I just recently received my hifonics bxi1206d, and installed it with my alpine type r. When I first powered it up the sub very very faintly moved, producing almost no vibrations. The settings on the amp were all fine, all at the 12 o'clock position.
Then I rewired the sub, and now it seems like it's working a little better, but I think something might be wrong with it.
Is there a good way to check? Like a song that has a bunch of frequencies or something?