1TrickPony
Headphoneus Supremus
as time goes, I think most of us are appreciating the greys; the balanced clear presentation and I personally love the vocals on this one.
I still haven't decided if I like the blue or red backs with the grey...source dependent for sure too
maybe I used the wrong back filter with grey.
But too my ears the Black/Gray combo just hit me in the face with too much bass and mids, YMMV. I just keep going back to Black /Black. I guess its the balanced, smooth and detailed sound(very nice soundstage not the most 3D though.
I could see where you're coming from. source/power/gain can really push things forward, aside the physical properties of the A4. it's always nice to have options!