Holy wars amp settings — Boss Katana 100 MkII

The Megadeth guitar tone for “Holy wars”, dialed in for a Boss Katana 100 MkII with a Jackson Pro Series Rhoads. Studio version, Rust in Peace (1990)

Original rig

Marshall JCM800 2203 head, Jackson with Seymour Duncan JB (bridge), MXR Six Band EQ in chain

Tight aggressive thrash rhythm with scooped-but-present mids, cutting high-end attack

Amp settings — Boss Katana 100 MkII

CHANNELBrownBRIGHToffBOOSToff

Knob	Setting (0–10)
Gain	7
Bass	6
Mid	4
Treble	7
Presence	5
Reverb	0
Master	7

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Guitar

PICKUPbridge TONE10 VOLUME10

Signal chain

01Boss Katana Built-in Graphic EQ (access via Tone Studio)

Emulates the MXR Six Band EQ Mustaine used for mid-scoop and high-end bite. Enable in Tone Studio effects chain before amp block.

100Hz 4 · 200Hz 5 · 400Hz 3 · 800Hz 4 · 1.6kHz 6 · 3.2kHz 7

Why these settings

The Katana's Brown channel is modeled on the JCM800, making it the direct match for this tone. Gain stays at 7 rather than pushing higher because the Katana's Brown voice compresses earlier than a real JCM800 at stage volume. Bass dropped from 7 to 6 because the Katana's low-end is slightly fuller than a cranked 800 through a 4x12.

PRO TIPMustaine's pick attack is critical to this tone—use a heavy pick (1mm+), angle it slightly, and strike closer to the bridge for that tight, percussive chunk on the palm-muted riffs.

Get this tone on your amp

These settings are for a Boss Katana 100 MkII. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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Song, artist and gear names are used to identify the tone being matched; ToneAdapt is not affiliated with or endorsed by the artists or manufacturers mentioned. Settings are AI-generated starting points — trust your ears.