Hi! Greetings from South Africa.I'm a newbie to car sound & just purchased a pair of Calibra Twister subs. They are 12" 300W rms dvc's (4ohms/coil). Calibra holds the south african spl record so I thought what the heck, let me get a pair. The damn things just cannot seem to get enough power for them to work to full power. I had a Blaster amp sending about 200W rms to each coil thinking that would be enough to get a thumping sound & save the subs from any potential damage. I've tested the system and got about 148dBs but the funny thing is the speakers hardly seem to move. I've got them setup in a separate dual chamber bandpass design for my hatch. What I wish to know is are there any good amps that you know of that I can purchase to get the full potential of my system?