A medium-output power tube (generally 20-25 watts) often used in Fender professional amplifiers including the Bassman, Bandmaster, Concert, Dual Showman, Hot Rod Series, Pro Series, Super Reverb, Tremolux, Twin, Vibrolux, Super-Sonic, Blues Deluxe, Blues DeVille and others. Available in many variations, its response is round, with a pronounced midrange character; strident and chesty with a super-bright and clean, powerful punch. Perhaps the most recognized signature tone for U.S. guitar music of all styles from the ﾒ60s onward. Stocked in ﾓmediumﾔ power ratings; also available as special orders with ﾓlowﾔ and ﾓhighﾔ power ratings (please contact customer service for these). Available as singles, duets, quartets and sextets.
Solid and consistent performance; very sturdy and reliable. AKA 5881.
Matched quartet of 6L6 tubes in ﾓmediumﾔ power range.
IMPORTANT BIAS NOTE: If you're replacing a tube with the SAME TYPE of Groove Tube (tube model and rating), you do not have to rebias your amp. In any other case, you should always have a qualified amp tech reset your ampﾒs bias whenever changing your tube type or rating number.