My primary amp for them is Graham Slee Solo Ultra Linear and if the record quality is decent, they are good, more even with high quality, simply wonderfull. Through my Cary they are at almost the same level, having a little differ coloration, but I cant say mids or highs are better / smother, most probably depends on tube amp and tubes you using. Also, Cary have much more difficult time to drive them with enough power, cos his current much lower than from Graham, but if you listen to the high quality records, it have enough juice as well.
They are on their 160 hours and still have enough to go. For burn in I am using a very cheap CD player/radio that hanging on the wall of my kitchen and to my surprise, this CD player have very good headphone output quality and Q701 are having much more fun through it, but again, depends on what you are looking for and I believe if you give them warmish source, they will sound that way to.
Has anyone tried these with an amp that has a really high output impedance?
People claim over and over that anything above say 5 ohm will make them sound awful.
I have them connected to my old Technics receiver from 93 with a 330 ohm output impedance and they sound just like they should
Even my DJ100 which is 30ohm and portable is fine with it. My KRKs are ruined though. I guess it depends on the headphone.
The Q701 from this receiver is a tad thinner than from my E9 and Micro though, but sounds fairly good.
Right now it's ODAC to receiver. Somehow the soundstage does seem a lot larger somehow.
I got this receiver from a thrift store and it's in perfect shape. That may be a good way for some to find a cheap way to drive a Q701.
It doesn't always work that well.
This receiver does sound a lot better with my HD-600 though.
I really wonder what a Q701 sounds like with a tube amp or even a hybrid tube amp. My guess is a lot fuller mids and even smoother treble. Never tried a tube amp before.
Maybe when I get more money I'll buy the Bottlehead Crack and get an HD-650.