Many folks who buy our tubes know that we use a special process to categorically rate our tubes so that players can select the tubes that best fit their preferred tones and styles. However, we get a lot of questions about our rating system, and what the numbers actually mean.

IMPORTANT BIAS NOTE: If you're replacing a tube with the SAME TYPE of Groove Tube (tube model and rating), you do not have to rebias your amp. In any other case, you should always have a qualified amp tech reset your amp’s bias whenever changing your tube type or rating number.

low

1-3

Early distortion, wide range, softer attack good for Rock and Blues solos.

Medium

4-7

Normal performance, great dynamic range/attack and best all around rating type for all styles of playing

High

8-10

Most dynamic range, most clean power/less break-up for power players, Jazz and bass amps.

A Rocket To The Moon

A Rocket To The Moon is: Nick Santino - Vocals, Guitar Justin Richards - Guitar Eric Halvorsen - Bass Andrew Cook - Drums Looking back now, it's difficult to believe that A Rocket To Moon all started in Nick Santino's bedroom three years ago when he harmlessly posted a few songs on the Internet. However what began as an electro-tinged sonic experiment quickly snowballed into a full-fledged band that's toured with acts like 3OH!3 and Cobra Starship, played festivals like the Vans Warped Tour and Bamboozle and gained fans all over the world. "I never actually intended for A Rocket To The Moon to get this far," Santino admits, adding he couldn't be more thrilled about the current incarnation of the band. "I always wanted to take it to the next level and put a couple of guys in the act instead of having all the focus on me, so after Bamboozle'08 we started performing as a full band and right now the sound is perfect." The current incarnation of A Rocket To The Moon - Santino, guitarist Jus...

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