in my 1st setup, I had it running thru my panasonic HU, with 5v preout. NEVER used the disc, or radio again. SO it was just a processor with x-over. So, I decided to run a 1/2 din parametric eq, and the one I used was the clarion 746 (friend had it, not being used), and I tell u this... 50 times better sound. I didnt change my amps, components, or subs. Just went from a HU to an EQ. Used it from Monday to Friday, and loved every second of it. As far as amps and other stuff, I was running a 225 HCCA on 2 sets of RFP162S components and a 2100 HCCA on 3 PBX D1 15s.