I just picked up 4...15" subs, 2 are AUDIOBAHNS with the flames, and the other 2 are an MTXAUDIO 5500THUNDER series, and a black sub with some red graphics that say "C2". I also have 2 Phoenix digital 2chl 2000 watt amps, is this enough amp power for these 4? And I've been in prison for some years, I never heard of these brands, do I have quality, or crap?}