Pahini said:  "Part of the HA-2 experience as well, is just actually holding it in your hand.....it is so well built, it's a first-class piece of equipment from top to bottom. It feels solid, it looks elegant, the leather covering caresses :) It's expensive, and it feels expensive."   Agree...

  Forgot to mention that I use the bass boost much of the time I am listening.  It is not a typical bass boost, "loudness control", sort of thing.  Much much better.  It gives the bass a slight boost without ruining the mids and above.  I worry that when I go to a desktop I will need to find a...

  yes, I use what they call the "hifi" files which are apparently hi-res files.  Between Tidal, HD 600 and the HA-2 I am enjoying the tunes.   Thanks for the recommendation of the TX-X00 and 650.  At this point I am amazed at the bass that comes from the 600.  Yes, I could use more....lol  ...

Full disclosure: I have gotten into headphones very recently and have only heard the HD 600 through the HA-2.  This makes my feedback somewhat limited but here is what I would say.   I love the sound.  I had no idea that a headphone could sound so good. The clarity and presence is stunning...

Thanks DeadHead57 -  Great to hear that that combination is working well for you.  I am steering clear of the crack since I am not a "kit" type.  I remember my brother and father (both EE's) back in the 1960's loving the Heathkit stuff and building some cool projects.  It was clear that they...

Thanks very much Bob.  Really appreciate the feedback.  Indeed.  I rememeber the Dynaco's and the Mc's!  

Thanks Bill, appreciate the good info.  Fascinating that the solid state needs to be warm also. I had not heard that and had figured that it was a binary off or on scenario. Interesting.  I have wondered about the more expensive schitt amp the Mjolnir 2.  It's considerably more expensive but...

Thanks for this Bob.  I am on the verge of buying a Valhalla 2 and Bifrost to pair with my hd 600.  I've never had a tube amp, at least not for the last 40 years (yes, an old Fisher I wish I still had...) and I wonder whether I should stick with SS..I am guessing I will be leaving this on for...

  Also looking for an amp. At this point I am using the HA-2 with the HD-600 and am very happy but wondering if things can get even better with a desktop.  Would love to hear from those who have experience with this.  BH Crack seems to have quite a following would love to hear more from others...

  I would urge you to consider the Oppo HA-2.  It is portable and pairs very will with the HD-600.  I have both and love them. 

Thanks UBS28 -  Actually I am very pleased with the 600's and was just asking for ideas about upgrading.  Raybone suggested the 800's and I was curious to hear what sorts of improvements one might expect. 

Thanks Raybone.  That's a direction I wasn't considering.  Interesting.  I hadn't heard much about the 800's.  What kind of improvements would I hear?  I use two subwoofers in my regular system and have grown very used to deep bass.  You don't get that with the 600's and I am guessing you don't...

I've had my hd-600's for a couple of months and am very, very pleased.  I really didn't know that sound of this quality could come from headphones.  I have played a number of musical instruments, mostly percussion, and am pretty picky when it comes to sound quality.  These things rock.  I have...

I am fairly new to headphones but not so new to good sound reproduction.  These forums helped me to start off with the HD-600 and I am very appreciative for this.  After a short break-in period they have sounded stellar.  I was listening mostly via my imac via the 3.5 jack.  The sound was good...

Thanks.  That's makes much more sense.  I didn't even know that you can use a usb out from the mac.  I have some learning to do.