I installed a 500.1 Kicker Class D amp in my 04 CTS-V. Used 4 ga. power and ground. Grounded to good chasis ground and using a loc piggybacking off my stock bose 10". The amp is powering a Sony 12" xplod 1300w pentagonal sub. 1.25 cu ft box. I have spoken with Kicker and they have heard of Class...