Dear Jim, Have a 4 channel Rockford Fosgate amp,and a Kenwood 2 channel one. I have 2 front speakers,2 rear and 1- 12 in. Subwoofer. The Rokford I was going to use with the front and rears,now the Rockford as you knoe has a "Pass Thru" rca signal.How would yeah come into the Rokford(wiring) and using the through pass ,how would yeah go out of rockford and into the kenwood and then out of the kenwood(to sub) and would you bridge the sub(jl audio). Also I have a Kenwood excelon KDC-X811 Unit which has the adjustable hertz cutting mode.Will the Kenwood amp still comply with this?The kenwood amp has a power control hook up also,is that same as rockfords REM?And can you splice off the Power,Ground and REM off the rockford to the kenwood?

I wouldn't splice a wire but I would get a separate wire and run it and try your best to fit it on where the wire connects.