Groove Tubes GT-12AT7 tubes pass every Groove Tubes premium certification for microphonics, hum, physical characteristics and function. Quite simply the best 9-pin triode preamp tubes you can buy - specifically designed and tested for musical instrument amplification and standard equipment on Fender® amps (but able to be used in any amp that uses a 12AT7). Outstanding and consistent performance for mixing and matching to get a signature tone from your amp. Durable design that can be used as a phase splitter or driver tube. Excellent in vibrato or reverb circuits where consistent, high output power is desired. Can sub for a 12AX7 to lower gain and produce a slightly warmer tone.
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