yes i am running one sub and it has on the amp where to place the + and - on the amp terminal to bridge it but bridging I think would put to much power to one sub...thats why I was using 1 channel. My sub is rated at IIRC 300RMS so thats why i was using one channel.
I think i tried putting the RCA's through all the possible combinations to correct the treble. The only inputs where my sub worked is where I have them in the pic.
