There's a very interesting link on Beyer's website that should answer your question and more. Here's the link http://europe.beyerdynamic.com/service/faqs/kopfhoerer.html

This post has been edited by MrJinggles: Apr 10 2011, 04:24 PM

nice sharing.

Just got my DT440... Besides burn-in what should I do with it???

enjoy it? lol

Some other forums suggested to unscrew the screw a little bit... And i opened it just now... there ia a cotton layer on the cover, wonders if i take it off... will the sound quality be better

Oh man...I miss my DT880 when I have a long working hour in office just now...

that comes to personal taste already.. i tried that and dont really like it

you mean the screw or the cotton thing?

i meant the cotton.. it effects the sound presentation quite alot
the screw mod doesnt change the performance of the headset but to prevent the plastic from cracking..

Actually which screw should I loosen?

beside the soft pad on the top of the headband if im not mistaken... there's 4 of them in total. just a slight 30-50 degree angle twist should be sufficient

got it... and done

I am wondering .. are the low end beyers made in germany ?

since the box stated made in germany, I think should be

I've stumbled on this review while doing some research few days ago;

http://www.head-fi.org/wiki/information-so...een-dt770-dt990

Great comparison, even me also not found and compared so many things.

I can easily compare between models of beyers but not between impedances of the same model.that guy probably spends a lot of time listening to them before actually putting all of his observation into that article.

same in this forum thread too.
http://www.head-fi.org/forum/thread/513393...990-models-more

Is it OK to advertise my items for sale here?

It's a beyer.

Do it here http://forum.lowyat.net/AudioRelatedAccessories