One of the most important amps Mesa Boogie's history, the Mark III launched in 1985 and brought a third "crunch" channel the party, offering even more versatility to an already-winning formula of paint-peeling volume and a wider range of tones than any of the mass-produced amps of the time. Slightly revised each year from 1985 - 1989, most of these amps will come with Reverb and Presence controls on the rear panel and, though it was optional, the 5-band graphic equalizer made it onto a majority of Mark IIIs.

The Mark III was delivered in a variety of configurations -- 60- and 100-watt heads and 1x12" combos, as well as with the "Simul-Class" power section from the Mark IIB which runs the outer pair of power tubes (either EL34 or 6L6 as triodes) in Class-A while the inner pair of 6L6s runs Class-AB, making the amp switchable from 75- to -15-watt operation. The "Green Stripe" revision from 1989 and onward was only offered in Simul-Class, and ran the outer pair of power tubes as pentodes rather than triodes to gain an extra 10 watts of power in both modes, making it switchable between 85 and 25 watts.

Mesa Boogie Mark III Versions / Configurations

• Mark III 60-Watt Combo 1985 - 1988
• Mark III 100-Watt Combo 1985 - 1988
• Mark III Simul-Class Combo 1985 - 1988
• Mark III 60-Watt Head 1985 - 1988
• Mark III 100-Watt Head 1985 - 1988
• Mark III Simul-Class Head 1985 - 1988
• Mark III "Green Stripe" Simul-Class Combo 1989 - 1997
• Mark III "Green Stripe" Simul-Class Head 1989 - 1997