Bad Boy Boogie amp settings — Marshall JCM900
The AC/DC guitar tone for “Bad Boy Boogie”, dialed in for a Marshall JCM900 with a Gibson SG Standard 61. Studio version, Let There Be Rock (1977) — Australian Albert Productions edition
1967-68 Gibson SG → Schaffer-Vega Diversity wireless system → 1959 Marshall Super Lead Plexi (full blast) → 4x12 cabs
| Knob | Setting (0–10) |
|---|---|
| Gain | 7 |
| Bass | 6 |
| Mid | 7 |
| Treble | 7 |
| Presence | 6 |
| Reverb | 0 |
| Master | 6 |
JCM900 has more preamp gain than a Plexi, so gain is set to 7 instead of diming it (Angus relied on power amp saturation from a cranked non-master-volume head). Mids stay high because both amps are mid-forward Marshalls. The Schaffer-Vega's boost effect is approximated by running the JCM900's preamp into moderate power amp drive — keep master volume at 6 to avoid excessive stage volume while maintaining compression.
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These settings are for a Marshall JCM900. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.
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