Ok, where to begin. There is no way to word this without exposing myself as the noob I have found myself to be. I thought I knew something about car audio, I was laughably wrong about that. So, please be gentle, lol. The car I am working with is a 03 Volvo S-40.My head unit is an old school Eclipse (model CD8443). After the Eclipse is an Alpine EQ(model ERE-G160) After the EQ is 2 amplifiers, both by Focal. A 6-channel (model FDP6900) and a monoblock (model FDP1900). For speakers i have a pair of full range Rockford Punch (model P152) were installed in custom made kick-panels and the factory dash tweets were replaced by a pair of Rockford Primes(modelR1FS). I might add that the factory system wasn't too shabby. It was a 6 speaker system with tweets in the dash, 5 1/4" woofers in the front doors and full range, 6 1/2" speakers in the rear deck. The tweets were run off the factory head unit and the other four speakers came from a factory amp in the trunk. Anyway, the factory woofers are still in the door and the factory 6.5's are still in the back dash. In the trunk are 2 JL 12" subs (model 12W0v3) that are SVC speakers running parrallel to the single channel Focal. Now, the Eclipse runs in Standard or Pro mode. The RCA outs/(ins?) on the Eclipse are labeled: Line-in/out(front/hi), Line-in/out(rear/mid), Line-out (non-fader/Low), and then the mysterious pair labled "fixed out". On the alpine EQ, there is only input for a single left/right channel input, the low level output from the EQ is divided into four channels of left/right and front/rear. The 6 channel focal has 6 input(obviously) and they claim each channel will accept high or low level input. There is a selector switch for 2,4,6 inputs. Each set of inputs has lp and hp adjustments. The monoblock has 2 channels of input and 2 channels of output. It also has a phase adjustment and EQ adjustment, along with the lp/hp adjustments. Also on both amps is an internal switch for switching from "balanced/unbalance" and I have no idea what that is about. So, the first part of my question is about the signal itself. It seems i have a number of options and i'm not entirely sure how to articulate them. See, the eclipse has a switch to change the rca outs to ins. In theory, i could run the low/nonfading output to the EQ input and then run the 2 each front/rear output from the eq to the output/input hi/mid input on the eclipse and then run the high level out the eclipse to four channels of the 6 channel amp. Although then i'm not sure what i would do about sub signal. Or, use the nonfader/low output to the monoblock sub amp and run the high or mid out to the input channel of the amp. There are numerous ways to do this and honestly, i dont know which way to go. Idealy, i would like to have 8 channels of RCA headed to the amps but that seeems extreme. Any help at all would be much appreciated.
The more I learn, the less I understand.