The Mcintosh MC50 mono power amplifier was produced between the years of 1969 to 1975. While this power amp is perfectly suitable for powering small bookshelf speakers or un-powered studio monitors, this particular model is famous for being used by Jerry Garcia for his guitar rig. Used in conjunction with a tube preamplifier and a speaker of your choice, the MC50 will offer wonderful guitar tones for Jerry fans and guitarists alike.