I've got a 95 Suburban. Had speakers in all 4 doors and rear pillars (3 pairs).
I installed a 6 preout head unit, a D4000.4 amp, a pair of db651's and a pair of db6501's yesterday. It sounds great but I want more. More bass and more volume without distortion. I can't decide whether to just get a 10" sub (or???) with a bridged 2000.2 or to get another 4000.4 and add a pair of 6x9's to the mix. What's concerning me about the 6x9's is: 1. I've got to cut some metal to make them fit (stock is 4x10) which is not that big a deal and 2. with only 6 preouts on my HU, I'm going to have to split one of the full range pairs of pre's. I know I can adjust the voltage gain on the amp but I'm wondering how this is going to affect the sound quality.