ultra subs ib infinite

Review of Ultra Subs A-12 Subwoofer @Vertex Audio hooked me up with an Ultra Subs A-12. I have experience with the Ultra Subs LV10 subwoofer, which I absolutely love. The A-12 is part of Ultra Subs entry level series. But this is far from "entry level". MSRP is $150. The subwoofer is...