[msturevski]

Hey everyone,
 
I have finally decided which pair of headphones to get and they are the Beyerdynamic DT 990s, but I don't know which impedance of the headphone to get.
 
I'm going to pair it with an ASUS Xonar Essence STX soundcard and I'm not going to buy the 600 ohm version as people say it has a bit too high impedance rating for the card to handle, and that it is too quiet if I do get it with that card.
 
So I wanted to know what is the main difference between the regular 250 ohm version and the 250 ohm PRO version?
 
Thanks.

 

[GotNoRice]

The pro is cheaper, and has more clamping force.  The clamping force results in more bass in most situations.

 

[msturevski]

Oh okay. What are some disadvantages of the PRO compared to the regular 250 ohm version?