Hi all, wasn't sure where to post this.
Have done a bit of googling but was hoping on some direct opinions and advice....
I bought a job lot of 6 JBL 2226s, second hand, for a decent price. The guy seemed honest, was doing me a deal on a bunch of stuff, said he had tested them etc. Consumer advice not neccesary, Im aware I did take a minor leap of faith.
They then sat around for a while in my (nice and dry) workshop waiting for some cabs to go in, which I have finally built a couple of. And now I have a job for two of them, so i loaded one into each cab, and was excited to hear.... nothing. Spent ages troubleshooting the amp and cables, but turns out the drivers show an open circuit on the multimeter. Tested the rest and 4 out of 6 are showing open circuit! Cones all move freely and without crunch, terminals all look ok and generally they are in decent enough shape. So, whats likely to be going on here? Broken connections to the voice coil? What can I check and repair?
Apologies if its a basic question but im hoping they can be salvaged
Many thanks!
Fen
Have done a bit of googling but was hoping on some direct opinions and advice....
I bought a job lot of 6 JBL 2226s, second hand, for a decent price. The guy seemed honest, was doing me a deal on a bunch of stuff, said he had tested them etc. Consumer advice not neccesary, Im aware I did take a minor leap of faith.
They then sat around for a while in my (nice and dry) workshop waiting for some cabs to go in, which I have finally built a couple of. And now I have a job for two of them, so i loaded one into each cab, and was excited to hear.... nothing. Spent ages troubleshooting the amp and cables, but turns out the drivers show an open circuit on the multimeter. Tested the rest and 4 out of 6 are showing open circuit! Cones all move freely and without crunch, terminals all look ok and generally they are in decent enough shape. So, whats likely to be going on here? Broken connections to the voice coil? What can I check and repair?
Apologies if its a basic question but im hoping they can be salvaged
Many thanks!
Fen
Open driver could be a number of things. Broken wire between terminal and voice coil. connection broken at either end of that. Open voice coil.
You can overload a voice coil, too much power for some time. Burns it up. This often leaves darkened or discolored voice coil wire or former. But you can also burn out a voice coil by a sudden large peak. Say dropping the mic on a hard floor. That often leaves no visual clue.
You can overload a voice coil, too much power for some time. Burns it up. This often leaves darkened or discolored voice coil wire or former. But you can also burn out a voice coil by a sudden large peak. Say dropping the mic on a hard floor. That often leaves no visual clue.
Great thanks. So I guess next question is, should I begin diagnostic surgery and open them up to look, broken connections sound relatively easy to sort... there’s no bad smells or signs of stress from the outside
Short answer: look sideways under strong light to check for broken tinsel leads (flexible wires leading from terminals to voice coil), only somewhat user-repairable part there.
If not, it´s recone time, period.
No real need for original (expensive) kits, there are good quality aftermarket parts available, but in principle reconing should be made by a Pro.
https://www.ebay.com/itm/292746045448
In any case watch 1000 YT reconing videos before trying yourself, and buy one extra kit in case you botch it the first time.
Forget about messing with a strong Epoxy glued aluminum flatwire ribbon voice coil (even if you can reach it without destruction,you can´t solder it, go figure)
If not, it´s recone time, period.
No real need for original (expensive) kits, there are good quality aftermarket parts available, but in principle reconing should be made by a Pro.
https://www.ebay.com/itm/292746045448
In any case watch 1000 YT reconing videos before trying yourself, and buy one extra kit in case you botch it the first time.
Forget about messing with a strong Epoxy glued aluminum flatwire ribbon voice coil (even if you can reach it without destruction,you can´t solder it, go figure)
