Details：

PCB size: 169x86mm works voltage: AC220V-0-AC220V （above 30mA) 0-AC6.3V (1.5A) 0-AC12V （1.5A） Marantz 7 circuit‘s full of sound, mellow voice, dynamic and low frequency. For many years, it is still a must-see for HIFI fans. In the circuit, each channel uses a 12AX7 for voltage amplification, and DAN1 is connected to a cathode follower as a signal buffer. Its function is equivalent to using an emitter follower, which can have a relatively low output internal resistance, and its circuit features are overall. Loop feedback design, which is a major factor in the Marantz 7 fame. The PCB also can compatible ALPS 27 type Potentiometer.

Note：

if choose Diy Kit ，all parts need buyer to solder ！ （not included 3pcs tubes，but included 1pcs 6Z4 tube） if choose Assembled Board ，have tested it well ！（not included 3pcs tubes，but included 1pcs 6Z4 tube）