Marshall Major

It was introduced in 1967 as the "Marshall 200" (in reference to the power of the amplifier).

It had a plexi panel and two inputs in one channel, but in contrast with the 100 watt heads made by Marshall, the first series had split tone controls similar to the Sound City amps.

[1] Approximately 1,200 of these amps were produced from 1967 to 1974;[citation needed] Marshall ceased production when the supply of KT88s ran out.

[2] The amplifier was used by rock musicians who needed very high volume.

A notable user is Ritchie Blackmore; his Major had the two input channels cascaded into one, essentially creating the first Marshall with a master volume.