Is it clipping? Took the sub out, and it still made that sound on lower volumes. It's not bottoming out for sure, but what the hell can cause it? I'm using the same box and amp that I had in my old car, and it worked like a charm then.

Is it sealed?

yeah, it's sealed. 2.0 cu ft net.

what amp how much power you runnin?

Arc Audio 1500-XXK. I have it bridged @ 2 ohms. The amp is rated at 1k watts @ 2 ohms bridged, but it's a bit under-rated. Thing I don't get is, that the amp + sub combo sounded awesome in the old car, and never had this issue until recently. my gains are set about halfway, and the box completely sealed without any air leaks.

Edited April 4, 200619 yr by carguy83

Have you checked the gains with a DMM?