I demonstrate a wonderful 1968 Marshall Bluesbreaker Model no. 1961. This is the 4x10 version so it sounds much closer to the 59 Fender Bassman. I'm using a 2010 Gibson Les Paul Custom Black Beauty. The speakers are the original Celestion G10 7442. It's recorded by a Unidyne 548 and SM57 Close mic and a Sennheiser e906 room mic.