Recent content by markgiardino

Thanks, but i just discovered the problem by experimenting. when i threw a switch on the amp from 1/2 to 3/4 the sub control started working.

I just had a shop install a Alpine 9815 HU, and an Alpine MRV-F340 4 Channel Amp. They used channels 1 and 2 for the fronts, the HU for the rears and briged 3 and 4 for my single 10" sub. The sub is always on and the hu's sub level control has no effect. The installer says this is because of...