In this video we're comparing a 1977 Marshall JMP 2204 to a 1983 Marshall JCM800 2204 (4010, but is the combo version of 2204). I'm playing them through a 1971 Marshall 1960B and through the 4010 cabinet with a 1971 G12H30 55Hz Pulsonic Greenback in it. The guitar is a 2008 Gibson Les Paul R9.