Boss Katana Head MkII 100-Watt Guitar Amp Head / Combo 5" Speaker


96 out of 100. Incorporating 375+ ratings and reviews.

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Boss Katana Head MkII

The Boss Katana MkII series is rating highly in the market, so much so that three of their 100W models made it in this 2021 edition.

This 100-Watt Amp Head takes the same technology found in the combo version, and packs it in an amp head configuration which you can pair with your preferred speakers. But what sets this one apart is the inclusion of an internal 5" speaker - which together with the built-in power attenuator, allows for getting good tones at low volume levels.

Everything else follows the tried and tested Katana formula, at the core of which are five amp voicings that include Clean, Crunch, Lead, Brown and Acoustic. MkII adds in a variation switch that modifies the five voicings, essentially expanding your amp tone options to 10.

As mentioned above, it comes with built-in power attenuator, that lets you switch from 100W, to 50W, all the way down to 0.5W.

As expected, it comes with Boss effects derived from the companies popular stompboxes and guitar processors.

Other noteworthy features include effects loop and power amp input.


  • Power: 100W (Power Attenuator: 50W, 0.5W)
  • Channels: 4
  • Amp Models: 10
  • Effects: 60 Boss Effects
  • Input: 1 x 1/4, 1 x 1/4" (Power Amp), 1 x 1/8" (Aux)
  • Outputs: 2 x 1/4" (Line/Speaker), 1 x 1/4" (Headphones/Rec)
  • Weight: 19.4 lbs.

Many consider the 5" internal speaker as the best asset of this amp head, making it very versatile, and more importantly making it more friendly to guitarists who are stuck at home. There are reviewers who use the 5" speaker exclusively and are happy with the tones, while those who use it as an amp head are happy to have a low volume option built into the amp head. It's also worth noting that many users find Katana MkII amp head to be easy to use, which is surprising given the many features it houses.

There are a few complaints regarding the software editor, which they say is hard to configure or not working at all for some users.

The Boss Katana Head MkII Amp Head is a bedroom friendly amp that you can take on stage, highly recommended especially in today's stay at home restrictions.