GearNuts Essentials Make Your Axe Rock!

Just so you know: the Groove Tubes tubes and sets we sell are all "Mediums." That's in the 4 to 7 range on Groove Tubes' scale. Sorry, we cannot take returns on tubes.

Groove Tubes has been manufacturing, importing, and grading quality power tubes for two decades. No stranger to GearNuts, Groove Tubes founder and energy source Aspen Pittman has paid us numerous informative (and always entertaining) visits through the years. His tireless pursuit of perfect tube tone has resulted in Groove Tubes' reputation for consistency and premium quality. Want proof? Fender tube amps now include Groove Tubes as standard gear, and true tube aficianados worldwide swear by the tubes and pro audio products Groove Tubes makes. For premium tube tone, go with Groove Tubes!

The GT-6L6S Power Tubes Quartet features a new Groove Tubes design with more power and heavy-duty parts. These tubes are a high-power type, with more highs and lows than other 6L6 types. The GT-6L6S Power Tubes Quartet is Slovakian-made with a totally aggressive dynamic tone that's punchy but sweet. Sold in a group of four.