GuitarDistortedRiff80% confidence
I Thought I Knew It All Riff Guitar Tone Settings — Megadeth
Megadeth · 1990s · metal
studio
Original Recording
Guitar
Jackson King V (likely custom shop, early-mid 1990s spec)
Pickups
Seymour Duncan JB (SH-4) bridge humbucker
Amp
Marshall 6100LM (Marshall Anniversary head, used on Youthanasia sessions)
Pickup Position
Bridge pickup
Studio recording, 1994. Dave Mustaine used Jackson King V guitars with Seymour Duncan JB pickups for rhythm tracks on 'Youthanasia'. The Marshall 6100LM was confirmed as the main amp for this album's rhythm tones. No evidence of live or modern digital rigs for this era/song. No evidence of additional boost/OD pedals for the main riff section.
Amp Settings
Mids5
Bass6
Gain7.5
Reverb1
Treble7
Presence6
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Tone Character
- tight and percussive
- aggressive palm muting
- saturated but clear
- articulate note separation
- focused low end
- slightly scooped mids
- crisp treble bite
- minimal ambience
- classic thrash rhythm
- high-gain saturation
Notes & Caveats
- No direct source lists exact amp knob settings for 'I Thought I Knew It All'; settings estimated based on typical Marshall 6100LM usage for 90s Megadeth rhythm tones.
- No evidence of pedals or effects used on the main riff section; no audible modulation, delay, or reverb beyond subtle amp reverb.
- Guitar and pickup confirmed for Youthanasia era, but not for every individual song—however, all evidence points to Jackson King V with Seymour Duncan JB for main rhythm.
- No evidence of effects loop or additional rack effects for this section.
- Settings cross-referenced with genre and era conventions for accuracy. Megadeth's 'Youthanasia' era tones are tight, high-gain, and scooped, with clear attack and minimal ambience. The settings reflect Dave Mustaine's typical use of high gain, tight bass, scooped mids, and bright, present highs for articulate, aggressive riffing, with a dry, in-your-face mix.