Oh yeah, forgot why I even wanted to post right now..
Did about a 1 hour test of adding the E9 AFTER the Mixamp.
YES, YES, AND MORE YES.
Again, incredibly neutral, and does not color the sound whatsoever. However, it does make my K701 and DT990/600 sound fuller than the Mixamp alone (obviously as now they are being powered more than enough). It does NOT affect the soundstage and positional accuracy negatively, nor does it degrade SQ because of adding an extra chain to the audio link from my consoles to the headphones.
How would voice chat fare with a 600ohm Beyer or K701/2? Let's just say that even if I have my Mixamp's game/voice knob at 3' o clock (which literally zaps game audio out of like 90% or more of it's volume, and gives voice chat a ridiculous amount of volume), the E9 can make the game audio STILL sound VERY loud, more than I'd like even when I don't use voice chat, so all you people wanting to add a mic to the K702 or 600ohm Beyer with their Mixamp is more than okay to do so with the E9 on high gain and relatively high volume.
Mixamp: 3 o'clock is pretty well past what I'd use my voice chat setting on (1 o' clock). The Game/voice knob goes between 7 o'clock to 5 o'clock. Anything past 3 o'clock is pretty much overkill for voice chat, so the E9 is well within limits even on hard to drive headphones.
The E9 pairs VERY well with the Mixamp. End of story.
I'm am officially 99.9% satisfied with my E9 as both a music amp and power amp for my headphones when using the Mixamp.
Oh and I'd like to quite someone on Head-fi when comparing the E9 to the Bravo V2.
Originally Posted by TheGame21x
I haven't had much time to sit down and listen to them side by side but with the stock tube in place, the E9 is the better amp if you're after total neutrality. I couldn't bear to listen to my M50s with the Bravo because of its harsh over-emphasized upper midrange and treble but, of course, this isn't an issue for the E9 because of its flat and uncolored presentation. The Bravo is a good amp on its own but due to the coloration that tube amps impart on the amplified sound due to their inherent design characteristics, the E9 is more flexible in regards to pairing with sources and headphones. Based solely on that, the E9 is my preferred amp at the moment but the two are too different in terms of design and sound character to simply say which is objectively better than the other.
Just thought I'd put that up in case people wanna see the difference in these two great priced amps...