This is a compact (~6x8x7 inches) subwoofer amp made by TBI. It is rated at 150 watts @ 8ohms and can be used with most subs. Of course it is packaged for use with TBIs Magellan subs, and I can attest it performs wonderfully with them.
It is in like new condition- no scratches or dings and it works perfectly.


It has a 2 position phase switch, 50-150 hz. crossover control, auto-on circuitry.
More info here:
http://www.tbisound.com/dsp_products_subwtbi200.aspReview of sub with amp:
http://www.stereotimes.com/speak112204.shtmlI've decide to use a dedicated bass management system with my sub, so this is no longer needed.
They are $450 new; I'll sell mine for $250 inc. shipping and fees to the cont. US.
Thanks for having a look!