I have 2 audiobahn AW1571SE subs. How big of an amp would I need to make them sound well? I bought a California 1200 watt amp but when I play them the amp dies and the power shuts off. The speakers sound horrible. I just don't know what to do. Can anyone help with my problem. Here are the specs of the 2 subs.

One 15” NATURAL SOUND WOOFER
60 oz. Strontium Magnet
Power Handling: 500 watts R.M.S.
Frequency Response: 21Hz - 1kHz
Efficiency: 93.4 dB
PHAT Foam Surround
Non- Pressed, Non-Transfer Paper Cone
KM3’ Coated for Virtually No Cone Distortion
2” 4-Layer ASV Voice Coil
Dual 4 Ohm
2 Ohm or 8 Ohm Operation
Mounting Dimensions: Depth; 6 7/8” Hole; 13 7/8” Diameter; 15 3/8”
Mult-Connect Lug Lock Terminals