I bought a pair of these on ebay for £8 + £5 P&P but when they arrived the volume controls in the cups are damaged - on asking the seller they haven't been used for years but were supposedly working when last tested.
I opened a cup to find more wires than I was expecting (see pic below, I assume the yellow and one of the black wires go to the second driver on the front) but everything makes sense so I shorted blue to brown on the PCB leaving the pot attached, and compared it to the other ear (which is also dodgy but usable) and it sounds much worse - most the shimmer has gone from cymbals.
Can anyone more experienced comment on how I should bypass the pot (or tell me it needs to be there) or whether a dead resistor or cap could be the culprit?
I guess it could be that the tweeter has died, and the woofer is actually full range but quiet/bad at highs?
I don't want to spend more if the drivers are damaged but don't mind doing so if they're fixable.
Thanks in advance for any help