These are some awesome subs. Pretty close to the same sub as the
Soundsplinter Rl-i which is built by TC Sounds that sell for 170 each or 153 each if you buy two.
http://oaudio.com/TC2_PLUS.html
These are marked down to 99 each
http://www.tcsounds.com/
Here's the parameters
link to PDF
These subs are rated for 400 watts rms. They use copper shorting rings, (lower distortion) and have woven tinel leads(Stonger and does not hit the cone)
Here's a review of this sub and the Ascendant Audio Atlas.
http://www.diymobileaudio.com/forum/showthread.php?t=8
If I was going to get 10" subs I'd be all over these. Unfortunately the 12" subs are not on sale, so I'm going to get a pair of Peerless XXLS 12" The new car version should be available soon.