this is the amp:http://cgi.ebay.com/NEW-HIFONICS-TXI1508D-1500w-RMS-MONO-CAR-AMPLIFIER-AMP_W0QQitemZ220403281090QQcmdZViewItemQQptZCar_Amplifiers?hash=item220403281090&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A10%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50
2 of these subs:http://cgi.ebay.com/NEW-KICKER-CVX12-CAR-AUDIO-12-CVX-STEREO-L7-SUB-WOOFER_W0QQitemZ220378757692QQcmdZViewItemQQptZCar_Subwoofers_Enclosures?hash=item220378757692&_trksid=p3286.c0.m14&_trkparms=72%3A1234%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50
when it comes to car audio nine times out of ten you get what you pay for- and you need to look for CEA-compliant brands which means that the amps have been tested and produce or exceed the advertised RMS wattage with minimum distortion and the subs can handle their advertised RMS wattage also (distortion is the main cause of speaker damage over time)
here are the top CEA-compliant brands
Alpine
Bazooka
Blaupunkt
Clarion
Eclipse
Infinity
JBL
JL Audio
JVC
Kenwood
Kicker
Lightning Audio
MTX
Orion
Pioneer
Polk Audio
PPI
Rockford Fosgate
Sony
you want an amp that puts out its advertised RMS wattage and speakers that can handle their rated RMS wattage also because if not you could damge the amp, speakers or both-- not to mention distortion is the main cause of speaker damage over time and with cheap stuff thats what you get
its IMPORTANT to know the "REAL" RMS wattage pushing/handling specs of your equipment because if you dont its IMPOSSIBLE to properly match
If you send too much power to your sub, you risk damaging it. The cone of the speaker and the mechanical parts that make it move may break under the stress. Surprisingly, too little power can also damage your subwoofer — in fact, it's actually more common than damage caused by overpowering.
When the volume is turned up and the amp doesn't have enough power, the signal becomes distorted, or "clipped." This distorted signal can cause parts of the speaker to overheat, warp and melt. Not good!
You don't have to match speaker and amp wattages exactly. An amp with a higher output than the speaker's rating won't necessarily damage the speaker — just turn the amp down a bit if you hear distortion from the sub and don't run the speaker at extremely loud volumes for lengthy periods. Likewise, you'll be OK with a lower powered amp if you keep the volume down and don't feed a distorted signal to the sub
you will send the amp into clipping
Clipping
Clipping occurs when an amplifier is asked to deliver more current to a speaker than the amp is capable of doing. When an amplifier clips, it literally cuts off the tops and bottoms of the musical waveforms that it's trying to reproduce, thus the term. This introduces a huge amount of distortion into the output signal. Clipping can be heard as a crunching sound on musical peaks.
that causes distorted sound which will damage your subs
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