When I hook each one of them in, 1 at a time, each one works and sounds great. When I have 2 hooked in it sounds more middy. This might be because I didn't re-wire them to test 2 subs, I left the wiring them same as if I were gonna run all 4.
My wiring is all correct. When I have all four hooked in it sounds terrible. Any ideas?
Some pictures just for a visual. I only had two hooked up to the amp.

