The '50s Fender Bassman was the pro bassist's answer to amplifying a great new invention: the Fender Precision Bass guitar. This powerful 50-watt rig could easily compete with the common instrumentation of the day: horns, piano, four-piece drum kit with calfskin heads, and maybe even an electric guitar through a nice, new 10-watt amp! By the '60s and '70s, the original all-tube "Tweed" 4x10 Bassman was popular with rock, country and blues guitarists as a reliably great-sounding and easy-to-use guitar amp. Even some emerging British amp designers of the day copied its circuitry for use in their most celebrated designs.