JBL Sub 125a
 

Hello everyone.
I am opening a JBL powered subwoofer model sub125a. The problem is
that sound level was reduced to about half and I have no idea yet where
to look. Any clue / idea / hint would be very much appreciated.
Thank you very much.
Bobby

Does the speaker have dual voice coils? If so, one of them may be open... check
speaker connections; one pair of connections per winding on the back of the
speaker.

do ya have a DMM to check out the speaker