Hey guys! I had an issue with my left ear phone dropping in volume seemingly randomly at times. Often shaking the headphones a bit would somewhat fix the issue but not entirely. The warranty is almost expired so I thought what the heck I might as well try to fix it myself.
I'm happy to report that the headphones are extremely easy to service & repair. The inner construction is very simple. Just make sure to snap photos of every step and also make sure to use the right length screws and screw them in their right place and you're golden. The smaller inner ring screws hold the driver, the longer screws attach to the casing on the outer edges.
In terms of the actual issue I've noticed the two signal wires were twisted and very close to being in contact with each other. The wires that are soldered to the cable plug contacts don't have any insulating material (I mean at the solder point). I don't think that's unusual for most products. But if they were insulated I'd assume this problem wouldn't occur in the first place.
I've just placed some insulating duct tape between the contacts and it seems this resolved the issue. It might have also been a loose contact issue but it's hard to tell.
I've read reports online of other people experiencing similar issues with volume drops. Hope this helps anyone else that has an out of warranty pair and can't get it fixed by DCA for whatever reason.
Edit: Correction about insulating material, I meant at the solder point not the entire length of the wire.