i have a circa 90s JBL gt82 dual 4ohm voice coil sub with one of the VCs burned out, it gets no power, and was wondering if anyone here knows how to repair VCs? is it even worth fixing?
The problem you run into is bonding. As an exampe if you bond a brick with porter you can't use the brick again in a structrual sense because it just won't work since the cracks and surface is just flooded with this particular bonding material. The same goes with speakers it's bonded in many different places and you'd have to undo those to replace it. Really it's probably going to be more of a pain than it's worth. Really though if it's just you wanting to because you can go for it. But you will find the bonding issue a bit tricky to get around.
Also, will the cone move up and down? If not then it's fused. I've done this to fry some speakers to get some better ones ^.^
yeah the cone'll move but one side doesnt get power. i guess ill just use this one for some bs project and get some more.
If it does move then atleast it's not fused, however, the coil may simply have a bad spot in it. There are 2 reasons that happens.
1. It was bad from the factory. I.E. the metal used to make the coil had an imperfection in it somewhere that got thorugh the QC.
2. It simply had a spike in Power for some reason that burned the sub on that side. Now this is really just an off shoot of the first reason.
Another problem may be a short somwhere in the coils. When you put a ohm meter to the coils are they 2 different values? If you get infinit/Overload for the resistance there's an open circuit somwhere in there and if you get zero resistance theres a short.
funny i use old motors for door stops in my shop the metal doors stick nicely but they don't move if or when you pull it closed cuz they are heavy
but any woofer can be reconed just need parts that fit the motor
most any Speaker uses standard size parts
if you do some searching there are lots of guys out there that do it if you cant find a trustworthy one pm me ill refer one that does stuff for me