Groove Tubes GT-6L6-S Medium Quartet (Quad) Tubes three chrome latches Crafted using Yamaha’s exclusive Acoustic

Crafted using Yamaha’s exclusive Acoustic Design process

while the NY Steel core wire makes them up to 40-percent stronger bent two whole steps higher

Focus mode allows users to ‘hone in’ on problem frequencies or specific frequencies they want to accentuate or attenuate

Whether you're performing for a recording that demands perfect tuning at all times

Groove Tubes GT-6L6-S Medium Quartet (Quad) Tubes three chrome latches Crafted using Yamaha’s exclusive AcousticThe Groove Tubes GT 6L6 S Medium Output Quartet Power Tubes with generally 20 25 watts outputs often used in Groove Tubes professional amplifiers including the Bassman, Bandmaster, Concert, Dual Showman, Hot Rod Series, Pro Series, Super Reverb, Tremolux, Twin, Vibrolux, Super Sonic, Blues Deluxe, Blues Deville, and others. Available in many variations, its response is smooth, with a pronounced midrange character; strident and chesty with a super