[johnlowe11]

I was wondering what amp would be best to use for the Sennheiser Pxc 450?

 

[Garage1217]

I use a heavily modified bravo V2... cannot even be called a bravo really anymore with so many mods but it sounds fantastic with my pxc-350's which are 95% the same as the 450. Also sounds fantastic with my HD650's.
 
I have a DIY tube / hybrid coming out in a few weeks that is quite a beast for the cash and would rock your 450's.