Tone library / Metallica / Anesthesia Pulling teeth

Anesthesia Pulling teeth amp settings — Zoom B1X Four

The Metallica guitar tone for “Anesthesia Pulling teeth”, dialed in for a Zoom B1X Four with a Sterling by Music Man StingRay Ray4. Studio version, Kill 'Em All (1983) - Bass solo lead

Original rig

Rickenbacker 4001 (modified with Gibson mudbucker & Seymour Duncan pickup) into Morley Power Wah Boost and EHX Sovtek/Russian or V3 Big Muff Pi into Sunn Coliseum / Acoustic 370 amp

Saturated, aggressive mid-forward fuzz bass with pronounced wah sweep and fingerstyle attack

Amp settings — Zoom B1X Four

CHANNELMONO P (Acoustic 370 Bass Preamp Model) + 1x18 Cab BlockBRIGHTon

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

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Guitar

PICKUPbridge TONE8 VOLUME10

Signal chain

01Zoom B1X Four: Bass Wah (Expression Pedal)

Expression pedal assigned to Wah sweep; heel back for mellow throat, toe forward for biting lead scream

Pedal 5 · Tone 7 · Level 8

02Zoom B1X Four: Bass Muff (EHX Big Muff Pi model)

Primary fuzz distortion source; set Bal/Blend to retain core tone while saturating

Gain 8 · Tone 6 · Level 7

Why these settings

The StingRay Ray4 active humbucker hits the input hotter than Cliff's modified Rickenbacker, so roll the bass preamp EQ slightly neutral on the instrument to keep the fuzz from becoming flubby mud. We run the Zoom B1X Four's Bass Wah into the Bass Muff block followed by the MONO P (Acoustic 370) amp model to reproduce the classic early 80s Cliff Burton signal path entirely onboard. Boost your amp model's mids to cut through the fuzz clipping and replicate his horn-like sustain. Clean intro: bypass the Bass Muff block while sweeping the wah gently.

PRO TIPCliff plucked hard with index and middle fingers right over the bridge pickup and let his fingernails graze the strings to inject sharp upper-harmonic clank into the Big Muff.

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These settings are for a Zoom B1X Four. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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