Here at thetubestore.com we sell tubes from the original manufacturer whenever possible.
Groove Tubes is not a tube manufacturer. Neither, for that matter, do Fender (who now own the Groove Tubes name), Ruby Tubes and a host of other companies manufacture tubes. All of these companies simply re-label tubes from the same factories we buy from: the companies who actually build tubes, such as New Sensor (who make Electro- Harmonix, Sovtek, Svetlana, and re-issues of Mullard and Tung-Sol tubes), JJ Electronic, Shuguang, SED and a few other factories.
We believe in providing honest value for your money when purchasing tubes and letting you decide exactly which brand and type you would like to buy. This is the only way you can compare the different sounds of different tubes in your amp by knowing exactly what's in there.
Our Perfect Pair power tubes are matched as closely as anyone in the tube industry and have the most accurate, bias-free operation of any tube numbering system, including Groove Tubes.
We hope you'll agree with us that it's better not to pay extra for "rebranded" tubes and that it also
makes more sense to know exactly what tube you're buying.
If your amp currently has Groove Tubes in it and you have questions about replacing them, or about biasing your amp with non-Groove Tubes, ask us! Some of the common Groove Tubes part numbers are listed below with a cross reference to the original brand and part number to help you figure out what your Groove Tubes are.