RAL is Revelation Audio Labs - see Senn threads of 2-5 years ago - a superb cable with Senns, but pretty expensive now.
A used Primare dual mono, balanced amp is hard to find at a good price... and... like the "vintage amps" is subject to the cost of updating and maintenance.
One of my requirements is... the amp must be able to power other phones well, and not be dedicated solely to one set / type of phones.
I'm sure the HE-6's with the right setup (dedicated speaker amps) sounds fine... but... I am unwilling to pay the price for the phones and dedicated setup... just... as I'm unwilling to do so for the 007's. Though, I am a bit skeptical that the "thick, syrupy lower mids" can be completely eliminated by sufficient burn in and the right speaker amp. Regardless, I'm unwilling to invest the money required to "get there," just as I am for the 007's.
And... again... I just can't appreciate such subtle improvements in sound, at disproportionate investments in equipment.
And... yes... as great as the WA6 SEm sounds with a variety of phones... I find... much less costly amps sound nearly as great (e.g. my Millett MiniMax for example). I violated my own principles with my investment in the WA6 SEm, and the related tubes.
These lessons took me several years of "experimentation" with a number of headphones and setups to learn - but, learn them I did. Others will not "get there" without similar experimentation. And... some... may nevertheless, appreciate such subtle nuances in sound quality, at astronomical prices. And... I'm still tempted from time to time. However... whenever I'm tempted to "fall off the wagon" again, I think about my utter surprise at the sound of the 007's I've owned with various amps, and the HE-500's - which, left me amazed that anyone would make the investments required - simply amazed!
Edited by Gradofan2 - 1/9/12 at 2:21pm