smokeoff 10+ year member
here's my 3 cents
I plan on stepping up my system to 4 subs. I will keep the 2 I have now (polk 12" Gnxs) and just buy another 2 because I am happy with their proformance. My ? is in the amp. Should I buy a second amp like my 1st and basicly double my setup...or get 1 new amp with the ability to power all 4 subs. And what amp would you suggest?