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Groove Tube
The Groove Tubes Silver Series ST-6L6-S Power Tube employs a new design with more power and heavy duty components. Slovakian made, with high power and very aggressive dynamic tone... punchy, but with a sweet tone. High power type with more highs and lows than other 6L6 types.
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Groove Tube
The Groove Tubes Silver Series ST-7591-R Power Tube is a somewhat obscure pentode tube used in some early Gibson amps that had been off the market. Recently, a Russian factory decided to supply it again. Groove Tubes ST-7591-R tubes are made in very low quantities and are a close copy of the original vacuum tube.
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Groove Tube
The Groove Tubes Silver Series ST-E34L-S Power Tube is an exclusive GT design with special "heat wings" attached to plate for 15% more power, longer life, and better tone. Big bottom, very dynamic, most powerful in it's class. The 1st choice of Matchless and many pro players including Billy Gibbons, Joe Perry and Joe Walsh.
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Groove Tube
Groove Tubes Silver Series ST-EL34-C Power Tube offers you good tone for the money, slightly less power, but lacks top end. Lightweight design means it's looser and easily overdriven. A classic reissue of a European pentode popular for its soft break up and warmer tone that is a result of the tube's lighter-weight plate structure.
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Groove Tube
The Silver Series ST-EL84-S Power Tube is Groove Tubes' European version with even more response, higher power and warmer tone. Good quality, long lasting type vacuum tube with a slightly aggressive edge when pushed into overdrive. Most common low power pentode, popularized in early Vox AC30 amps. Quick, soft overdrive distortion, a great power tube for recording.
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Groove Tube
Groove Tubes Substi-Tubes allow the replacement of octal-type preamp tubes with the more common and higher quality 9-pin miniature vacuum tubes by properly mating a female 9-pin socket to an 8-pin plug. Includes GT-12AX7 tube.
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Groove Tube
Groove Tubes Substi-Tube 2 adapter allows the replacement of octal type preamp tubes with the more common and higher-quality 9-pin miniatures. It properly mates a female 9-pin socket to an 8-pin to fit the included GT-12AX7.
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Groove Tube
It converts an 8-pin socket allowing use of EL-84 power tubes. This converts class A/B amplifiers to Class A and reduces power. For a 100W amp, output will be lowered to about 40W. A typical 50W amp will be reduced to about 20-25W. Duet includes 2 adapters and 2 EL84 tubes. These are used in pairs or quads, not individually. These are NOT for use in Class A amplifiers. For Class A amplifiers, use the 928, not the 928-PR.They will reduce the load on your power transformer, and allow your amp to reach distortion with a nice AC-30 or EL-84 sound and feel at lower levels.Dimensions - tube tip to amp chassis requires 4-1/4".
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