The Fender Bassbreaker 45 Guitar Valve Amplifier Combo featuring classic Fender ’59 Bassman amplifier circuitry for complete articulation and dynamic response, driven by dual EL34 output valves for solid vintage tube tone. The late-’50s tweed-covered Fender Bassman is often called “the grandfather of all amps.” It is beloved by guitarists worldwide for its simplicity, versatility, dynamic range, warm tube overdrive, stage-filling power and rugged roadworthiness.