Groove Tubes has been manufacturing, importing, and grading quality power tubes for two decades.  Fender tube amps now include Groove Tubes as standard equipment, and true tube aficianados worldwide swear by the tubes and pro audio products Groove Tubes makes. For premium tube tone, choose Groove Tubes!

The Groove Tubes GT-6L6R Power Tubes Duet gives you what may just be the most reliable of the currently made tubes, with slightly less power and a more aggressive edge when pushed into distortion. Russian made, these tubes are the same as stock 5881 power tubes, but they're specially matched by Groove Tubes, resulting in a better sound and higher reliability. Fender uses the GT-6L6R in their non-Custom Shop tube amps, and for good reason: They sound great and they're very dependable!