Good DRRI tube
Amp: Deluxe Reverb RI- Replaces: Original Groove Tubes- Typical playing style: Blues at volume 2-3. The amp was dead quite with the Tung-Sol tubes. The amp retained its overall tone, but with less emphasis on initial impact or attack of the notes. To me, it sounded more musical and better balanced [overall]. There is substantial detail and I can hear, more clearly, the affect of splitting coils on humbuckers than I could with the GT tubes. Sweet spot for clean tones happens at 5 on the volume [Fat 50 single coil pickups]. Break up starts at 6 and sounds smooth, but falls apart at 9-10. At ten rather than sound "over-driven" it sounds over-modulated. Conversely, the GT were a bit more harsh, but was very usable at 10. I do not believe the amp is as loud with the TS tubes. Normal playing, for me, is 2-3. With the new tubes it seems more like 3-3.5. Overall, for my playing style and volume, the TS are a better fit than the GTs. Very musical, very nice sound. If you generally play in the 2-7 volumes, these are great. If you really push your DRRI, I would seek another tube IMHO.