SOLD - Mesa Boogie Mark III Red Stripe Combo with EQ 1985-87

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Call 530-570-1525 or email to sell your vintage guitar amp, guitar, bass, amplifier, etc - one piece or a collection!  We are always ready to buy instruments, amps and effects from Fender, Gibson, Martin, Epiphone, Rickenbacker, Gretsch, Marshall, Vox and just about anything else related to musical instruments.   You can also click here for more info on selling us vintage instruments, amps, parts, etc.  


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Another Boogie classic that had a big impact on rock guitar, the Mark III.

This amp has been fully serviced and is 100% good to go.  The footswitches are included, but the cables for them are not so you'll need to find some.

This amp will be shipped in two boxes.  One will hold the speaker and the other the amp cabinet and chassis.  The original speaker is heavy and can ruin the baffle if handled poorly during shipping.  Do not order unless you are comfortable with reassembly on arrival.  

The Mark III was launched by Mesa/Boogie in 1985. It introduced a third channel, a "crunch" rhythm sound right in between the rhythm and lead channels. This amp has a dual footswitch system: one footswitch alternates between the current rhythm mode and the lead mode, and the other selects either the clean rhythm mode or the crunch rhythm mode. The two rhythm modes share all of their controls, while the lead mode only shares the rhythm modes' tone stack, featuring independent gain and master volume controls. The physical switch for the crunch rhythm mode was implemented as a push/pull switch above the Middle frequency control. Most Mark IIIs have presence and reverb on the back (except for long chassis') unless not desired by the buyer; Graphic EQ was also optional all in either head or combo format.

The Mark III went through multiple revisions, similar to the Mark II. Each revision had a slightly different voicing, but identical functionality. Non-Simulclass versions of the Mark III came in either 60w RMS with two 6L6s or 60w/100w with four 6L6s in the power section. Mark IIIs contain either four or five 12AX7 tubes in the pre-amp section, depending on if they have the reverb option. Simul-class Mark IIIs usually contain two 6L6s in the inner sockets and two EL34s in the outer sockets for 15w/75w use.

The third revision was the "Red Stripe" Mark III which featured a red marker stripe above the power cord. The amplifier had lead mode circuitry almost identical to the IIC+ and some minor changes in the preamp to make it similar in circuitry to a IIC+. A further PCB board revision with revised R2 channel was introduced which forces Treble Shift on when in R2 mode. The power circuitry and presence cap remained identical to the previous stripes however.

Shipping policy:

Shipments will require signature on delivery, no exceptions.  If there is damage, the buyer must retain all packing materials intact and picture them immediately and send them to  Less than 1% of our shipments are damaged in transit, and we are committed to making sure your item arrives safely, but we are taking these additional measures to make sure you are happy with your purchase. 

  • Case/Cover?: No
  • Color: Black
  • Dimensions: 18" x 18.5" x 10.75"
  • Weight: 68lbs
  • Watts: 100/60 Watts
  • Date: 1987
  • Speaker 1 Brand/Model: EV, Electrovoice
  • Speaker 1 Size: 15"
  • Speaker 1 Code: 642
  • Speaker 1 Cone: Original
  • Power Transformer brand and/or codes: Mesa 56110 EIA606 -633
  • Output Transformer brand and/or codes: Mesa 550381 EIA606 --647
  • Choke Transformer brand and/or codes: Mesa 562 EIA 606 -703
  • Reverb Transformer brand and/or codes: 550185 EIA606 --608
  • Extension Speaker Out? Yes
  • FX Loop?: Yes
  • Reverb or other effects?: EQ and Reverb
  • Power tubes: 4 x 6L6
  • Power Tube Brand: GT
  • Preamp Tubes: 5 x 12AX7
  • Preamp Tube Brand: RCA and GT
  • Filter Caps: Replaced, originals included
  • Pedal?: 2 Pedals included
  • Pots, codes: Original
  • Tolex:  Original
  • Grille: Original
  • Knobs: Original
  • Handle: Original
  • Power cord: Original
  • Notes: 

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