Early 70's vintage gain levels with a returned wider frequency response.
The Groove Tubes GT-12AY7 Select Preamp Tube is closest in specification to a 12AX7 and can be exchanged with a slight drop in gain. Most companies changed over to the 12AX7 as it became more common.
This tube can be tried in later Marshall amplifiers in the first gain position, where the owner of these amps would like to drop the background noise and lower the gain level to plexi or early 70's vintage gain levels with its returned wider frequency response.
Country of origin: Russia
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Groove Tubes GT-12AY7 Select Preamp Tube Features:
Groove Tubes GT-12AY7 Select Preamp Tube Specifications:
Groove Tubes GT-12AY7 Select Preamp Tube
90 day warranty on power tubes, includes replacement of whole set if one tube goes bad.
180 day warranty for preamp tubes.
3 year warranty on SubstiTubes and Solid State Rectifier.
Check with M-Audio for warranty on GT microphones.
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