Groove Tubes GT-6V6-S Med Duet

Product information "Groove Tubes GT-6V6-S Med Duet"

Class-leading dynamics and a cool, expressive sound with improved rated and overall performance. More brilliance in the upper spectrum and a very full, pronounced and rounded output of the lower frequencies. This tube is the optimal replacement model for amps that should sound as rich as they did when new. The delivery includes a matched pair of 6L6 tubes with medium rated power of 20 to 25 watts.

  • Duet 6L6-S tubes, scaled from 1 to 10
  • Each set is matched and designed for a specific output power level (R2, R7 etc.)
  • R1-R3 = Low; early breakup, wide range, smooth attack, good for rock and blues solos
  • R4-R7 = Medium; normal power, wide dynamic range, ideal level for almost all styles and techniques
  • R8-R10 = High; largest dynamic range, highest power for clean tones, late break-up, ideal for loud playing, also jazz and bass amps
  • made in Slovakia
  1. Batch: Duet
  2. Position: Amp
  3. Type: 6V6S
About Groove Tubes

Richard Aspen Pittman is known to most guitarists as a tireless inventor, thinker and creative mind. Already at the age of 11 he played in local bands. At 18 he took a job at the newly opened Guitar Center in Hollywood. Through that job he made contacts with the top musicians of the time and was able to help during recording sessions and on tours to find the ultimate sound.
In 1979 he finally set himself up as an independent consultant with his own company, advising many musical-instrument manufacturers and numerous bands. In the same year he tried to optimise the way tube amps worked. He invented a special testing system for tubes and then sorted the selected tubes into different classes: tube matching was invented.

He then founded the company Groove Tubes. To this day there is still the misconception that Groove Tubes manufactured the tubes themselves. This is not the case: Aspen bought tubes from around the world, inspected and measured them, and then sold them in matched sets, resulting in a perfectly matched pair or quartet. Furthermore, by dividing them into different classes, the amplifier's sound could be influenced to suit personal preferences.

We at session always have a selection of the most important preamp and power tubes from Groove Tubes in our range for you. If you don't know exactly which tube you need, we're happy to advise and help you.

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Klingen gut
18 September 2025 06:23

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