Fat Lip amp settings — Positive Grid Spark 40

The Sum 41 guitar tone for “Fat Lip”, dialed in for a Positive Grid Spark 40 with a ESP LTD EC-256. Studio version, All Killer No Filler (2001) — main riff and rhythm

Original rig

Marshall JCM800 2203 into Marshall 4x12 with Celestion Vintage 30s, Gibson/custom guitars with EMG 81 active humbucker and Seymour Duncan JB

Tight, punchy pop-punk crunch with aggressive midrange bark and fast palm-mute response

Amp settings — Positive Grid Spark 40

CHANNELBritish 800 (Marshall JCM800 model) + 4x12 V30 cab IRBOOSToff

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

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Guitar

PICKUPbridge TONE10 VOLUME10

Signal chain

01Onboard Overdrive (Screamer block)

Onboard Spark drive block used strictly as a clean boost to tighten the low end for palm-muting

Gain 0 · Tone 6 · Level 8

02Onboard Noise Gate

Essential for cutting dead silence between the staccato riff stabs

Threshold 6 · Decay 2

Why these settings

The Spark 40 faceplate lacks a dedicated physical presence knob, so highs and edge are shaped via the treble control and the onboard Screamer boost. The ESP LTD EC-256 passive bridge humbucker has slightly less output and compression than the active EMG 81 used on the record, so the onboard Screamer level is pushed to 8 with gain at zero to tighten the attack. Setting the mids forward at 8 matches the signature cutting JCM800 bark through Vintage 30 speakers. Clean intro/break: switch to the onboard Black Duo amp model with bridge+neck pickups.

PRO TIPAnchor your palm firmly against the bridge saddles and dig in hard with a heavy 1.0mm+ pick; the percussive attack of the opening riff relies entirely on aggressive downstrokes and instant muting.

Get this tone on your amp

These settings are for a Positive Grid Spark 40. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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