Groove Tubes GT6L6S Tubes

Add some muscle to your amp with a set of GT6L6S power tubes. This medium rating set is available as a duet or quartet, and is perfect for all-around use.

A medium-output power tube (generally 20-25 watts) often used in Fender(R) professional amplifiers including the Bassman(R), Bandmaster(R), Concert, Dual Showman(R), Hot Rod(TM) Series, Pro Series, Super Reverb(R), Tremolux(TM), Twin, Vibrolux(R), Super-Sonic(TM), Blues Deluxe(TM), Blues DeVille(TM) 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 '60s onward.

Great dynamics and a very sweet, punchy tone with enhanced power rating and performance. More brilliant top end and a very full, pronounced and round low-frequency output. A solid replacement for stock performance.

Matched pair of 6L6-S tubes rated from power range 1-10. Each duet has a specific rating (i.e. R2, R7, etc.) and is matched and biased to a specific output level.


- Power Tubes
- Duet of 6L6-S tubes rated from power range 1-10
- Each duet is matched and biased to a specific output level (R2, R7, etc.)
- R1-R3 = Low: Early distortion, wide range, softer attack good for Rock and Blues solos.
- R4-R7 = Medium: Normal performance, great dynamic range/attack and best all around rating type for all styles of playing
- R8-R10 = High: Most dynamic range, most clean power/less break-up for power players, Jazz and bass amps.

Dimensions and Weight in Packaging
Duet, Medium Rating
Shipping Weight: 0.31 lbs
Shipping Dimensions: 5 x 4 x 2 in
Manufacturer Part Number (MPN): 5550113521
Quartet, Medium Rating
Shipping Weight: 0.88 lbs
Shipping Dimensions: 7 x 6 x 5 in
Manufacturer Part Number (MPN): 5550113524

For support or warranty questions, please contact the manufacturer:
Phone: 800-459-5687

Duet, Medium Rating

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