Quote:
Originally Posted by
sysfail 
Cool thanks. I was also reading about the Kees Mod on the PRO 900. Is it a mod that's a must? I really don't like to open up headphones, but if it makes a world of difference I'd do it. You basically put electric tape to cover up the holes?
I hate to say it, but no. I greatly prefer stock.
After burn in, the Pro 900 sounds like a Kees modded "out of box" version anyway.