Raining blood amp settings — Boss Katana 50 MkII

The Slayer guitar tone for “Raining blood”, dialed in for a Boss Katana 50 MkII with a Gibson Les Paul Classic. Studio version, Reign in Blood (1986)

Original rig

Marshall JCM800 2203 (boosted) + B.C. Rich Mockingbird/Bich (DiMarzio Super Distortion)

Aggressive, razor-sharp thrash crunch with tight lows and cutting upper-mid bite

Amp settings — Boss Katana 50 MkII

CHANNELBrown amp typeBOOSTon

Knob	Setting (0–10)
Gain	7
Bass	5
Mid	7
Treble	8
Reverb	0
Master	6

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Guitar

PICKUPbridge TONE10 VOLUME10

Why these settings

The Katana 50 MkII Brown channel emulates the hot-rodded Marshall JCM800 tone Kerry King and Jeff Hanneman used on the record. Enabling the Katana's onboard Booster simulates the front-end EQ boost they used to tighten up the bass and push the preamp into aggressive thrash saturation. The presence knob is set to null because the Katana 50 faceplate physically lacks one.

PRO TIPUse heavy, aggressive downpicking near the bridge saddles with a stiff pick (1.0mm+) to nail the percussive, mechanical attack of the opening gallop riff.

Get this tone on your amp

These settings are for a Boss Katana 50 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.