The Marshall 2210 is the company’s split channel version of their classic JCM800 head. This head was made i 1984 and includes its original rolling soft case.
The JCM800 2210 is a 100 watt head that features a normal channel with bass, treble, and volume controls, and a boost channel over a 3-band EQ with an additional gain control. A global section controls presence, reverb, and master volume. The master volume would allow you to control whether you run the head as clean/dirty, or essentially have two cranked Marshalls at varying gain stages.