Produced for Groove Tubes by Svetlana, it has a linear even tone, similar to orginal Sylvania tubes which is what it is patterned after. Slightly less power than the 6L6S, but more gain and better top end than other Russian 6L6's. A great tube for Fender amps. 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.
