The amp was disconnected from it's power source for a few hours before I opened it up.
I have emailed Hsu, it's on their advice I'm taking it apart. They just said to "disconnect amp wire from speaker". Just thought I'd try for some advice here, as it's a fairly common sub, and people here are just so darned helpful; I thought maybe someone here had done this before.
It later occurred to me that the Hsu board might have better expertise, but I just read this board regularly so this is where it first occurred to me to post.
