A medium-output power tube (generally 20-25 watts) often used in Fender® 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 round, with a pronounced mid-range character; strident and chesty with a super-bright and clean, powerful punch. Perhaps the most recognized signature tone for U.S. guitar music of all styles from the '60s onward.