I’m selling my Mesa/Boogie Mark IIB “Super Sixty” 1x12 tube combo in cream, with an Electro-Voice EVM12L Classic speaker and a Rufo transport case.

I purchased this amp in 2020. According to the original seller’s listing, it had been serviced at Mesa/Boogie shortly before that sale, and Mike B. performed the loop modification, sometimes referred to as the “IIB+” mod. The original listing described the modification as revising the gain voicing and effects-loop placement toward the Mark IIC+ sound. This is a modified Mark IIB, rather than a factory Mark IIC+.

The modification also adds a rear-mounted Post-FX Level control, providing another way to manage the overall volume while using the amp’s gain controls.

During my ownership, I installed the Electro-Voice EVM12L Classic speaker, rated at 200 watts and 8 ohms. The amp plays and sounds great.

There is some cosmetic wear on the covering, control panel, and hardware, so please look through the photos. The included Rufo case also shows some exterior wear.

Located in Greenville, SC. Feel free to reach out with questions or requests for additional photos.

Highlights:

• Mesa/Boogie Mark IIB “Super Sixty” 1x12 tube combo
• Handmade in the USA
• Mike B. loop modification, as documented in the original sale listing
• Added rear Post-FX Level control
• Replacement Electro-Voice EVM12L Classic speaker
• Cream covering with black grille
• Rufo transport case included