According to this the amp is 1ohm stable, so that is not your problem:http://cgi.ebay.com/ws/eBayISAPI.dll?Vie...bayphotohosting
Its one of three things. 1) The wires to your subs are shorting out or wired incorrectly (most likely) 2) Your amp is toast 3) You have a blown subwoofer & the voice coil has a dead short.
The best way to find the problem is to swap parts. Get a friends subs, see how they work. Hook your subs to your friends amp. And so on, till you find the problem.
How you you like your Kappa Perfect 12's? I love mine. I
run mine with a JBL BP600 amp.