Boss GT-100


The BOSS GT 100 is the flagship multi-effects processor from the BOSS range, which can emulate several amps, cab and effect units using the COSM technology. The intuitive user interface, and software editing capabilities make this unit a really useful tool to make great sounds. You can use it as an audio interface, too!


This unit is a real swiss army knife when it comes to finding the perfect sound for the mix. Just to mention some of the amp models, cab simulations and effect models from the unit:

  • Amp models: 26 different types, such as Vox AC 30, Fender Bassman, Matchless D/C 30, Mesa Dual Rectifier, Soldano SLO100 and many more.

  • Cabinet models: 7 different types, such as: 1×10, 1×12, 2×12, 4×12 and so on. The 2×12 model was my favorite anyways.

  • Stompbox models: there are so many effect models in it, 21 types just for OD/Dist. Just a few to mention: OD/Dist, Wave Synth, Sitar simulator, Octave, Pitch shifting, chorus, flanger, tremolo, slicer, Rotary, Uni-V, Vibrato, Delays, and Reverbs also included of course.

You can save your settings into one of the 50 user banks, which contains 4 presets each.

There are two dedicated footswitches to change banks (up and down), 4 footswitches to recall presets, and other to which are addressable to control almost any function, such as an effect on/off, TAP tempo, looper, and so on. There is an expression pedal board too.

As I mentioned before, making patches is really easy on this unit, you’ve got a knob for almost every function, so you don’t have to mess with complex menus.

Computer editing and patch management make the whole process easier. What is more, you’re able to share your favorite patches with the BOSS community, and also load others settings to your GT100, too.

In my opinion, it’s a really usable unit, but I ran into some (I think un-needed) limitations: e.g. I don’t need Bank Up/Down switches, so I wanted to address other functions to them, but I had to realize, that it’s impossible on this unit. Or if you dedicate one of the control switches to turn on pedal mode, you can’t switch back with the same switch, just with by pressing the two Bank switches together (but I don’t really like pressing switches together) so I didn’t use pedal mode.


I was honestly surprised by the quality of the amp simulations! Not that way, that they sound exactly like the real thing, but it sounded very good in the mix, and neutral for me. Clean models were OK too, but I think these were weaker than the drive ones (as usual about the cheaper amp simulator units). There was a real difference between the cabinet simulations too, 2×12 was my favorite. I have never been a BOSS guy, but I liked the delays, choruses, reverbs, tremolo in this unit, as well as the overdrive models! I found them very usable, and easy to use. I’d like to highlight the wah, it sounded absolutely well for me!



  • well built looks very durable
  • really user-friendly editing
  • sounding great, sits well in the mix
  • it’s still easy to carry around


  • more customisation options needed, e.g. about the footswitch allocation
  • effect blocks can be confusing at first
  • there is no global tempo, it was really annoying

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