I have not gotten my alpine speakers yet but I did get the iawa and did a quick test. I haven't done a lot of adjusting (the iawa) has an equalizer but it sounded too boomy. But it also has this battery saver mode that cuts out the more energy consuming movements to the subwoofer and in that mode it sounded pretty good. It nearly doubles the battery time to boot. Out of the car in the house it sounds good in the normal mode. I think with the alpine it's gonna sound pretty good. Not as good as a full retrofit with amps and new head but way better than stock I'm more of a midbass myself and it could be a little better on that but maybe I need to fine adjust. In the car in this low energy mode I'm guessing I should get the 18 hour battery time for sure.