Hello, I have a subwoofer Klipsh RT12D
There was a defective main board, the master took it to the repair, but on CD + CD-6V. The master about your video where CD + CD-8.1V says that it means nothing. You need a service manual to know how it should be.
Can you please tell me if you have any circuits with the full names of radio components (what details should be with their name and denomination)?