I assume you are running the stock wiring harness from the head unit to the doors speakers and to the door subwoofer amps, right?
Edit: And crutchfield lists zero subwoofer preamp outputs for your model headunit (assuming you have the AVH-2300DVD). Not sure if you are actually plugging your front subs into the Front speaker RCA outputs or if crutchfield's information is incorrect...
2005 Windveil Blue GT (MT)
93H Bama tune, JLT Series 3 CAI, FRPP CMDPs, Pype bomb super system, 3.73 gears, Steeda shift bushings, Saleen short shift block
Steeda ultralite springs, Tokiko D-specs, J&M Extreme joint UCA/LCAs, PHB, C/C plates, bumpsteer kit, Steeda Q1S wheels, 2011 GT brakes, 275/40R18 Sumi HTR Ziii tires