[Gladzilla]

besides the astro mix amp what would be needed to power these beast

 

[Gladzilla]

looking at the senn 598 and the q701 tough decision  

 

[ruuku]

if possible try reading through http://www.head-fi.org/t/534479/mad-lust-envys-headphone-gaming-guide-updated-11-12-12-sennheiser-hd650-added for comparisons/reviews on both the Q701 and 598s (and MANY, MANY others.

Regarding amping the Q701s, http://www.head-fi.org/t/582276/q701-appreciation-thread.

Personally I'm using a Matrix M-Stage after the mixamp with great results.

A search next time will yield instant gratification, these are an often talked about headphones...

 

[Gladzilla]

i do research these things

 

[jasonb]

I use a Fiio E17 on mine and I find it to be plenty. What is also nice is that it has a DAC, and bass/treble controls.