I purchased one of the B-stock units from the recent sale. This is an excellent subwoofer, very fast and extremely musical, and a remarkable value. You'll rarely hear an acoustic bass reproduced more faithfully, whether plucked or bowed. All my jazz recordings sound fresh and new. Plus, it can really deliver when movies layer on the LFE content. I've been using an SVS sonotube subwoofer, but I find the Outlaw X-12 superior in every way.