The Marshall 2550 is a 50-watt guitar amplifier head from Marshall’s JCM 25/50 Silver Jubilee series, introduced in 1987 to mark Marshall’s 25th anniversary and Jim Marshall’s 50 years in the music business. The amp is switchable between 50 and 25 watts and uses two EL34 power tubes. Original 1987 Silver Jubilee versions were finished in silver tolex with a silver/chrome control panel, while later 2550 models were also made in black tolex with a gold panel as part of the JCM 25/50 Custom range, often informally called the “black Jubilee.”
