Groove Tubes Gold Series GT-6L6-R Matched Power Tubes Medium (4-7 GT Rating) Duet


Description
These are the tubes that are used by Fender in amps that use 6L6 tubes and DO NOT come from their Custom Shop. These are used in the Hot Rod series, Blues DeVille series, Pro Tube series, BF reissue series.
The GT 6L6GE is used in the 57 Tweed, Vibroverb and Vibro King amps.
If you are trying to match your stock tube rating with the GT rating:
On Fender amps, output tubes in newer amps are color coded. The scale is:
Blue = GT 1-3 rating
White = GT 4-7 rating
Red = GT 8-10 rating
Low, medium, and high style descriptions refer to break up modes of the tube for an overdriven guitar signal. High-rated tubes break up slow and have the highest amount of headroom, while low-rated tubes break up easier and have the least headroom, yielding a heavier, harder distortion. Medium-rated tubes fall in between.

Specs
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Reviews
4.2
5 Reviews
50%
of respondents would recommend this to a friend
- Concerts1
- Practicing1
- Hilariously microphonic1
- Not Functional1
- Overpriced1
- Poor Quality1
- Professional Musician2
- Easy To Use2
- Functional1
- Good Quality1
- Improves Sound1
Reviewed by 5 customers
Sonically bland, yet microphonic
submitted3 years ago
byLee
fromUSA
Never cared for Sovteks (what these are), as they have all the sonic character of a potato buried in Siberian permafrost, but I've never had a bad one out of the box. Picked up a matched pair that GT rebranded and "tested" at an upcharge to find one was wildly microphonic. Yikes.
Groovy
submitted6 years ago
byRay Ray
fromSt. Louis momo
I need replacement tubes for my Traynor 80watt amp so I got the 6L6 equivalent tubes sounds awesome, great clear and mellow tones and the break up starts at a decent volume.
Cleaned Up My Hot Rod Deluxe III
submitted13 years ago
byRon Lucas
fromCastle Rock, CO
I purchased the Fender Hot Rod Deluxe III knowing it had a clean channel and dirty channel. I use pedals into the amp through the clean channel, but at volumes higher than 3 or 4 on the amp, it would start to break up. I called Fender who confirmed the stock tubes are rated between 4 and 7 which break up that early. So they recommended these tubes rated between 8 and 10. I got the 10. After installing and learning how to re-bias the amp on YouTube, the amp plays very clean when cranked up to 8. Works as expected.
Once you go G, you never go B.
submitted14 years ago
byChris
fromColumbus, OH
I use a 7 rating in my Mesa Dual Rectifier and they sound phenomenal. I've had the same pair in for about 2 years through a LOT of touring, and i'm just NOW starting to see a difference in tone and quality. I play more of a pop/rock style and these tubes help really fill out the mix on stage. They are so versatile! i can have a great low gain tone for a more indie sound, but also a great heavy sound for the hard breakdowns. I definitely recommend these. These tubes along with the GT Russian Preamps, great combo!
Great product
submitted15 years ago
byLightning scott
fromIndiana
I'm an old 80s heavy metal guy.I've used sovtek tubes for years the night before a gig I blew a tube so I went to guitar center for some replacement all they had were groove tubes(wasn't sure about them heard some so so things about them)so I bought them. I got say that I'm very impressed the tube are so warm sounding in my jcm900 Marshall it blew my doors away don't know why people talk bad on these tubes I would highly recommend them!
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Q&A
Have a question about this product? Our expert Gear Advisers have the answers.
submitted5 months ago
asked byHKRichter
fromAsheville, NC
Does Fender still test for microphonics on its Groove Tubes?
I’m sorry, I don’t know.submitted2 years ago
asked byGreg
fromMacon, Georgia
I have a Fender Vibrolux Reverb amp. It has two GT-6L6-S power tubes. Can I use the GT-6L6-R matched tube set for this amp ?
Yessubmitted2 years ago
asked byMary
fromLafayette, LA
How many tubes are in this. Is it a kit?
Twosubmitted3 years ago
asked bychristopher
fromSanta Rosa Ca
Is this price for a matched pair or for a single tube?
Just the one.