One amp settings — Fender Mustang LT25

The Metallica guitar tone for “One”, dialed in for a Fender Mustang LT25 with a Jackson Pro Series King V. Studio version, ...And Justice for All (1988) — signature heavy machine-gun rhythm riff & solo section

Original rig

Mesa Boogie Mark IIC+ slaved into Marshall power section with 5-band graphic EQ V-curve, ESP Explorer / Jackson King V with EMG 81 bridge pickup

Aggressive, razor-sharp scooped-mid thrash metal rhythm with tight low-end and biting top-end attack

Amp settings — Fender Mustang LT25

CHANNELMETAL 2000 amp model

Knob	Setting (0–10)
Gain	7
Bass	7
Mid	2
Treble	8
Master	6

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Guitar

PICKUPbridge TONE10 VOLUME10

Why these settings

The METAL 2000 model captures the aggressive, modern American high-gain saturation and tight low-end tracking of the original Mesa Mark IIC+ tone. Mids are set to 2 in the amp preset menu to replicate the iconic 5-band graphic EQ V-scoop, while treble is pushed to 8 for the signature cutting attack of James Hetfield's EMG 81 bridge pickup. Clean intro: switch amp model to TWIN CLEAN with mid 5 and enable the CHORUS effect block.

PRO TIPAggressive, precise downpicking directly over the bridge pickup with a heavy, sharp pick is mandatory to get the percussive, mechanical chug of the machine-gun riff.

Get this tone on your amp

These settings are for a Fender Mustang LT25. 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.