Originally Posted by
SMKSoundPro
I have been reconing JBL professional speakers for over 25 years. The shop I worked in and ran specialized in Fender amp refurbishing and hot-rodding.
I have literally reconed thousands of 120s, and I believe that it is best to have a JBL approved reconing service do the job with real C8r120 kits, or c16r120 kits for two in parallel.
I sent a E120 with a ferrite magnet to JBL Customer Service because of a shifted pole piece. They said it was not shifted? and reconed and sent it back. It is in perfect shape from the factory and sittng here as a spare for my 4602a Cabaret monitors. All told though, I have got over $350 in that one speaker.
The point is to STAY AWAY from aftermarket 120 kits. I think they are the wrong tool for the job.
Good Luck.
Scott.