How to replace ProCinema ProSub 100 blown fuse?


Novice Member
I have a 20+ year old Definitive Technology ProCinema ProSub 100 subwoofer, and suddenly it’s not working. It’s plugged in but the red light in the back of the unit is not lit.

My only idea is that it has a blown fuse, but I don’t know how to remove it, or even where it is. I think it is the circular button-looking thing on the back of the unit. It seems to have a slot for a flat head screwdriver, but the slot is very shallow. The button pushes in and out a little bit, but doesn’t pop out.

Any ideas how to replace the fuse?

Rock Danger

Distinguished Member
Yep turn it with a flat head screwdriver, it'll pop out or unscrew.

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