Title says it: I'm looking to buy 2 (4 ch.) amp and most 4 channel amps have separate inputs for the front and rear channels... But I only have 3 preamp outputs on my H.U. and so I'd like to not need a 2nd input to one of the amps...If I'm going to run all 4 channels of an amp off of the same frequency range (prior to the amp crossover) , can I use a single input without losing the ability to adjust the gain on the amp independently for each pair of outputs?
Thanks for all the help guys.