Groove Tubes GT-12AU7 Select

Our lowest-gain preamp tube.

Can sub for a 12AX7 to lower gain and produce a very creamy, warm tone.

Great for harp or blues when softer, more compressed distortion at lower volumes is desired. Very low gain and very mellow output.

Preamp Tubes

These 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. Outstanding and consistent

performance for mixing and matching to get a signature tone from your amp.