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Groove TubeBuy Groove Tube musical instruments and sound equipment online at lowest price. Groove Tube VIPRE Mic Preamp and other Groove Tube products for sale.  Groove Tube Live Sound > Signal Processors > Mic Pre-Amps > Groove Tube VIPRE Mic Preamp. The only preamp designed to enhance the characteristics of virtually any mic from the latest tube model to a classic ribbon mic. It adds breathtaking warmth and color, even to FETs. It significantly increases dynamic range and signal-to-noise ratio, dramatically decreases distortion and reveals exceptional detail. Features switch-selectable, fully floating differential input and output, switch-selectable variable impedance (300, 600, 1200, and 2400 ohms), switch-selectable rise times, precise and repeatable gain settings, audio metering with expanded and peak views, robust 1W output capability, and an all-tube audio path.. ...details  Groove Tube Live Sound > Signal Processors > Compressors / Limiters > Groove Tube Glory Comp All Tube Compressor. With the Glory Comp, Groove Tubes spared no expense in creating what they call "the very best tube compressor ever made." In addition to its incredible sonic character, Glory Comp offers features that have never been found on compression devices at any price.The Groove Tubes Glory Comp is a true all-tube compressor, employing 7 high-quality, hand-selected vacuum tubes to accomplish its dynamics processing. Its output tubes a pair of 6005s offer tremendous output power driving a custom wound and robust output transformer (the Glory Comp can actually drive a speaker all on its own!). Fully differential and floating design includes dual isolated output taps on its proprietary output transformer so it can interface with both -10dBV and +4dBu signal levels without sacrificing signal quality or degrading noise specs.Compression ratios from 1:1 to 10:1 are available, as are standard attack, release, and compression threshold controls. In addition to release times from 10ms to 2 seconds, users can choose between logarithmic and linear release modes. Several high-quality ceramic multi-decked switches (instead of less expensive potentiometers) allow for easily repeatable settings. The custom-built, backlit VU meter has 7 different display modes.Built-in sidechain EQ with adjustable low and high frequency filters, using an internal or external side-chaining source selector. Unique Glory knob affects 2nd-order.... ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Tube Bias Tool. An inline socket adapter tool that is placed between the output socket and the output tube to allow the setting and measurement of bias using the current draw method. The tool allows bias checking, setting, and adjustment to be done in the field or anywhere with a minimum of tools. All that is needed is a simple meter (sold separately) and a screwdriver. The settings are able to be duplicated at a later date, such as when changing tubes. This is not possible with the scope and signal generator method. This is the perfect tool for the band on the go as it fits in any toolbox. The average cost for a bias adjustment can be $50, so the Tube Bias Tool can pay for itself very rapidly.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-12AU7 Preamp Tube. This design is from the Ei factory located in the former Yugoslavia. It's an excellent quality large-plate European-made driver tube, styled after the famous Telefunkin line of dual triodes. The usual application for a 12AU7 is as the phase inverter that drives the power tubes. These are very well matched, and so are highly recommended for Ampeg SVT's and other amps using this tube as a phase inverter. These are commonly used as phase inverters in McIntosh Hi-Fi amps, some Ampeg amps, and will yield the most clean headroom in many amps. In the latest Fender Pro Series amps such as the Pro Reverb, Concert, and Twin, this tube in V2 (or a 12AY7), will drop the gain of the gain channel where some feel the tone is of a less intense or "buzzy character. This will then allow a much wider range in the sweep of the volume and gain controls of this channel.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-12AT7 Preamp Tube. Highest quality JAN spec. military tube. NOS, made in USA with extremely long life. Used widely in most U.S.-made amps and, in particular, Fender amps. Fender amps with reverb use 2 - 12AT7s one for the reverb drive stage, and one as a phase inverter to drive the push/pull output stage. The makeup of the 12AT7 is very similar to the 12AX7 and it can be substituted for a 12AX7 in a pinch. Some players prefer the 12AT7 in the driver stage of a Marshall for a cleaner, brighter tone. (The driver or phase inverter is the 12AX7 located nearest the power tubes.) The 12AT7 is rarely used in a tone-generating stage, but rather in function stages, so the Groove Tubes GT-12AT7 is selected for durability.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube GT6L6S Tube Hardness 9 Quartet. Slovakian-made with high power and very aggressive dynamic tone with more highs and lows...punchier sounding but still a sweet tone. New GT design with heavy-duty components.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube KT66-HP Tubes Hardness 1 Quartet. An exact copy of the UK tube that was used in Groove Tubes' Bluesbreaker amps. Huge tone, very warm and round, plus a big bass.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-12AX7-C Preamp Tube. The ever-popular and sorely missed Chinese 12AX7 is finally back! This tube has a warm, fat, old-style tone favored by blues players and the classic rock crowd.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-ECC83-S Preamp Tube. Classic Euro type with medium to high gain and a linear frequency response. Very clear, even tone with good bass character.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube GT-6550R Tubes Hardness 7 Quartet. Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a few other higher powered amps. Also popular for HiFi amps. Newest entry, power and quality should mean long life. Excellent response, yet it's easier to push into distortion than "A" version, a little harder sounding than "C". ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube GT-6550R Tubes Hardness 2 Quartet. Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a few other higher powered amps. Also popular for HiFi amps. Newest entry, power and quality should mean long life. Excellent response, yet it's easier to push into distortion than "A" version, a little harder sounding than "C". ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-5Y3/GZ30 Rectifier Tube. Common to lower powered Fender amps such as the Champ, Princeton and Deluxe amps. May be used in many 5AR4 and 5U4 amps for lower levels. This rectifier may be used in amps such as the Matchless DC-30 series and similar amps when you want more compression, less attack, and to lower the voltages in these amps. This rectifier gives a nice feel to these amps with a much slower rise time than the 5AR4 or the 5U4, with a great feel. This rectifier will also let amps such as the Matchless distort at a lower volume to be used in smaller venues and record sweetly at lower settings.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-5U4/GZ32 Rectifier Tube. Common to many medium powered amps such as the Fender Blackface amps. This is the factory selected rectifier for the Mesa Dual and Triple rectifier series. Common to medium powered amps like the earlier Fender Super Reverbs and Bandmasters. May be used replaced a 5Y3 for improved dynamics and power. Also some players have replaced their 5AR4 (GZ34) with the 5U4 in their Vox AC30 amps to reduce heat and extend the life of the power tubes, we recommended this as a "stability enhancer", if you can live with the slightly lower power.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Substi-Tube 1 6SJ7 to 12AX7 Octal to 9-Pin Adaptor. Groove Tubes Substi-Tubes allow the replacement of octal-type preamp tubes with the more common and higher quality 9-pin miniatures by properly mating a female 9-pin socket to an 8-pin plug. Includes GT-12AX7 tube.. ...details  Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-5AR4/GZ34 Rectifier Tube. The most common rectifier used in higher powered amps which use a rectifier such as Fender 40 watt amps and Vox AC-30 amps. Common to higher powered tube amps, like the later Fender Super Reverb amps and the Vox AC30 (or Matchless copies). It is the higher powered tube type rectifier in our marketplace. May be used to replace a 5U4 or 5Y3 and will give a faster more dynamic tonal result. This rectifier has a rise time from 300-400 volts that is about 1/2 that of a 5U4 so they are very nice in amps such as the Mesa Rectifier series which use the 5U4 if you want a feel and response that is tighter than the stock rectifiers yet retain the feel and compression character of a vacuum rectifier over the solid state setting.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-C Matched Power Tube Low (1-3 GT Rating) Duet. GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of the old USA 6V6 used in old Deluxe Reverbs. Round, warm, fat tone with lower power but great for a soft blues tone or great fat classic rock sound too.These tubes perform very well in the Fender Deluxe Reverb Reissue.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-C Matched Power Tube Low (1-3 GT Rating) Quartet. GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of the old USA 6V6 used in old Deluxe Reverbs. Round, warm, fat tone with lower power but great for a soft blues tone or great fat classic rock sound too.These tubes perform very well in the Fender Deluxe Reverb Reissue.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-C Matched Power Tube High (8-10 GT Rating) Duet. GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of the old USA 6V6 used in old Deluxe Reverbs. Round, warm, fat tone with lower power but great for a soft blues tone or great fat classic rock sound too.These tubes perform very well in the Fender Deluxe Reverb Reissue.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-C Matched Power Tube Medium (4-7 GT Rating Duet. GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of the old USA 6V6 used in old Deluxe Reverbs. Round, warm, fat tone with lower power but great for a soft blues tone or great fat classic rock sound too.These tubes perform very well in the Fender Deluxe Reverb Reissue.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-R Marched Power Tubes Low (1-3 GT Rating) Duet. GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of the old USA 6V6 we loved in our old Deluxe Reverbs. Round, warm, fat tone with lower power put great for a soft blues tone or great fat classic rock sound too. Classically designed with warm overdrive and soft distortion character.The newest version tooling of these 6V6 tubes are making them a favorite in many 6V6 amps. These tubes perform very well in the Fender Deluxe Reverb Reissue.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-R Marched Power Tubes Medium (4-7 GT Rating) Duet. GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of the old USA 6V6 we loved in our old Deluxe Reverbs. Round, warm, fat tone with lower power put great for a soft blues tone or great fat classic rock sound too. Classically designed with warm overdrive and soft distortion character.The newest version tooling of these 6V6 tubes are making them a favorite in many 6V6 amps. These tubes perform very well in the Fender Deluxe Reverb Reissue.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-R Marched Power Tubes Medium (4-7 GT Rating) Quartet. GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of the old USA 6V6 we loved in our old Deluxe Reverbs. Round, warm, fat tone with lower power put great for a soft blues tone or great fat classic rock sound too. Classically designed with warm overdrive and soft distortion character.The newest version tooling of these 6V6 tubes are making them a favorite in many 6V6 amps. These tubes perform very well in the Fender Deluxe Reverb Reissue.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-S Matched Power Tubes Low (1-3 GT Rating) Duet. GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6 than 6V6 in many amps. These handle plate voltages in excess of 475 plate volts and have a very agressive tone and long life.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-S Matched Power Tubes Low (1-3 GT Rating) Quartet. GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6 than 6V6 in many amps. These handle plate voltages in excess of 475 plate volts and have a very agressive tone and long life.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-S Matched Power Tubes High (8-10 GT Rating) Duet. GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6 than 6V6 in many amps. These handle plate voltages in excess of 475 plate volts and have a very agressive tone and long life.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-S Matched Power Tubes Quartet. GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6 than 6V6 in many amps. These handle plate voltages in excess of 475 plate volts and have a very agressive tone and long life.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-S Matched Power Tubes Medium (4-7 GT Rating) Duet. GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6 than 6V6 in many amps. These handle plate voltages in excess of 475 plate volts and have a very agressive tone and long life.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6V6-S Matched Power Tubes Quartet. GT-6V6-S Duet Highest output 6V6. This tube has more of the character of a 6L6 than 6V6 in many amps. These handle plate voltages in excess of 475 plate volts and have a very agressive tone and long life.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-R Matched Power Tubes Low (1-3 GT Rating) Duet. GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system. These are a very sturdy and reliable tube, with slightly less power and a more aggressive edge when pushed into distortion.These are the tubes that are used by Fender in amps that use 6L6 tubes and are amps that DO NOT come from their custom shop. These are used in the Hot Rod series, Blues DeVille series, Pro Tube series, BF reissue series.The GT 6L6GE is used in the 57 Tweed, Vibroverb and Vibro King amps.If you are trying to match your stock tube rating with the GT rating:On Fender amps, output tubes in newer amps are color coded. The scale is:Blue = GT 1-3 rating White = GT 4-7 rating Red = GT 8-10 rating. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-R Matched Power Tubes Low (1-3 GT Rating) Quartet. GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system. These are a very sturdy and reliable tube, with slightly less power and a more aggressive edge when pushed into distortion.These are the tubes that are used by Fender in amps that use 6L6 tubes and are amps that DO NOT come from their custom shop. These are used in the Hot Rod series, Blues DeVille series, Pro Tube series, BF reissue series.The GT 6L6GE is used in the 57 Tweed, Vibroverb and Vibro King amps.If you are trying to match your stock tube rating with the GT rating:On Fender amps, output tubes in newer amps are color coded. The scale is:Blue = GT 1-3 rating White = GT 4-7 rating Red = GT 8-10 rating. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-R Matched Power Tubes High (8-10 GT Rating) Duet. GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system. These are a very sturdy and reliable tube, with slightly less power and a more aggressive edge when pushed into distortion.These are the tubes that are used by Fender in amps that use 6L6 tubes and are amps that DO NOT come from their custom shop. These are used in the Hot Rod series, Blues DeVille series, Pro Tube series, BF reissue series.The GT 6L6GE is used in the 57 Tweed, Vibroverb and Vibro King amps.If you are trying to match your stock tube rating with the GT rating:On Fender amps, output tubes in newer amps are color coded. The scale is:Blue = GT 1-3 rating White = GT 4-7 rating Red = GT 8-10 rating. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-R Matched Power Tubes High (8-10 GT Rating) Quartet. GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system. These are a very sturdy and reliable tube, with slightly less power and a more aggressive edge when pushed into distortion.These are the tubes that are used by Fender in amps that use 6L6 tubes and are amps that DO NOT come from their custom shop. These are used in the Hot Rod series, Blues DeVille series, Pro Tube series, BF reissue series.The GT 6L6GE is used in the 57 Tweed, Vibroverb and Vibro King amps.If you are trying to match your stock tube rating with the GT rating:On Fender amps, output tubes in newer amps are color coded. The scale is:Blue = GT 1-3 rating White = GT 4-7 rating Red = GT 8-10 rating. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-R Matched Power Tubes Medium (4-7 GT Rating) Duet. GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system. These are a very sturdy and reliable tube, with slightly less power and a more aggressive edge when pushed into distortion.These are the tubes that are used by Fender in amps that use 6L6 tubes and are amps that DO NOT come from their custom shop. These are used in the Hot Rod series, Blues DeVille series, Pro Tube series, BF reissue series.The GT 6L6GE is used in the 57 Tweed, Vibroverb and Vibro King amps.If you are trying to match your stock tube rating with the GT rating:On Fender amps, output tubes in newer amps are color coded. The scale is:Blue = GT 1-3 rating White = GT 4-7 rating Red = GT 8-10 rating. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-R Matched Power Tubes Medium (4-7 GT Rating) Quartet. GT-6L6-R (B) Duet Russian made, same as the 5881, but matched in the GT system. These are a very sturdy and reliable tube, with slightly less power and a more aggressive edge when pushed into distortion.These are the tubes that are used by Fender in amps that use 6L6 tubes and are amps that DO NOT come from their custom shop. These are used in the Hot Rod series, Blues DeVille series, Pro Tube series, BF reissue series.The GT 6L6GE is used in the 57 Tweed, Vibroverb and Vibro King amps.If you are trying to match your stock tube rating with the GT rating:On Fender amps, output tubes in newer amps are color coded. The scale is:Blue = GT 1-3 rating White = GT 4-7 rating Red = GT 8-10 rating. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-CHP Matched Power Tubes Low (1-3 GT Rating) Duet. GT exclusive design high performance 6L6 Black Plate with heat sink wings like the GT E34LS and KT88SV. Very strong, smooth, and linear. Fantastic in Fender Hot Rod Deluxe, Deville, etc.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-CHP Matched Power Tubes Low (1-3 GT Rating) Quartet. GT exclusive design high performance 6L6 Black Plate with heat sink wings like the GT E34LS and KT88SV. Very strong, smooth, and linear. Fantastic in Fender Hot Rod Deluxe, Deville, etc.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-CHP Matched Power Tubes High (8-10 GT Rating) Duet. GT exclusive design high performance 6L6 Black Plate with heat sink wings like the GT E34LS and KT88SV. Very strong, smooth, and linear. Fantastic in Fender Hot Rod Deluxe, Deville, etc.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-CHP Matched Power Tubes High (8-10 GT Rating) Quartet. GT exclusive design high performance 6L6 Black Plate with heat sink wings like the GT E34LS and KT88SV. Very strong, smooth, and linear. Fantastic in Fender Hot Rod Deluxe, Deville, etc.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-CHP Matched Power Tubes Medium (4-7 GT Rating) Duet. GT exclusive design high performance 6L6 Black Plate with heat sink wings like the GT E34LS and KT88SV. Very strong, smooth, and linear. Fantastic in Fender Hot Rod Deluxe, Deville, etc.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-CHP Matched Power Tubes Medium (4-7 GT Rating) Quartet. GT exclusive design high performance 6L6 Black Plate with heat sink wings like the GT E34LS and KT88SV. Very strong, smooth, and linear. Fantastic in Fender Hot Rod Deluxe, Deville, etc.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-S Matched Power Tubes Low (1-3 GT Rating) Duet. GT-6L6-S Duet These guitar amp tubes are Slovakian made with high power and very aggressive dynamic tone...punchy, but still sweet. New GT design with more power and heavy duty components. High power type with more highs and lows than other 6L6 types.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-S Matched Power Tubes Hardness 1 Quartet. GT-6L6-S Duet These guitar amp tubes are Slovakian made with high power and very aggressive dynamic tone...punchy, but still sweet. New GT design with more power and heavy duty components. High power type with more highs and lows than other 6L6 types.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-S Matched Power Tubes High (8-10 GT Rating) Duet. GT-6L6-S Duet These guitar amp tubes are Slovakian made with high power and very aggressive dynamic tone...punchy, but still sweet. New GT design with more power and heavy duty components. High power type with more highs and lows than other 6L6 types.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-S Matched Power Tubes High (8-10 GT Rating) Quartet. GT-6L6-S Duet These guitar amp tubes are Slovakian made with high power and very aggressive dynamic tone...punchy, but still sweet. New GT design with more power and heavy duty components. High power type with more highs and lows than other 6L6 types.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-S Matched Power Tubes Medium (4-7 GT Rating) Duet. GT-6L6-S Duet These guitar amp tubes are Slovakian made with high power and very aggressive dynamic tone...punchy, but still sweet. New GT design with more power and heavy duty components. High power type with more highs and lows than other 6L6 types.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT66-C Matched Power Tubes Low (1-3 GT Rating) Duet. GT-KT66-C Duet Chinese made copy of the classic KT66. Great sounding - one step down from the KT66HP, but less money too. New and exclusive GT design. An exact copy of legendary Gold Lion "valve" from the Eric Clapton "Blues Breaker" Marshall combo. Big fat bottom, crisp highs, very warm and a springboard response that make playing fun again! Highly recommended for Fender type amps.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT66-C Matched Power Tubes Low (1-3 GT Rating) Quartet. GT-KT66-C Duet Chinese made copy of the classic KT66. Great sounding - one step down from the KT66HP, but less money too. New and exclusive GT design. An exact copy of legendary Gold Lion "valve" from the Eric Clapton "Blues Breaker" Marshall combo. Big fat bottom, crisp highs, very warm and a springboard response that make playing fun again! Highly recommended for Fender type amps.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT66-C Matched Power Tubes Medium (4-7 GT Rating) Duet. GT-KT66-C Duet Chinese made copy of the classic KT66. Great sounding - one step down from the KT66HP, but less money too. New and exclusive GT design. An exact copy of legendary Gold Lion "valve" from the Eric Clapton "Blues Breaker" Marshall combo. Big fat bottom, crisp highs, very warm and a springboard response that make playing fun again! Highly recommended for Fender type amps.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT66-C Matched Power Tubes Medium (4-7 GT Rating) Quartet. GT-KT66-C Duet Chinese made copy of the classic KT66. Great sounding - one step down from the KT66HP, but less money too. New and exclusive GT design. An exact copy of legendary Gold Lion "valve" from the Eric Clapton "Blues Breaker" Marshall combo. Big fat bottom, crisp highs, very warm and a springboard response that make playing fun again! Highly recommended for Fender type amps.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT66-HP Matched Power Tubes Low (1-3 GT Rating) Duet. GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve" from the Eric Clapton "Blues Breaker" Marshall combo. Big fat bottom, crisp highs, very warm and a springboard response that make playing fun again! Highly recommended for Fender type amps.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT66-HP Matched Power Tubes High (8-10 GT Rating) Duet. GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve" from the Eric Clapton "Blues Breaker" Marshall combo. Big fat bottom, crisp highs, very warm and a springboard response that make playing fun again! Highly recommended for Fender type amps.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT66-HP Matched Power Tubes High (8-10 GT Rating) Quartet. GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve" from the Eric Clapton "Blues Breaker" Marshall combo. Big fat bottom, crisp highs, very warm and a springboard response that make playing fun again! Highly recommended for Fender type amps.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT66-HP Matched Power Tubes Medium (4-7 GT Rating) Quartet. GT-KT66-HP Duet New and exclusive GT design. An exact copy of legendary Gold Lion "valve" from the Eric Clapton "Blues Breaker" Marshall combo. Big fat bottom, crisp highs, very warm and a springboard response that make playing fun again! Highly recommended for Fender type amps.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-GE Matched Power Tubes Low ( 1-3 GT Rating) Duet. GT-6CA7GE Duet These replacement tubes are the reissue of the famed GE 6CA7. Active beam forming element, high vacuum. Output a bit higher than current EL-34 tubes. The GT6CA7GE is the classic American-style EL34 tube made in the exact likeness of the famed General Electric 6CA7 tube of the 60's. This was the tube sold to Eddie Van Halen for his Marshalls used on the first two Van Halen albums. The Groove Tubes 6CA7GE is a USA-style power pentode tube with similar specifications to the European style EL34 tube. However, the 6CA7 differs in design from the common EL34 types by the use of an active beam-forming electrode similar to that of the 6L6 and 6550. To simplify the description, the GT6CA7GE is somewhere between a Mullard EL34 and a GE 6L6 more chest' and certainly more power than any EL34 tube. Plus, they are directly interchangeable in all EL34 circuits (with proper rebiasing, as always).. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-GE Matched Power Tubes Low (1-3 GT Rating) Quartet. GT-6CA7GE Duet These replacement tubes are the reissue of the famed GE 6CA7. Active beam forming element, high vacuum. Output a bit higher than current EL-34 tubes. The GT6CA7GE is the classic American-style EL34 tube made in the exact likeness of the famed General Electric 6CA7 tube of the 60's. This was the tube sold to Eddie Van Halen for his Marshalls used on the first two Van Halen albums. The Groove Tubes 6CA7GE is a USA-style power pentode tube with similar specifications to the European style EL34 tube. However, the 6CA7 differs in design from the common EL34 types by the use of an active beam-forming electrode similar to that of the 6L6 and 6550. To simplify the description, the GT6CA7GE is somewhere between a Mullard EL34 and a GE 6L6 more chest' and certainly more power than any EL34 tube. Plus, they are directly interchangeable in all EL34 circuits (with proper rebiasing, as always).. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-GE Matched Power Tubes High (8-10 GT Rating) Duet. GT-6CA7GE Duet These replacement tubes are the reissue of the famed GE 6CA7. Active beam forming element, high vacuum. Output a bit higher than current EL-34 tubes. The GT6CA7GE is the classic American-style EL34 tube made in the exact likeness of the famed General Electric 6CA7 tube of the 60's. This was the tube sold to Eddie Van Halen for his Marshalls used on the first two Van Halen albums. The Groove Tubes 6CA7GE is a USA-style power pentode tube with similar specifications to the European style EL34 tube. However, the 6CA7 differs in design from the common EL34 types by the use of an active beam-forming electrode similar to that of the 6L6 and 6550. To simplify the description, the GT6CA7GE is somewhere between a Mullard EL34 and a GE 6L6 more chest' and certainly more power than any EL34 tube. Plus, they are directly interchangeable in all EL34 circuits (with proper rebiasing, as always).. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-GE Matched Power Tubes High (8-10 GT Rating) Quartet. GT-6CA7GE Duet These replacement tubes are the reissue of the famed GE 6CA7. Active beam forming element, high vacuum. Output a bit higher than current EL-34 tubes. The GT6CA7GE is the classic American-style EL34 tube made in the exact likeness of the famed General Electric 6CA7 tube of the 60's. This was the tube sold to Eddie Van Halen for his Marshalls used on the first two Van Halen albums. The Groove Tubes 6CA7GE is a USA-style power pentode tube with similar specifications to the European style EL34 tube. However, the 6CA7 differs in design from the common EL34 types by the use of an active beam-forming electrode similar to that of the 6L6 and 6550. To simplify the description, the GT6CA7GE is somewhere between a Mullard EL34 and a GE 6L6 more chest' and certainly more power than any EL34 tube. Plus, they are directly interchangeable in all EL34 circuits (with proper rebiasing, as always).. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-GE Matched Power Tubes Medium (4-7Rating) Duet. GT-6CA7GE Duet These replacement tubes are the reissue of the famed GE 6CA7. Active beam forming element, high vacuum. Output a bit higher than current EL-34 tubes. The GT6CA7GE is the classic American-style EL34 tube made in the exact likeness of the famed General Electric 6CA7 tube of the 60's. This was the tube sold to Eddie Van Halen for his Marshalls used on the first two Van Halen albums. The Groove Tubes 6CA7GE is a USA-style power pentode tube with similar specifications to the European style EL34 tube. However, the 6CA7 differs in design from the common EL34 types by the use of an active beam-forming electrode similar to that of the 6L6 and 6550. To simplify the description, the GT6CA7GE is somewhere between a Mullard EL34 and a GE 6L6 more chest' and certainly more power than any EL34 tube. Plus, they are directly interchangeable in all EL34 circuits (with proper rebiasing, as always).. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6L6-GE Matched Power Tubes Medium (4-7 Rating) Quartet. GT-6CA7GE Duet These replacement tubes are the reissue of the famed GE 6CA7. Active beam forming element, high vacuum. Output a bit higher than current EL-34 tubes. The GT6CA7GE is the classic American-style EL34 tube made in the exact likeness of the famed General Electric 6CA7 tube of the 60's. This was the tube sold to Eddie Van Halen for his Marshalls used on the first two Van Halen albums. The Groove Tubes 6CA7GE is a USA-style power pentode tube with similar specifications to the European style EL34 tube. However, the 6CA7 differs in design from the common EL34 types by the use of an active beam-forming electrode similar to that of the 6L6 and 6550. To simplify the description, the GT6CA7GE is somewhere between a Mullard EL34 and a GE 6L6 more chest' and certainly more power than any EL34 tube. Plus, they are directly interchangeable in all EL34 circuits (with proper rebiasing, as always).. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-C Matched Power Tubes Low (1-3 GT Rating) Duet. GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character. This tube has a distortion that is between a 6L6GC and a 6550A. In older Marshall's that have 6550's, this tube will give you more compression and distortion at lower levels than the other 6550 offerings. This tube is terrific in Class A amps such as the GT Solo Single when you want to have a lot of output for smaller live venues. Many people prefer these in some Marshall amps where more clean headroom and output is desired.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-C Matched Power Tubes Quartet. GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character. This tube has a distortion that is between a 6L6GC and a 6550A. In older Marshall's that have 6550's, this tube will give you more compression and distortion at lower levels than the other 6550 offerings. This tube is terrific in Class A amps such as the GT Solo Single when you want to have a lot of output for smaller live venues. Many people prefer these in some Marshall amps where more clean headroom and output is desired.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-C Matched Power Tubes High (8-10 GT Rating) Duet. GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character. This tube has a distortion that is between a 6L6GC and a 6550A. In older Marshall's that have 6550's, this tube will give you more compression and distortion at lower levels than the other 6550 offerings. This tube is terrific in Class A amps such as the GT Solo Single when you want to have a lot of output for smaller live venues. Many people prefer these in some Marshall amps where more clean headroom and output is desired.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-C Matched Power Tubes Quartet. GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character. This tube has a distortion that is between a 6L6GC and a 6550A. In older Marshall's that have 6550's, this tube will give you more compression and distortion at lower levels than the other 6550 offerings. This tube is terrific in Class A amps such as the GT Solo Single when you want to have a lot of output for smaller live venues. Many people prefer these in some Marshall amps where more clean headroom and output is desired.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-C Matched Power Tubes Medium (4-7 GT Rating) Duet. GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character. This tube has a distortion that is between a 6L6GC and a 6550A. In older Marshall's that have 6550's, this tube will give you more compression and distortion at lower levels than the other 6550 offerings. This tube is terrific in Class A amps such as the GT Solo Single when you want to have a lot of output for smaller live venues. Many people prefer these in some Marshall amps where more clean headroom and output is desired.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-C Matched Power Tubes Quartet. GT-6550-C Duet A softer version of the older USA 6550A, with a nice distortion character. This tube has a distortion that is between a 6L6GC and a 6550A. In older Marshall's that have 6550's, this tube will give you more compression and distortion at lower levels than the other 6550 offerings. This tube is terrific in Class A amps such as the GT Solo Single when you want to have a lot of output for smaller live venues. Many people prefer these in some Marshall amps where more clean headroom and output is desired.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-R Matched Power Tube Low (1-3 GT Rating) Duet. GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a few other higher powered amps. Also popular for HiFi amps. Newest entry, power and quality should mean long life. Excellent response, yet it's easier to push into distortion than "A" version, a little harder sounding than "C".. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-R Matched Power Tube Quartet. GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a few other higher powered amps. Also popular for HiFi amps. Newest entry, power and quality should mean long life. Excellent response, yet it's easier to push into distortion than "A" version, a little harder sounding than "C".. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-R Matched Power Tube Quartet. GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a few other higher powered amps. Also popular for HiFi amps. Newest entry, power and quality should mean long life. Excellent response, yet it's easier to push into distortion than "A" version, a little harder sounding than "C".. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-R Matched Power Tube Medium (4-7 GT Rating) Duet. GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a few other higher powered amps. Also popular for HiFi amps. Newest entry, power and quality should mean long life. Excellent response, yet it's easier to push into distortion than "A" version, a little harder sounding than "C".. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-6550-R Matched Power Tube Quartet. GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a few other higher powered amps. Also popular for HiFi amps. Newest entry, power and quality should mean long life. Excellent response, yet it's easier to push into distortion than "A" version, a little harder sounding than "C".. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT88-C2 Matched Power Tubes Medium (4-7 GT Rating) Duet. GT-KT88-C2 Duet An exact replica of the famous UK made Genelux KT88, it has huge power (700vdc on the plates, more than 50 watts per tube!) Made by the largest tube factory in China, a welcome option for higher powered amps like VHT and HIWATTS. The newest version of the classic European power Pentode, made in one of our Chinese affiliate factories.Close attention to the details of processing and finding correct original materials have made this tube close to an original GEC KT88If your looking for a "standard", then this is the tube for you.. ...details Groove Tube Guitar > Replacement Parts > Tubes > Groove Tube Gold Series GT-KT88-C2 |