Tone library / Guns N' Roses / Knockin' On Heaven's Door

Knockin' On Heaven's Door amp settings — Marshall MG15G

The Guns N' Roses guitar tone for “Knockin' On Heaven's Door”, dialed in for a Marshall MG15G with a Harley Benton SC-450 CB Classic Series. Studio version, Use Your Illusion II (1991) — iconic lead guitar solos

Original rig

1987 Marshall Silver Jubilee 2555 / JCM800 (S.I.R. Stock #34 modded) + 1959 Gibson Les Paul Standard replica (Seymour Duncan Alnico II Pro pickups)

Warm, singing, mid-heavy saturated British crunch lead with rolled-off neck pickup top-end

Amp settings — Marshall MG15G

CHANNELOD (Overdrive) Channel

Knob	Setting (0–10)
Gain	7
Bass	6
Treble	5
Master	4

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Guitar

PICKUPneck TONE5 VOLUME10

Signal chain

01Analog / Digital Delay (e.g. Boss DD-3 or DD-8)

RECOMMENDED — not currently owned (set to ~350ms for Slash's studio lead space)

E.Level 3 · F.Back 3 · D.Time 5

Why these settings

The Marshall MG15G has a single Contour control rather than a Mid knob (mid is null), so set Contour to 4 to retain the crucial Marshall lower-mid bark without excessive mid-scooping. Because the 8-inch solid-state speaker can sound boxy and bright, keep Treble at 5 while pushing Gain to 7 on the OD channel for singing sustain. Since no physical mid, presence, or reverb controls exist on the MG15G faceplate, those values are omitted.

PRO TIPSlash's signature 'woman tone' lead sound comes from selecting the neck humbucker and rolling the guitar tone pot down to 5 (or lower), which rounds off harsh transients and yields that thick, flute-like sustain.

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