Tone library / Metallica / Master of Puppets

Master of Puppets amp settings — Gear4music G4M GA-15

The Metallica guitar tone for “Master of Puppets”, dialed in for a Gear4music G4M GA-15 with a Yamaha Pacifica 112V. Studio version, Master of Puppets album (1986)

Original rig

Mesa/Boogie Mark IIC+ preamp → Marshall JCM800 100W power amp → Marshall 4x12, ESP Explorer with EMG 81 bridge pickup

Tight, aggressive, scooped-mid thrash rhythm with razor-sharp pick attack and crushing low end

Amp settings — Gear4music G4M GA-15

CHANNELOverdrive channel (if available) or single channel cranked

Knob	Setting (0–10)
Gain	10
Bass	7
Mid	2
Treble	8
Presence	6
Reverb	0
Master	5

Don’t have a Gear4music G4M GA-15? See this song on other amps → Match your own rig →

Guitar

PICKUPbridge TONE7 VOLUME10

Signal chain

01Distortion pedal (e.g., Boss DS-1, Pro Co RAT, or Boss MT-2)

RECOMMENDED — not currently owned. The GA-15 practice amp cannot produce the tight high-gain saturation needed for this tone on its own. A distortion pedal is essential. If using a distortion pedal, set amp gain to 3-4 and use the clean channel to avoid mud.

Level/Volume 7 · Tone 6 · Distortion/Gain 8

Why these settings

The original uses a high-gain tube amp stack worth thousands; the GA-15 is a budget solid-state practice amp that will not produce this tone without a distortion pedal. I maxed the amp gain and scooped mids to approximate the Mark IIC+ character, but the tight low-end punch and harmonic saturation will be absent. Your Pacifica's Alnico V humbuckers are lower output and brighter than EMG 81s, so I pushed treble +1 and bass +1.5 vs original settings to compensate.

PRO TIPHetfield's tone is 50% technique—use aggressive, consistent downpicking with your pick angled slightly and palm-mute tight against the bridge. This creates the percussive 'chug' that defines the riff. Without a distortion pedal, this will sound thin; a used Boss DS-1 or Joyo Ultimate Drive for under $30 gets you far closer than any amp setting can.

Get this tone on your amp

These settings are for a Gear4music G4M GA-15. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

Get ToneAdapt on Google Play

Find your amp

Browse

Master of Puppets on other ampsSAME SONG, YOUR AMP Metallica tonesALL SONGS Yamaha Pacifica 112V tonesSAME GUITAR Tone libraryEVERYTHING

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.