There are 6 power amplifier tubes, 4 for left and right channels, and the other 2 are connected to the for circuit for subwoofer use. Circuit: A total of 6 disassembled power amplifier tubes and 2 disassembled large capacitors are used, 4 of which are responsible for left and right channels, and the other 2 are connected to circuits for subwoofer use.
eBay