I am not sure what exactly is wrong with it. Sounds like a rattle or scratching at a certain point. I tried it in parallel with another sub that works well, and that scratching noise happens on both subs. Maybe something is causing the speaker to lose it's connection in the sub at certain excursion points for a very short time? If I move the speaker by hand when it's not being powered, I don't hear any scratching noise.
Any way to remove part of the speaker like the spider or what else I might want to check and then reattaching it?
Or are there any other uses for it, like I don't know as a passive radiator or find a recone kit?
I hate having something that seems like it should be fixable or used to just be thrown away.