Alright, to begin, I have the Rockford Fosgate Prime R500-1 Amplifier and a 12'' Pioneer TS-w309d4 subwoofer(s). Before when i only had one sub i was running it at 2ohms and it was very loud, but just recently i added another subwoofer of the same kind and since my amp cannot support a 1ohm load i was forced to wire it into a 4ohm load, but now it seems like i had more bass when i was using only 1 sub. I'm not sure how that is possible and i was just looking for some help. Would re-tuning my amplifier help or what? I just dont want to mess up the settings i currently have on the amp if changing it isnt going to work. As of right now I have my subs wired at 1ohm which causes my amp to go into protect mode after about 30 minutes, but it is giving me some mad bass, but im looking to wire it correctly with nearly the same results before i damage my amp.