Mesa Boogie Mark Series - Mark IV

Mark IV

The Mark IV was launched by Mesa/Boogie in 1990. It was the state-of-the-art Mesa/Boogie three-channel combo amp, with independent controls for all three channels, except bass and mid, which are the same for both Rhythm 1 (clean) and Rhythm 2 (crunch). There were two versions of this amp. Start of production until about September 1993 Mark IV's are referred to as version A; amplifiers made from late 1993 until the end of production in 2008 are known as version B. Early B's have an attached power cord, like the A version. Some differences: version A has no footswitch for reverb or stereo effects loop, and the lead channel is much like the Mark IIC+'s. Version B has switchable reverb, a single switchable stereo effects loop, and an output to drive another power amp. Its voicings are altered slightly. Both versions are highly regarded; production of the Mark IV ceased in 2008.