Marshall JCM 800 2203 100w Canadian vertical input tube head. 1983, one owner, this amp was previously modified, but has been mostly returned to stock. We have fully serviced it, and it now has four inputs (hi/lo and rhythm/normal) with a master volume control on the rear panel. It has a switchable George Metropoulos FX loop, a quality upgrade whose installation we have checked and verified. Sounds exceptional and very loud.