Awesome! After having had all the different bass setups in my car, starting with the SWS-8s, then a single 12 in a standard sealed enclosure, then a JL 12W7 in a pro wedge, then a 10w6v2 in a fiberglass corner enclosure, and finally a single 12 in IB through the ski-pass, I can say without doubt that IB is by far the most superior of everything I have tried, it is the loudest, cleanest, easiest and cheapest way of achieving awesome bass in our cars. And I'm saying this just after having heard an experimental setup with an old sub I had. Next week, I'm putting in the real deal subwoofer, I can't wait!