So some time ago I got the Sony MDR-7520 and as everyone knows they are aimed towards professional applications, but not limited to mixing, tracking and in general applications where hearing details and balances between instruments is important in order to make informed decisions.
That is the reason why I got them in the first place and they did not/do not disappoint. The sound is rich, trustable, balanced and it is easy to apply changes whilst mixing that translate well to my main monitors.
Now here is the problem.
The left earcup is exhibiting this faint buzzing/rattle/port farting noise/material vibration at low frequencies around 50hz-200hz (didnt figure it out exactly with frequency sweeps but might do if there is enough interest). - on my 7520 this happens around 80hz-90hz
Here is the link if you want to check yours - http://www.audiocheck.net/audiotests_frequencychecklow.php
When I first heard this I thought it was due to a cable in my studio going bad. After I eliminated everything in the chain prior to the sound hitting the phones I could not stop noticing this noise.
Imagine this situation: Mixing late at night (cant use monitors) and working on drums, the kick specifically. It is sooo annoying because of the noise!
I already contacted a fellow Head-Fi-er (a_recording) who mentioned having this problem on his Sony MDR-Z1000 and after saying that he managed to sort out the problem by moving the cable around, he has confirmed that in fact the problem is still there.
That thread and my post is here: http://www.head-fi.org/t/510768/mdr-z1000-new-sony-flagship-headphones/1575#post_9182198
I tried moving the cable around in a few different configurations as well as taping the cable to the cup to no effect. One idea that I have and which I have not tested is that it maybe has to do with the little paper like material inside...
Please get involved guys as I would hate (im sure just like everyone else) to feel like I have been cheated out of a lot of money and not getting what is expected. Lately ive been quite protective of my investments and I will not allow Sony (or the dealer) to get away with this :)
If we find a fix that's great of course :)
Take care and happy listening!
Edited by msflsim - 2/21/13 at 5:59am