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Groove Tubes Guitar Amp Tubes

Groove Tube 12AT7 Preamp Tube

The 12AT7 is durable and usually used as a phase splitter or driver tube (part of the power section). It is great for most US made amps, especially Fender. Great for Marshall in the driver stage for a cleaner, brighter tone (should be changed ev...

Groove Tube 12AX7, Russian

This new tube from Russia is slightly brighter and lower gain. It offers quicker compression than GT 12AX7. Great for most Fenders, but may not be well suited for high gain Fender type amps (such as Boogie).

Groove Tube 6L6B Duet, Russian

The 6L6B is perhaps the most reliable of the currently made types of 6L6s, with slightly less power and a more aggressive edge when pushed into distortion. These are currently used for the GT Fender amp tubes.

Groove Tubes 6L6B Quartet, Russian

The 6L6B is perhaps the most reliable of the currently made types of 6L6s, with slightly less power and a more aggressive edge when pushed into distortion. These are currently used for the GT Fender amp tubes.

Groove Tube E34LS Tube Duet (EL34)

This new exclusive GT design features special "heat wings" attached to plate for more power, longer life, and better tone. The 1st choice of Matchless and many pro players including Billy Gibbons, Joe Perry, and Joe Walsh, these tubes are very d...

Groove Tube E34LS Tube Quartet (EL34)

This new exclusive GT design features special "heat wings" attached to plate for more power, longer life, and better tone. The 1st choice of Matchless and many pro players including Billy Gibbons, Joe Perry, and Joe Walsh, these tubes are very d...

Groove Tube EL84 Duet, European Tubes

These tubes are good quality, long lasting type with a slightly aggressive edge when pushed into overdrive.

Groove Tube EL84 Quartet, European Tubes

These tubes are good quality, long lasting type with a slightly aggressive edge when pushed into overdrive.