P.R.O.T.O. FOUR is a free amp sim VST plugin that was inspired by the design and tonal shaping capabilities of Mesa Mark series amplifiers and their sounding overall.
First published in the 1st quarter of 2018 as an experimental amp simulator (MegaFuzzie MKIV) it received a lot of guitarists’ love throughout all this time due to its versatility, practicality, and sounding. Now, this amp sim reincarnates into “P.R.O.T.O. FOUR” with new features, much enhanced and extended tonal shaping capabilities, and of course, better graphics.
The amp sim covers a lot of ’80s and ’90s metal tones and is even able to pull out some great modern tones.
For more details please read the manual. P.R.O.T.O. FOUR is available in 32-bit and 64-bit VST for Windows only.
Supported platforms & download
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