i killed a DT990 driver :'(
Feb 17, 2008 at 11:10 AM Thread Starter Post #1 of 14
li0n

li0n

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If you're wondering, those aren't burn marks around the plastic its some sort of a glue. I was so sure that i prevented heat from getting into the drivers. That said, i'm not sure how it died, i.e if it died on the spot or if it died in the cupboard while i was buying the rest of the stuff i needed to do the re-cable.

Anyone know where i can 'buy' drivers? Because I have no idea what I can do now. The driver is definitely dead, (other one is fine). What are my options?


anyone selling their 990s? :p i got the old pro version in case you cant tell from the picture
 
Feb 17, 2008 at 11:55 AM Post #4 of 14
Sorry for your loss!
I am sure beyerdynamic will help you out though.
 
Feb 17, 2008 at 12:07 PM Post #5 of 14
I'm not sure about the helpfulness of Beyerdynamic there. I have tried, a few times in the past, to contact their US, UK and Australian offices just to source a set of earpads. While the UK office was kind enough to provide an Australian contact detail as well as service manuals for the headphone, they implicitly told me they do not sell outside their country of responsibility. The US and Australian offices never even replied to my numerous e-mails.

To the OP, did you check if the headphones were working prior to the recable? It will be very hard to source a replacement driver given my experience trying to contact their representative as well as the age of these headphones. If you are really serious about getting an exact replacement, there is currently a pair (the old-school one) on that auction site.

Regards.
 
Feb 17, 2008 at 1:07 PM Post #8 of 14
Quote:

Originally Posted by d-cee /img/forum/go_quote.gif
Maybe try contacting Beyerdynamic spare parts department

p.s you wouldn't happen to be an oldschool CSer from Australia would you?


Yeah i am li0n, hi dc
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ok well update

i managed to fix the driver, I don't know how i did it, but i kept soldering on and on without the alligator clip or whatever i used as a heatsink, i saturated the whole base with solder then reapplied everything and out of nowhere i just started hearing sound!


cheers for all the replies!

images of my first re cabling experience

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and my attempt at a Y split haha
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I was experimenting with different sized heatshrinks hence the really crappy fit on my actual connector.

Overall i love cotton, really comfortable fit. Sound-wise ? my EE background tells me that it is all placebo^_^

yipee
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admins can close thread or whatever need be
 
Feb 17, 2008 at 1:18 PM Post #9 of 14
what might have happened is a voice coil wire, which attaches to the solder post, either got broken off or desolder itself.
Then when you applied a lot of heat and solder, the wire re-attached (if it was broken off, then the insulation coating got melted off and allow solder to stick to the copper).
 
Feb 18, 2008 at 1:24 AM Post #12 of 14
For those wondering, Audio-telex is the Australian distributor for Beyerdynamic, and you can get a new pair of drivers installed for around $140 (if memory serves). They won't sell you single drivers, though, and for good reason (they need to be matched).
 
Feb 18, 2008 at 1:33 AM Post #13 of 14
Quote:

Originally Posted by d-cee /img/forum/go_quote.gif
What

are those resistors there to affect impedance?


Iirc they are diodes that operate when the voltage is high enough, so that the drivers don't get damaged.
 
Feb 18, 2008 at 2:47 AM Post #14 of 14
Quote:

Originally Posted by li0n /img/forum/go_quote.gif
i managed to fix the driver, I don't know how i did it, but i kept soldering on and on without the alligator clip or whatever i used as a heatsink, i saturated the whole base with solder then reapplied everything and out of nowhere i just started hearing sound!


Way to go. It's all or nothing!
biggrin.gif
 
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