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Fender Groove Tubes GT-12AY7 Select Amplifier Tube
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- 9-pin triode design
- Lower gain than 12AX7
- Great for harp and blues guitar
- Thoroughly tested
- Warranty Included
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GT-12AY7 tubes pass every Groove Tubes premium certification for micro phonics, 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. Low-gain tube used in very early Fender amps. Can sub for a 12AX7 to lower gain and produce a slightly warmer tone. Great for harp or blues where softer, more compressed distortion at lower volumes is desired. Medium/soft gain.
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I've also used GT tubes in other all tube amps in the past, and I've never had an issue. They're a good compromise, in my mind, between quality and cost. I never have the budge to buy the super-expensive cork-sniffer tubes, so GTs suit me just fine.
I've had GT12AY7s in the v1 positions of a 5E3 clone (Tweed Deluxe) clone and also a 5F4 (Tweed Super) clone for about two years. It's not dark sounding like a JJ12AX7, and has a better high end. While it does not have the richness of a 1950s RCA tube, it costs a lot less.
Simply put, this tube is excellent, and a great "bang for the buck."
I am using it as a lower gain replacement in a guitar stompbox pedal (Rocktron Silver Dragon). It is probably running as a starved plate circuit. It sounds great, has the appropriate lower 12AY7 gain, and overdrives nicely. The Silver Dragon circuit has a ridiculously aggressive high gain characteristic, and this tube works well with that. Harmonics sound good, and I will be keeping this configuration.
As the old ad used to say "Try it - you'll like it!". I did and I do.