One amp settings — Marshall Mg15r

The Metallica guitar tone for “One”, dialed in for a Marshall Mg15r with a Jackson JS22 Dinky. Heavy rhythm and machine-gun riff section, ...And Justice for All (1988 studio cut)

Original rig

ESP MX-220 (EMG 81 bridge) -> Mesa/Boogie Mark IIC+ (slaved, 5-band graphic EQ V-curve) -> Marshall 4x12 cab with Celestion V30s

Aggressive, dry, ultra-tight scooped thrash crunch with razor-sharp high-end attack

Amp settings — Marshall Mg15r

CHANNELOverdrive

Knob	Setting (0–10)
Gain	7
Bass	7
Mid	2
Treble	8
Reverb	2
Master	5

Don’t have a Marshall Mg15r? See this song on other amps → Match your own rig →

Guitar

PICKUPbridge TONE10 VOLUME10

Why these settings

The MG15R has a mid-forward Marshall voicing, so dropping Middle to 2 is essential to emulate the extreme 750Hz graphic EQ scoop used on ...And Justice for All. Treble is pushed to 8 and Bass to 7 to recreate the aggressive percussive bite of active EMG pickups through the Jackson high-output ceramic humbuckers. The MG15R lacks a presence control, so high-end clarity is achieved entirely through the treble pot.

PRO TIPAnchor your palm firmly against the bridge saddles and execute strict, heavy downstrokes for the rhythm chugs to get the authentic mechanical, percussive attack of the machine-gun riff.

Get this tone on your amp

These settings are for a Marshall Mg15r. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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More tones for the Marshall Mg15r

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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.