dt990 rattle
Jun 30, 2008 at 9:08 PM Thread Starter Post #1 of 14
wildcats1121

wildcats1121

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The past couple days my dt990 produces a distinct and very annoying rattle at lower frequencies in the right ear cup only. I have tried disassembling the headphones and cleaning them, however this did not work. I have emailed beyer and they said to send them in. Does anyone have other advice or a quick-fix solution before I spend money to repair them?

Thanks

*I lost the warranty when I moved into a new apartment.
 
Jun 30, 2008 at 9:42 PM Post #4 of 14
Had the same problem.
Cleaning my cans every week keeps me calm.

But, I had me replaced a couple a year ago (when they were only 2 days of use) at my local seller because of it, and he couldn't find the problem either..

So geuss you should try sending them to beyer, ask if there's a chance to replace it no cost added. After all, it's a problem i'm sure Beyer can't solve, they'll vae to replace the cans if in true there is no chance of hair on the drivers/wires.
 
Jun 30, 2008 at 9:45 PM Post #5 of 14
I have the EXACT same problem. Rattle from right cup. Only noticeable on some songs but when you hear it its really loud and annoying. Can mostly hear it on trance songs when only the base is pumping. The sound is still perfect except for the rattle, no other noticeable distortion or anything. Thought I had damaged them by playing to loud. Please let me know if you find a solution.

EDIT: Never mind, found a hair and I think it solved it. Always been to scared to open them up before...

EDIT2: No that wasn't it. Think it got a bit better but still rattle. Should i remove the transducer and try to clean behind it? It looks really fragile.
 
Jul 1, 2008 at 12:56 AM Post #6 of 14
They are fixed!!!!
Apparently hair WAS the culprit. It took a good 5 minutes of searching and another 5 of coordinating the attack with some tweezers. The result was a 2 inch bugger lodged in the driver. My can now sound beautiful again!
biggrin.gif


p1p3: it sounds like you have the exact same problem (i thought mine was loud bassy music too). Check your driver again. I held my driver in front of the computer screen while the room was dark and was able to see the hairs I originally missed.
 
Jul 1, 2008 at 6:34 AM Post #8 of 14
With the Beyers I suggest removing the hair as soon as you notice the rattle, because they can become stuck to the diaphragm and it gets a lot harder to get rid of it then.
 
Jul 1, 2008 at 8:04 AM Post #9 of 14
there may be some other reasons.
please check the shape of membrane. if it is concave,that might be the cause.

i was confronted with the same rattle problem with my DT931, and later i found the problem resulted in the membrane. the shape of membrane shall be a heave sphere. and my DT931 had a concave membrane. obviously the membrane will be in contact with the bottom and that is the reason.
i had my friend Tear off the membrane and restick to the unit. and in China, some friends even retried recovering the shape of membrane through huffing breath.
 
Jul 1, 2008 at 9:55 AM Post #12 of 14
Quote:

Originally Posted by davidxtb /img/forum/go_quote.gif
there may be some other reasons.
please check the shape of membrane. if it is concave,that might be the cause.

i was confronted with the same rattle problem with my DT931, and later i found the problem resulted in the membrane. the shape of membrane shall be a heave sphere. and my DT931 had a concave membrane. obviously the membrane will be in contact with the bottom and that is the reason.
i had my friend Tear off the membrane and restick to the unit. and in China, some friends even retried recovering the shape of membrane through huffing breath.


It's true that the diaphragm can become concave and this can also cause distortion. However, even if you 'fix' it by whatever means, it will have a weakness in the structure due to the deformation. It's worth returning it to Beyerdynamic under warranty when this happens.
 
Jul 1, 2008 at 12:18 PM Post #13 of 14
Quote:

Originally Posted by p1p3 /img/forum/go_quote.gif
Thank you so much everyone. Found the last hair. It was white, probably from a cat or something. This has been annoying me for months.


That's great to hear! Bet it was like a breath of fresh air.
cool.gif


BTW - your avatar freaks me out!
tongue.gif
 
Jun 12, 2014 at 1:33 AM Post #14 of 14
Guys i need your help. I have the exact same problem, i opened the driver and i saw white "hairs" but i think it was part of the driver because they were stuck. I removed 2 of these, but i left one because it was stuck and i didn't want to damage the driver. I still have the problem though... 
 
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