Fender tube amps now come factory equipped with matched Groove tubes. Because they are color...
Fender tube amps now come factory equipped with matched Groove tubes. Because they are color...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
Groove Tubes have improved harmonic balance, longer life, matched gain to frequency response ratios and...
An inline socket adapter tool that is placed between the output socket and the output...
This design is from the Ei factory located in the former Yugoslavia. It's an excellent...
Highest quality JAN spec. military tube. NOS, made in USA with extremely long life. Used...
All Ruby output tubes are labeled on the base with the exact matching measurements for...
All Ruby output tubes are labeled on the base with the exact matching measurements for...
A premium tube that produces more power, more tone, and higher fidelity with an extended...
A premium tube that produces more power, more tone, and higher fidelity with an extended...
Revive your old Deluxe Reverb with this premium tube. All Ruby output tubes are labeled...
Revive your old Deluxe Reverb with this premium tube. All Ruby output tubes are labeled...
Ruby exclusive with large bottle, gold-plated grid, and extra internal anchoring. All Ruby output tubes...
Ruby exclusive with large bottle, gold-plated grid, and extra internal anchoring. All Ruby output tubes...
Hand-picked Tesla with lower gain and a full, robust tone. All Ruby output tubes are...
Allows you to use EL84s in place of 6L6GC, 5881, EL34, and 6V6GT power tubes...
This Russian-made pentode is standard issue on many UK amps and has great durability. As...
Popular for its soft breakup and the warmer tone that results from its lighter-weight plate...
Slovakian-made with high power and very aggressive dynamic tone with more highs and lows...punchier sounding...
The ever-popular and sorely missed Chinese 12AX7 is finally back! This tube has a warm,...
A Russian EL84, this is the most common low-power pentode, popularized in early Vox AC30...
Classic Euro type with medium to high gain and a linear frequency response. Very clear,...
Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a...
Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a...
Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a...
Common to lower powered Fender amps such as the Champ, Princeton and Deluxe amps. May...
Common to many medium powered amps such as the Fender Blackface amps. This is the...
Groove Tubes Substi-Tubes allow the replacement of octal-type preamp tubes with the more common and...
The most common rectifier used in higher powered amps which use a rectifier such as...
Sweet, singing tone for high plate voltage amps. The 6V6EH combines a specially developed cathode...
Sweet, singing tone for high plate voltage amps. The 6V6EH combines a specially developed cathode...
Replaces 6AL5, 6EB5, EAA91, or 5726 types....
GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of...
GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of...
GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of...
GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of...
GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of...
GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of...
GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of...
GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6...
GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6...
GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6...
GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6...
GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6...
GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system....
GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system....
GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system....
GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system....
GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system....
GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system....
GT-6L6-C Duet Chinese made, sweeter tone and nice break up. Latest design handles higher plate...
GT-6L6-C Duet Chinese made, sweeter tone and nice break up. Latest design handles higher plate...
GT-6L6-C Duet Chinese made, sweeter tone and nice break up. Latest design handles higher plate...
GT-6L6-C Duet Chinese made, sweeter tone and nice break up. Latest design handles higher plate...
GT-6L6-C Duet Chinese made, sweeter tone and nice break up. Latest design handles higher plate...
GT-6L6-C Duet Chinese made, sweeter tone and nice break up. Latest design handles higher plate...
GT-6L6-S Duet Slovakian made with high power and very agressive dynamic tone...punchy, but still sweet....
GT-6L6-S Duet Slovakian made with high power and very agressive dynamic tone...punchy, but still sweet....
GT-6L6-S Duet Slovakian made with high power and very agressive dynamic tone...punchy, but still sweet....
GT-6L6-S Duet Slovakian made with high power and very agressive dynamic tone...punchy, but still sweet....
GT-6L6-S Duet Slovakian made with high power and very agressive dynamic tone...punchy, but still sweet....
GT-KT66-C Duet Chinese made copy of the classic KT66. Great sounding - one step down...
GT-KT66-C Duet Chinese made copy of the classic KT66. Great sounding - one step down...
GT-KT66-C Duet Chinese made copy of the classic KT66. Great sounding - one step down...
GT-KT66-C Duet Chinese made copy of the classic KT66. Great sounding - one step down...
GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve"...
GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve"...
GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve"...
GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve"...
GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve"...
GT-6CA7GE Duet The reissue of the famed GE 6CA7. Active beam forming element, high vacuum....
GT-6CA7GE Duet The reissue of the famed GE 6CA7. Active beam forming element, high vacuum....
GT-6CA7GE Duet The reissue of the famed GE 6CA7. Active beam forming element, high vacuum....
GT-6CA7GE Duet The reissue of the famed GE 6CA7. Active beam forming element, high vacuum....
GT-6CA7GE Duet The reissue of the famed GE 6CA7. Active beam forming element, high vacuum....
GT-6CA7GE Duet The reissue of the famed GE 6CA7. Active beam forming element, high vacuum....
GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character....
GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character....
GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character....
GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character....
GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps...
GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps...
GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps...