Details: This poster shows several Marshall amps in the background. The test reads: Marshall Amplification.
Marshall Amplification is a British company, founded by drummer Jim Marshall, that designs and manufactures music amplifiers and brands personal headphones/earphones (made by Zound Industries) and after acquiring Natal Drums, drums/bongos. Marshall amplifiers, and specifically their guitar amplifiers, are among the most recognized brands in popular music. Marshall is based in Bletchley, Milton Keynes. Marshall amps were originally based on Fender amplifiers, but had their own sound, and were soon sought out by guitarists seeking that sound and more volume. Like many high-end guitar amplifiers, many of the current (and reissue) models continue to use vacuum tubes as amplification components. Marshall also manufactures less expensive solid-state and hybrid devices.