These subs rock.. they are tough as all hell. I have two of them running on 2 500watt amps in 2.0 cubic foot ported boxes. They really move the air, making them pound better than every other 12" sub I have tryed.
First let me tell u I got these speakers 7 year ago and they lasted longer than the car i put them in! I've still got them hooked 2 a 900watt autotek amp I got the same day. THESE THINGS POUND AND COME BACK 4 MORE!!!!!!!!! AUTOTEK AN OUTSTANDING PRODUCT.
This is a great 12" subwoofer. I got it used from a store, and it hits way harder w/ a 300 watt amp, than my previous setup with 2 12" jensons and a 700 watt TIS amp. A very durable and well made subwoofer. Great quality product, as to be expected from Audiotek! Unfortunatly these are discontinued, so if you ever happen to stumble across one of these at a pawn shop or such location... BUY IT.
I had two of theses on two 1200 watt mono block opti drive. They hit extremly hardddddddd!