Completely amazing Rock and Roll machine 1975 Fender Bassman 100 through a 1971 Marshall 1960B 4x12 cabinet. I'm using an Ironman 2 to knock off 6dB and to match the impedance (4ohm to 16 ohm). I'm playing a 2008 Gibson Les Paul R9 with an SD Alnico II in the bridge. Close mics: SM57 and Unidyne 548, room mic M160. These were built between 1972 and 1977. I didn't expect this great performance out of this model.