Left Behind amp settings — Boss Katana Air

The Slipknot guitar tone for “Left Behind”, dialed in for a Boss Katana Air with a Ibanez GIO GRG170DX. Studio version, Iowa (2001)

Original rig

Rivera KR-7 (channel 3) and Orange Rockerverb heads, Ibanez signature guitars with EMG 81/85 pickups, Boss NS-2 Noise Suppressor, tuned to Drop B

Tight, chunky modern metal rhythm with aggressive midrange bite and controlled low-end thump

Amp settings — Boss Katana Air

CHANNELBrown (amp type selector)BRIGHToffBOOSTon

Knob	Setting (0–10)
Gain	8
Bass	4
Mid	7
Treble	6
Presence	5
Reverb	0
Master	7

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Guitar

PICKUPbridge TONE8 VOLUME10

Signal chain

01Noise Gate (Katana built-in)

Essential for tight palm mutes and eliminating noise between riffs — use Boss Tone Studio to enable

Threshold 6

02Tube Screamer (Katana built-in booster)

Set via Boss Tone Studio — tightens low-end and adds pick attack definition like the pros use

Drive 1 · Tone 6 · Level 7

Why these settings

The Katana Air's Brown channel emulates Marshall-style voicing, which lacks the Rivera/Orange tight low-end scoop. Compensate by cutting bass to 4 (original rigs run bass around 5-6 but with tighter cab voicing) and pushing mids to 7 to replicate that aggressive cutting midrange Mick describes. Your GRG170DX has passive Infinity humbuckers with lower output than EMGs — the gain at 8 with the built-in TS boost compensates for this output gap while keeping the tone defined rather than muddy.

PRO TIPTune to Drop B if possible (B-F#-B-E-G#-C#) with heavy strings (.011-.054 minimum). If staying in standard tuning, the riff will sound thinner — palm mute harder and pick closer to the bridge to restore some of that percussive chunk.

Get this tone on your amp

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

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More tones for the Boss Katana Air

Unholy ConfessionsAvenged Sevenfold G.O.A.T.Polyphia unhappy (slowed)s0rrow Highway to HellAC/DC Sweet child o mineGuns n roses Prison SongSystem Of A Down

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