Hey, how's it going. My name is dan, i'm actually one of the guys you were talking to earlier at columbus car audio.
I had forgotten that the new rockford fosgate power series amps have what is called a differential input rca setup, and will accept a balanced input. So, in theory you could do what you were wanting with those. I also think that the JL slash series amps are the same. What kind of 4 channel did you already get?