Mordaunt Short Alumni Subwoofer not working

jinglejangle

Novice Member
My MS339 Subwoofer lights up and looks to be working but no sound or sound of relays/power-clicks/etc can be heard.

I checked the fuses and they look to be good. Also took some photos of the internal components thinking a blown capacitor or general burn-out might be noticeable but didn't see anything off. (see photos).

Any tips on whether this is salvageable would be appreciated. I mostly want to get it working to sell of my 5.1 alumni speakers.
Thanks!

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shotokan101

Suspended
You sure that your third shot doesn't show damage?
 

jinglejangle

Novice Member
I wondered about that too actually but the way the black molded to the board I kind of thought that was an intentional (but sloppy) glue. Looking now it doesn't look good hah.

I'm guessing that casing is a ferite (sp?) casing to remove any frequency irregularities? Just guessing so as I've seen something similar on stepper motors for 3D printers but don't know speakers at all. I could open that up and try and peel that section off to see if the wires are gone and if the board is damaged.

Are you familiar with the electronics of a sub? Any add'l thoughts or tips?
 

shotokan101

Suspended
I would probably have a look at the other side of that board first for further signs of damage.....
 

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