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Left speaker has no bass anymore after removable cable mod.

post #1 of 13
Thread Starter 

Hi all,


I did the "removable cable mod, but I had to remove the the clip that was attached with 3 screws otherwise it wouldn't close well, so now I have no bass in that speaker at all. It is also less loud than the right speaker, is this a plug issue or is it that the speaker isn't attached to the frame anymore? Would it be useful to glue the speaker to the frame?


I hope you can give me some information on this issue.

post #2 of 13

Which headphone was it? Does the volume change on the left side if you wiggle the plug? Some pictures would help

post #3 of 13
Thread Starter 

Whoops, I am using a ATH- M50


Here are some photos of how the soldering is. 




Red is the right speaker
Green is the left speaker
White is the power wire
post #4 of 13

Re solder the green wire. and what 3.5mm plug are you using? Did you make one out of the stock one from the m50?

post #5 of 13
Thread Starter 

I am using the MJ-074N

post #6 of 13
Thread Starter 

This is the wiring on the speaker itself.



post #7 of 13
Thread Starter 

I just broke the green wire and it doesn't matter which side I touch with the left side of the plug, the sound stays really flat and in comparable to the other driver bassless.

It is like the right speaker has a rich and boomy sound and the left one is just only mids and highs...

post #8 of 13

Tbh, the solder joints do look suspect.  The ones on the jack look like cold solder joints.  Make sure your iron is hot enough and clean.  Tough to tell but any chance there's a small solder bridge on the driver?

post #9 of 13

If you are getting sound then I doubt it's your solder work. A short either has sound or doesn't, the same with a broken connection. Low volume and no bass means that your driver and more importantly, it's voice coil, has come too far out of the magnetic enclosure. There are several sweet spots where the voice coil is magnetically drawn even with the power off. It's function is to move in and out along the magnetic pole to produce sound. The problem happens when the voice coil gets out of this sweet spot, it doesn't even necessarily have to be all the way out, just out of the sweet spot and you will lose all bass and it will be very quiet, because it's running in a very inefficient position, like trying to listen to headphones without them touching your head, position is everything to an electro mechanical device like the driver.  This happened to me on my 880's when I was plucking hairs out of the driver and it's easy enough to fix.


1. Try air pressure. Gently blow on the speaker, you're trying to use air pressure to gently re-seat the voice coil. It's like fitting a ring on a metal finger.


2. If that fails, try the direct approach, use your fingers but be very gentle. Use cellophane office tape if you need to pull up on the driver or pop out a bubble or wrinkle.




Good luck.

Edited by Kodhifi - 1/23/13 at 10:44am
post #10 of 13
Thread Starter 

I have no idea how to open the driver, I think it's glued on to the grill. Does anyone know how to fix my voice coil without taking it apart?

post #11 of 13

blowing......That's why I mentioned it because it doesn't require disassembly. You're trying to gently push and pull on the driver using your mouth and air pressure, so it re-seats.

post #12 of 13
Thread Starter 

I blowed everywhere and I did not get a result... Am I doing something wrong?

post #13 of 13

Impossible to say. If you hear the driver crinkle a little then it's working, if that didn't fix it though you either need to open it up or something else is the problem. If you could look at it you would be able to see immediately whether or not the driver had pushed the voicecoil out too far.


I know one way you can rule out a short or electrical problem though, stick a voltmeter on that driver, set it to ohms, and measure the resistance.

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