There is no effective way to clean the pots, they will need to be replaced. I have tried taking the pots apart on other PG amps and cleaning them, but the problem is never dirt and grime, it is wear on the conductive surface the wiper rides against. The ZPA series is great for nostalgia purposes, b...

Hello Everybody, I come from the land of Phoenix Gold (Portland, OR) with a love for car audio. I was fortunate enough that my first car came with an old but great sounding system that I took for granted and didn't understand its value (Alpine CDA-7977, MTX 5-channel, infinity kappas all around, 2 1...