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How to resolder my DT990's? Please help a soldering noob
Old 14th September 2018
  #1
How to resolder my DT990's? Please help a soldering noob

I am trying to replace the cable/minijack assembly on my Beyerdynamic DT990's and have obviously resoldered the thing incorrectly. When I desoldered it initially I was a bit stressed as I haven't soldered anything in almost two decades and the wires were quite taut so I was afraid to tear them, which resulted in my desoldering quickly without taking note of all the correct solder points.

I have a red, blue and copper (unshielded) wire coming out of the cable and as one of the three solder points is marked red, I soldered red to that, copper in the middle (assume that's ground) and blue on the other side. The two wires going from the left earphone to the right are white and black, and I soldered the white to the same point as red and black to blue (leaving the unshielded copper wire in the middle). I also opened the right earphone to check the solder points on that side and white was soldered to red, so I am pretty sure this must be correct.

Now, with the copper wire in the middle I am getting a mono sound which is very bassy at when panned to one side and becomes a lot more trebly (and less bassy) when panned to the other. I tried switching the blue and copper wires, but what happens now is that I get a mono sound (with a full frequency spectrum) that sounds identical whether the pan is centred or any position on the right side, but fades to silence the more I pan towards the left. I assume there is some phase cancellation going on, but I am very uncertain as to how I should try resoldering now.

Any assistance would be much appreciated!
Old 14th September 2018
  #2
Two seconds on #oogle found me this;

Old 14th September 2018
  #3
Double post glitch

Last edited by Cozmik Prod.; 14th September 2018 at 09:27 PM.. Reason: double
Old 14th September 2018
  #4
Quote:
Originally Posted by Cozmik Prod. View Post
Two seconds on #oogle found me this;

Thanks! That's the one I tried following, though. I couldn't see which wires went where. Good news though, now I have stereo sound, the only issue is that L and R are flipped, but now I know what to do.

This article helped:

DIY Audio Electronics from Zynsonix.com: Recabling a Pair of Beyerdynamic DT880 Headphones
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