1. do i need to have both rca inputs connected on a cfa1000d, or just one? the reason i am asking, is because i am using a bridging module.

i have four amps.

i now have 2 briding modules. one module for each amp. before i had 1, and it was louder.

before, i used splitters from the module, and ran the signals to the - and + amps, and then ran the signal from the rca OUT to the next respective amp.

now, i have 2 modules. i simply pulled apart a dual rca cable, and ran one rca from one side of the module to the + amp, and another from the other side of the module to the - amp...

but before, it was louder. it works now, but when i turned on the cd player, it wasnt nearly as loud.

sorry for this confusing mess