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T-12AX7-C-GT Item ID: 004445	12AX7 C - Groove Tubes 9 pin miniature preamp tube (Amplification Factor = 100). This is the ubiquitous Chinese 12AX7 with added selection. The gain is high and the American "Groove Tubes" must be filtering out the noisiest ones. Great chiming tone with sweet, warm midrange excellent for Marshall® and Fender® amps. Smooth distortion characteristics and one of the highest-output preamp tubes in the GT 12AX7 line, with very consistent quality Read More...	$19^.95 Qty: *	Click to read more about this product.
T-12AY7-GT Item ID: 004465	12AY7 - Groove Tubes This 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 70s vintage gain levels with its returned wider frequency response. Read More...	$23^.95 Qty: *	Click to read more about this product.
T-12AT7-GT Item ID: 004427	12AT7 - Groove Tubes 9 pin miniature preamp tube (Amplification Factor = 60) Durable phase splitter or driver tube. Excellent in vibrato or reverb circuits where consistent, high output power is desired. Read More...	$19^.95 Qty: *	Click to read more about this product.