Coming from the 6H30Pi (EH, so *theoretically* just a tad better than the Sovtek), the 6H30P-DR brought a truly holographic (3D) soundstage; that was the first immediately obvious improvement, even before burn-in. After burn-in, much better extension, especially in the bass department (200Hz downwards), flying detailed highs and great transients, and a naturalness of timbres and decay that I had not heard before. Not minute differences, but quite major, and that was before I upgraded a few more pieces of gear like my S/PDIF transport and battery power, which made another night and day difference that scaled extremely well with the -DR and CV4015, even moreso with the HE-500 and good CV4014 tubes with more power and thump.
I'll try my 6H30Pi again this week, just out of curiosity when I change my power tubes before shipping them. Just to anti-placebo myself again. I ought to sell my 6H30Pi too, it seems useless to keep them for no reason when they're definitely worth something and close to new...
Thanks for posting your impressions. Appreciated. Interesting, because the negatives of the 6H30P-EV, I found, were a relatively flat stage, the other the lacking sub bass, both seem to be improved with the DRs.
I have heard that battery give cleaner power. What setup do you use and do you use it for DAC and LD?
Edited by Acapella11 - 3/2/13 at 2:09pm