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MESA/BOOGIE
chevron_right ELECTRIC TUBE AMPLIFIERS: MARK (MK) SERIES

ELECTRIC TUBE AMPLIFIERS: MARK (MK) SERIES

The Mark (MK) Series are the first amplifiers produced by MESA. These were made famous by Carlos Santana after Randall Smith altered a Fender Princeton and Santana played it. These amps represent the company's early efforts and because of that, there are several variations of these models. Some amps may have the 5-band EQ, some may not. Some may have reverb, and others may not. Some models may only be 60W. Cabinets were covered in all different types of woods including maple and koa, and other coverings were available as well. Note that just because our description may not list a feature does not mean something is wrong with the nomenclature to the actual amp. The descriptions we list are the most common "standard" models that were produced.
The reverb, presence, and effects loop controls were mounted on the back of the chassis. Since reverb was optional on almost all models, the reverb control could be added with altering the front of the amp. There were speaker cabinets available to match up with the Mark Series. These were available as a 1-12 in. or 4-12 in. configuration.

Models (21)

JP-2C JOHN PETRUCCI HEAD

- 60W/100W, guitar head unit, nine-tube chassis, preamp: 5 X 12AX7, power: 4 X 6L6, three switchable channels, 15 modes, spring reverb, front black control panel, single input, 18 black knobs (each channel: g, MV, p, t, m, b), EQ switch for each channel, dual five-band graphic EQ, standby switch, power switch, rear panel: reverb level knob for each channel, headphone jack, slave jack, four speaker jacks, effects loop, CabClone XLR DI jack, speaker on/off switch, closed back/open back/vintage switch, lift/ground switch, dB switch, footswitch jack, MIDI thru/out jack, MIDI in jack, store switch, 60W/100W switch, available in black covering with a black cloth grille, 9.25 in. tall, 18.75 in. wide, 10.87 in. deep, 40 lbs., mfg. 2016-present.

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JP-2C John Petrucci Rackmount Head

- 60W/100W, guitar head unit, rackmount configuration, nine-tube chassis, preamp: 5 X 12AX7, power: 4 X 6L6, three switchable channels, 15 modes, spring reverb, front black control panel, single input, 18 black knobs (each channel: g, MV, p, t, m, b), EQ switch for each channel, dual five-band graphic EQ, standby switch, power switch, rear panel: reverb level knob for each channel, headphone jack, slave jack, four speaker jacks, effects loop, CabClone XLR DI jack, speaker on/off switch, closed back/open back/vintage switch, lift/ground switch, dB switch, footswitch jack, MIDI thru/out jack, MIDI in jack, store switch, 60W/100W switch, available in black covering with a black cloth grille, 7 in. tall, 19.12 in. wide, 9.5 in. deep, 35 lbs., mfg. 2016-present.

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MK-1

- 60 or 100W, 1-12 in. speaker, guitar combo, eight-tube chassis, preamp: 4 X 12AX7, power: 4 X 6L6GC, two channels, optional reverb, front black control panel, two inputs, six black knobs (v1, v2, MV, t, b, m), optional five-band graphic EQ (later models), standy switch, power switch, rear panel: ground switch, slave out jack with level control, optional presence control, optional reverb control, speaker jacks, available in a wood cabinet with a wicker cane grille or white Tolex with a brown grille, includes serial numbers 1-2999, mfg. 1971-78.

These early Boogies are referred to as "Mark I" but this nomencalture isn't stamped anywhere on the amp and it wasn't called this until the Mark II was introduced in 1978. The Mark I has two channels, but they are not switchable - the cable must be plugged into one or the other inputs. Later models have a push/pull bright switch on the 1st volume knob and a push/pull boost switch on the 2nd volume knob. Reverb was optional and this did not become very common until later on. The five-band graphic EQ was introduced as an option later on as well. The rear control panel is very primitive with Dymo stick labeling the various controls and jacks.

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MK-1 REISSUE

- 100W, 1-12 in. Celestion Custom 90 speaker, guitar combo, nine-tube Class A/B chassis, 4 X 12AX7, 1 X 12AT7, power: 4 X 6L6, two modes, reverb, front black control panel, two inputs, six black knobs (v1, v2, MV, t, b, m), half power switch, effects loop, Imbuya hardwood or cream vinyl coverings wicker cane or brown cloth grille, mfg. 1989-2007.

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MK-1 Reissue Head

- similar to the MK-1 Reissue except in head-unit configuration, mfg. 1989-2007.

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MK-II(A)

- 60 or 100W, 1-12 in. or optional 1-15 in. speaker, guitar combo, eight-tube chassis, preamp: 4 X 12AX7, power: 4 X 6L6GC, two switchable channels, optional reverb, front black control panel, single input, footswitch jack, seven black knobs (volume 1 with a push/pull bright switch, t with a push/pull shift switch, b, m, Master 1 with a push/pull gain boost switch, Lead Drive with a push/pull Lead switch, Lead Master with a push/pull bright switch), optional five-band graphic EQ with EQ in/out switch, standby switch, power switch, rear panel: mains selector, ground switch, slave out jack with level control, preamp out/power amp in jack, presence control, optional reverb control, speaker jacks, 60W/100W power switch, available in standard black Tolex covering with a black grille or custom hardwood cabinet with wicker grille, serial numbers 3000-5574, mfg. 1978-1980.

This amp is often referred to as the MK-IIA although that was never mentioned in Mesa's product information or on the amp itself. The Mark II along with a few late-model Mark I amps featured a silicon component called a Fetron that was used in place of one of the 12AX7 tubes. When a Fetron was installed, the amp also had a switch that allowed the user to configure the amp for use with either a Fetron or a regular tube. The Fetron was not very popular and was discontinued in the early 1980s.

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MK-II(A) Head

- similar to the MK-II(A), except in head-unit configuration, mfg. 1978-1980.

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MK-IIB

- similar to the MK-II(A), except has an effects loop and Mesa/Boogie's patented optional Simul-Class system, serial numbers 5,575-11,000, mfg. 1980-83.

Mesa/Boogie's patetened Simul-Class power tube system utilized two separate sets of power amp tubes instead of running all four the same way. In Simul-Class Two 6L6 tubes operate in Class AB pentode and two other 6L6 or EL34 power tubes operate in Class A triode. Simul-Class was optional on the Mark IIB, and models without it will have the standard 60W/100W power switch.

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MK-IIB Head

- similar to the MK-IIB, except in head-unit configuration, mfg. 1983-1985.

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MK-IIC/MK-IIC+

- similar to the MK-IIA and MK-IIB, except has quieter channel switching and a quieter reverb circuit (MK-IIC) and a more sensitive lead channel and improved effects loop (MK-IIC+), serial numbers 11,001-14,999, mfg. 1983-85.

The Mark IIC+ is widely considered to be Mesa's best sounding Mark amp and is the most collectible. While the MK-IIC and MK-IIC+ look identical on the outside, the difference between the two can be determined by a "+" hand-written in black above the power cord input on the rear panel for the MK-IIC+. Since this is such an easy forgery by someone simply putting this "+" on their MK-IIC themselves, we recommend contacting Mesa/Boogie directly to confirm the exact model of your amp. Mesa built about 1,400 MK-IIC amps before switching to the MK-IIC+, meaning serial numbers over approximately 12,401 are the MK-IIC+ models.

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MK-IIC/MK-IIC+ Head

- similar to the MK-IIC/MK-IIC+, except in head-unit configuration, mfg. 1983-85.

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MK-III HEAD

- 100W (switchable to 60W), guitar head-unit, nine-tube chassis, preamp: 5 X 12AX7, power: 4 X 6L6GC or 2 X 6L6GC and 2 X EL34, three switchable channels (Clean Rhythm, Crunch Rhythm, Lead), reverb, front black control panel, single input, seven black numbered knobs (v with pull bright for Rhythm channels, t with pull gain for Lead channel, b with pull low-end breath in Rhythm channels, m with pull channel switch to Crunch Rhythm channel, MV with pull deep switch, Lead Drive with pull channel switch to Lead channel, Lead Master with pull bright switch in Lead channel), five-band graphic EQ, footswitch jack, EQ auto/EQ in switch, standby switch, power switch, rear panel: ground switch, direct out, effects loop, presence control reverb control, three speaker jacks (two 4 ohm and one 8 ohm), tube switch, black covering, black grille, mfg. 1985-1999.

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MK-III 1-12 Combo

- similar to the MK-III Head, except in combo configuration with 1-12 in. speaker, mfg. 1985-1999.

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MARK IV (MK IV) HEAD

- 85W, guitar head-unit, nin-tube chassis, preamp: 5 X 12AX7, power: 4 X 6L6, solid-state rectifier, Simul-Class power section, three channels (rhythm 1, rhyhtm 2, lead), reverb, front black control panel, single input, eighteen black knobs (Rhythm 1 g with pull bright switch, Rhythm 2 g with pull fat switch, Lead g with pull fat switch, Rhythm 1 t, Lead 2 t, Rhythm 1 and 2 b, Lead b, Rhythm 1 and 2 m, Lead m, Rhythm 2 t, Lead drive with pull bright switch, Rhythm 1 p, Rhythm 1 MV, Rhythm 2 p with push/pull, Rhythm 2 MV, Lead p with push/pull, Lead MV, output level with pull silent recording), five band graphic equalizer, graphic EQ switch, lead voicing switch, power switch, full power/tweed power switch, rear panel: reverb knob, reverb footswitch jack, Satellite send and EQ, effects loop with stereo return, effects loop switch, two auto assign switches, recording out jack with level control, slave out jack with level control, triode/pentode switch, Simul Class/Class A switch, Harmonics/mid-gain switch, three speaker out jacks (two 4 ohm, one 8 ohm), five-way rotary mode select switch, six external switching jacks, black vinyl covering, black grille, slip cover, available in short head width (18.625 in.), medium head width (22.5 in.), or rackmount configuration, mfg. 1990-2008.

The Mark IV is also available in a wood cabinet with a wicker grille. In 1994, this amp was redesigned and labeled the Mark IVB, which is what the version described here is.

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Mark IV 1-12 Combo

- similar to the Mark IV Head, except in combo configuration with 1-12 in. Original EVM 12L speaker, mfg. 1990-2008.

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Mark IV 1-12 Widebody Combo

- similar to the Mark IV Head, except in combo configuration with 1-12 in. Celestion Custom 90 speaker, mfg. 1990-2008.

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MARK V HEAD (40TH ANNIVERSARY)

- 90W (switchable to 45W or 10W), medium width guitar head unit, 12 tube chassis, preamp: 7 X 12AX7, power: 4 X 6L6, switchable 5U4/solid-state rectifier, three channels, three modes, reverb, front black control panel, single input, 23 black knobs, Channel 1 controls: g, MV, p, t, m, b, clean/fat/tweed mode switch, EQ on/footswitch switch, 90/45/10W switch, normal/bright switch, Channel 2 controls: g, MV, p, t, m, b, edge/crunch/Mark 1 mode switch, EQ on/footswitch switch, 90/45/10W switch, normal/bright switch, Channel 3 controls: g, MV, p, t, m, b, MK II C+/MK IV/Extreme mode switch, EQ on/footswitch switch, 90/45/10W switch, normal/bright switch, five-band slider EQ with three preset switches and three preset depth knobs, independent reverb knobs for each channel, tube/solid-state rectifier switches for Channels 1 and 2, pentode/triode rectifier switch for Channel 3, effects loop, eight-button footswitch, black Taurus covering, black grille cloth, 22.875 in. wide, mfg. 2009-present.

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Mark V 1-12 Combo (40th Anniversary)

- similar to the Mark V Head (40th Anniversary), except in combo configuration with 1-12 in. C90 speaker, mfg. 2009-present.

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MARK V 25 HEAD

- 25W (switchable to 10W), small width guitar head unit, eight-tube chassis, preamp: 6 X 12AX7, power: 2 X EL84, two channels, six modes, reverb, front black control panel, single input, 12 black knobs, Channel 1 controls: g, t, m, b, p, MV, clean/fat/crunch mode switch, EQ on/footswitch switch, 25/10W switch, Channel 2 controls: g, t, m, b, p, MV, Mark IIC/Mark IV/XTreme mode switch, EQ on/footswitch switch, 25/10W switch, five-band slider EQ, rear panel: effects loop, headphone jack, independent reverb knobs for each channel, footswitch, black Taurus covering, black grille cloth, 14 inches wide, mfg. 2014-present.

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MARK V 35 HEAD

- 35W (switchable to 25W/10W), guitar head unit, ten-tube chassis, preamp: 6 X 12AX7, power: 4 X EL84, two channels, six modes, reverb, front black control panel, single input, 14 black knobs, Channel 1 controls: g, t, m, b, p, MV, solo, clean/fat/crunch mode switch, EQ on/footswitch switch, 35/25/10W switch, Channel 2 controls: g, t, m, b, p, MV, solo, Mark IIC/Mark IV/XTreme mode switch, EQ on/footswitch switch, 35/25/10W switch, five-band slider EQ, power switch, standby switch, rear panel: footswitch jack, effects loop, headphone jack, independent reverb knobs for each channel, three speaker jacks, DI jack, speaker power switch, closed back/open back/vintage switch, lift/ground switch, footswitch, black Taurus covering, black grille cloth, 9.12 in. tall, 18.87 inches wide, 10.87 in. deep, 27 lbs., mfg. 2015-present.

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