One amp settings — Zoom G6

The Metallica guitar tone for “One”, dialed in for a Zoom G6 with a Gibson Les Paul Classic. Studio version, ...And Justice for All (1988) — signature heavy machine-gun rhythm riff & solo section

Original rig

Mesa Boogie Mark IIC+ (preamp slaved into Marshall power section with classic 5-band graphic EQ V-curve), ESP Explorer / Jackson King V with EMG 81 active humbucker, Roland JC-120 (clean intro)

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

Amp settings — Zoom G6

CHANNELKRAKEN amp model + 4x12 cab IRBRIGHToffBOOSToff

Knob	Setting (0–10)
Gain	7
Bass	6
Mid	3
Treble	7
Presence	6
Reverb	0
Master	6

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Guitar

PICKUPbridge TONE10 VOLUME10

Signal chain

01ZNR (Noise Gate block)

Essential in front of the amp model to keep the machine-gun staccato chugs dead silent between hits

Threshold 7 · Detect 5

02GraphicEQ (6-Band EQ block)

Placed after the amp model to recreate the Mesa Mark IIC+ post-gain 5-band graphic EQ V-curve scoop

100Hz 7 · 250Hz 5 · 630Hz 2 · 1.6kHz 4 · 4kHz 7

Why these settings

The Zoom G6's KRAKEN model captures the modern high-gain Mesa-style bite, but the iconic Justice tone comes entirely from post-preamp graphic EQ scooping around 630Hz-800Hz. Your Les Paul Classic passive pickups lack the compressed razor-sharp transient of Hetfield's active EMG 81, so keep the treble and presence at 7 and 6 while cutting the 630Hz mid slider hard. Clean intro: switch to the FD TWN amp block with onboard chorus and neck pickup.

PRO TIPAnchor your palm firmly against the bridge saddles and execute strict downpicking on every single chug; the machine-gun rhythm's tightness relies entirely on an aggressive pick strike paired with immediate, deadened string mutes.

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These settings are for a Zoom G6. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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