I noticed some distortion with my speaker's sound and upon checking
found out that the surround foam of one unit has ripped. So I removed
all the foam. Then I had one session driving it pretty loud (before
that I was listening at low levels). After a couple of hours, the bass
became noticeably gone. Checking the unit again, I found that the other
unit's surround foam has also ripped.

I'm wondering if there may be some damage to the voice coil or is the
lack of bass due to the missing surround alone.

- Benn