Tweakers' Asylum

RE: One headphone channel out, but both channels measure the same...

98.247.132.28

Ugly

In Reply to: RE: One headphone channel out, but both channels measure the same... posted by Duster on July 11, 2018 at 13:39:59

maybe a mechanical issue? ie if the cone can't move because it's being blocked by some debris in the gap for example...You'd presumably still measure the same thing with an ohm meter but may not get any cone movement by putting current through the voice coil.

Follow Ups:

RE: One headphone channel out, but both channels measure the same... - Duster 20:05:02 07/11/18 (3)
The headphone cups are perfectly sealed, so it's doubtful that a mechanical issue is the problem. What I need to do next is configure a cable that allows me to hook the cable directly to the right driver to hear if it actually produces the signal.
- I agree the most likely is a physical blockage/misalignment of coil - toothpaste 07:44:55 07/12/18 (1)
  The coil may have come apart from the surrounding parts as well as a bit of something coming unglued and blocking the function of the driver.
  
  I find giving stuff a good wack helps if all else has failed..
  If it is something blocking or come unglued, a wack might free it up.
  Last resort stuff.
  - RE: I agree the most likely is a physical blockage/misalignment of coil - airtime 13:33:10 07/12/18 (0)
    I had a pair of Koss (going back to the 70's here) where the coil hung up on something. Tested OK but didn't work. I don't remember how but apparently I did get them working again somehow???
- RE: One headphone channel out, but both channels measure the same... - Ugly 06:08:29 07/12/18 (0)
  Being sealed would keep out foreign debris but wouldn't prevent the potential for internal failures, by whatever mechanisms, from causing some mechanical interference.

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