I needed a plate amp to complete my DIYS subwoofer project so I bought a pair of RT3000P Sub amps on eBay, only needed one. I mounted a 12" NHT speaker in a Parasound cabinet and tried to hook up the speaker directly to the amp. Not good but no harm. I found the wiring diagram on this forum, many thanks, and discovered I need the volume control that plugs into the board so I don't over drive the NHT again. Does anyone know where I can get a couple of these precious volume controls? I am very impressed with the way these amps are made, heavy too. I just joined this forum and am thankful for the information posted.