Is the GT6L6-R2 is a SED WINGED "C" 6L6?
Here's the description from their web-
Here's the description from their web-
The latest Russian offering from the "other" factory located in St. Petersburg Russia and also found marketed under the Svetlana name. It has a tight bass response, bright top end, not as harsh as the more common 6L6's from Russia in the past.