Groove Tubes 6CA4, a favorite tube in lower-wattage amps from Marshall, Vox, and 65amps, the Groove Tubes GT-6CA4 Rectifier, also known as the EZ81, is a quality replacement tube when it comes time to service your amp. This tube was also commonly used in 1960s student and practice amplifiers.
For over 30 years, Groove Tubes have been trusted and demanded by touring professionals and their techs around the world. Groove Tubes started in southern California, and through innovative design, rigorous selection and testing, GT-powered amps have rocked the world in some of the most famous rigs ever played from studio to stage. Combining their passion for music with the science of sound, the Groove Tubes team still employs the same testing, grading and matching disciplines that continue to deliver flawless performance every time.
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Brand Groove Tubes