All Fender® Tube Amps come Factory Equipped with Groove Tubes. They are much easier to replace (no re-biasing needed when replaced with color coded sets). They have improved harmonic balance, longer lifespan, matched gain to distortion ratio, plus a wider frequency response.

New exclusive GT design with special "heat wings" attached to plate for more power, longer life, and better tone. Big bottom, very dynamic, most powerful in it's class. Our own exclusive specially modified power pentode with 15% more power and great overall tone. Big heat sinks attached to the plates keep this one from "sagging" at full power and so…

All Fender® Tube Amps come Factory Equipped with Groove Tubes. They are much easier to replace (no re-biasing needed when replaced with color coded sets). They have improved harmonic balance, longer lifespan, matched gain to distortion ratio, plus a wider frequency response.

Russian made, same as the 5881 you are using now, but when these are matched in our system they are improved. These are a very sturdy and reliable tube. Perhaps the most reliable of the currently made types, with slightly less power and a more aggressive edge when pushed into distortion.

These are the tubes that…

A faithful reproduction of the original General Electric "clear top" tube made on the original GE machines and with many original materials. GT reissue which have a majority of USA components made on the original General Electric machines, the original tools, dies, materials and processing formulas as acquired from the liquidation for the last American tube factory in Owensboro Kentucky.…

Reproduction of a classic EL-34 XF2 Dual Getter tube. This is a classic. The GT-EL34M was shown at NAMM. This tube is based upon a tube which is considered something of an icon to EL34 users in both the audio world and guitar amp world. There were a number of variants of the original tube and GT chose the classic…

New European version with even more response, higher power and warmer tone. Most common low power pentone, popularized in early Vox AC30 amps. Rediscovered by Matchless amps and now currently used by nearly every tube amp company. Quick, soft overdrive distortion, great for recording but usually too low volume for live gigs. GT Rating System: 1-3 (Low) Understanding…