的雅马哈传奇前置放大器，完好运行，一只旋钮在搬家时丢失后已更换。以下为规格。
Frequency response: 10Hz to 100kHz
Total harmonic distortion: 0.01%
Input sensitivity: 0.1mV (MC), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 88dB (MC), 97dB (MM), 102dB (line)
Channel separation: 70dB (MM), 70dB (MC), 70dB (line)
Output: 150mV (line), 2V (Pre out)