Sundown Audio and Stereo Integrity have teamed up to create one mean little entry level subwoofer dubbed the "E12."
One single E12 in a sealed .5 cubic foot box managed to reach 140.0 dB @ 51 Hz.
These will run around $140 MSRP and they will be rated for about 200 - 300 watts continuous. From the testing that has been done on the woofer so far, it appears to be able to handle much more power as well.
