One amp settings — Marshall JCM800 2203
The Metallica guitar tone for “One”, dialed in for a Marshall JCM800 2203 with a Sevilliana Jom 900. Studio version, ...And Justice for All (1988) — signature heavy machine-gun rhythm riff & solo section
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 bridge pickup, Roland JC-120 (clean intro)
| Knob | Setting (0–10) |
|---|---|
| Gain | 2 |
| Bass | 7 |
| Mid | 3 |
| Treble | 7 |
| Presence | 6 |
| Master | 5 |
01Sonicake Rockstage
Gain source — distortion section engaged (chorus and delay bypassed for rhythm). Run in front of amp input.
The JCM800 2203 is naturally mid-forward and lacks the saturated cascading gain and deep post-distortion graphic EQ scoop of Metallica's Mark IIC+. To emulate the signature tight, scooped Justice chunk, the Rockstage provides the high-gain distortion stage directly into the amp's High input with amp preamp gain lowered to 2 to prevent muddy double-gain staging. Amp mids are pulled down to 3 while bass and treble are pushed to replicate the iconic Mesa 5-band V-curve. For the clean intro, bypass the Rockstage distortion and engage its chorus block.
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These settings are for a Marshall JCM800 2203. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.
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