I have a 12" kicker comp r subwoofer, it is 500 watts rms and is 4 ohm dual voice coil, only used for about 4 months and it was properly broke in and sounds great, the amp is a kicker Dx series 500.1 and is only a couple weeks old, they both work great, I just want to upgrade to dual subs agian, I will also throw in a pair of kicker rca cables that are 15' long, they were to short for me to use