One amp settings — Fender Mustang LT25

The Metallica guitar tone for “One”, dialed in for a Fender Mustang LT25 with a Fender American Ultra Stratocaster. Studio version, ...And Justice for All (1988) — iconic clean intro & verses

Original rig

Roland JC-120 Jazz Chorus, ESP MX-220 with EMG 60 (neck), built-in stereo chorus

Pristine, chorus-treated, slightly scooped high-headroom 80s clean

Amp settings — Fender Mustang LT25

CHANNELTwin Clean amp model (or preset 02 Clean Twin) with onboard Chorus and Hall ReverbBRIGHTonBOOSToff

Knob	Setting (0–10)
Gain	2
Bass	6
Mid	4
Treble	7
Reverb	3
Master	5

Don’t have a Fender Mustang LT25? See this song on other amps → Match your own rig →

Guitar

PICKUPneck TONE10 VOLUME10

Signal chain

01Onboard Mustang Chorus FX Block

Engage the built-in Chorus block in the Mustang LT25 signal chain to emulate the Roland JC-120 chorus

Rate 4 · Depth 6 · Level 5

Why these settings

The Fender Mustang LT25 does not feature an external presence knob, so it is set to null. Using the Twin Clean model provides the ultra-clean, high-headroom platform of James Hetfield's Roland JC-120, while the onboard chorus block re-creates the iconic stereo shimmer. To balance the brighter single-coil pickups on your Stratocaster against Hetfield's active EMG 60 neck pickup, the midrange is scooped to 4 with the bass kept at 6 for warm body.

PRO TIPPick cleanly with a rigid heavy pick directly over the middle pickup rather than close to the bridge to achieve the round, pristine attack heard on the opening arpeggios.

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.