I've also replaced the original 6H30 Sovtech tubes in my LS26 with the 6H30-DR. Like every tuning move, the result depends on the other components and I'm not sure that move would please to everybody. If there is some "slack" in the bass of your system, the DR will help with its more compact overall sound, but if your amp is very tight already (my Classé IS tight), you could find it's like too much of a good thing.
The DR also features a stunning contrast between tones of instruments and a better focus. I feel the extreme high frequency area is affected: too tight once again.
The DR also features a stunning contrast between tones of instruments and a better focus. I feel the extreme high frequency area is affected: too tight once again.