Boss Katana-100 Combo Guitar Amp (KTN-100) (Discontinued / Superseded)

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Gearank High Notes

Note: This has been superseded by the Boss Katana-100 MkII (KTN-100-2).


The Boss Katana 100 KTN-100 is a 100 Watt combo amplifier with built-in DSP (digital sound processing) and power attenuation.

Its coolest feature is its power attenuator, which lets you lower the power rating to half (50W) and can even go as low as 0.5W. This feature allows you to drive the amp harder at lower volumes, making it ideal for practice and recording.

This is in conjunction the amp’s multiple voicings, which includes standard Clean tone and various shades of overdrive – Crunch, Lead and Brown (high-gain). There’s also a nifty acoustic amp mode that is meant to complement acoustic-electric guitars.

As expected, this amp comes with digital recreations of Boss’ popular pedals, with a total of 55 currently available.

Note that you can load up to 15 effects on to the amp but you can only use up to 3 of them simultaneously.


  • Power: 100W (With Built-in Power Attenuation)
  • Speaker: 1 x 12″
  • Amp Modeling: 5 Amp “Characters”
  • Effects: 55 (Up to 3 Simultaneously)
  • Input: 1 x 1/4″, 1 x 1/8″ (Aux in)
  • Outputs: 1 x 1/4″ (Line Out), 1 x 1/4″ (Headphones/Rec out)
  • Weight: 32.69 lbs.


This model has been superseded by the MK II version so if you’d like to see which amps we currently recommend then take a look at our guide to The Best Guitar Amps Under $500.


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