Machine parameters:
Maximum output power: 30W
Total harmonic distortion: 1.5%
Input sensitivity: 1.2V
Signal-to-noise ratio: 74dB (broadband), 86dB (A weighting)
Frequency response: 20HZ~27K (-2dB)
Electronic tube configuration：
Power tube: 212
Push the tube (1): 300B
Push the tube (2) 2A3
Voltage amplifier tube: 101D
Rectifier tube: 274B
Power buffer tube: 6sN7
Voltage regulator: wy-1, wy-2
