Belief amp settings — Fender Twin Reverb

The John mayer guitar tone for “Belief”, dialed in for a Fender Twin Reverb with a PRS SE Custom 22. Live version, Where The Light Is (2008) – main song tone, not the Microsynth solo section

Original rig

Two-Rock Classic Reverb or Dumble-style amp, Fender Stratocaster with Big Dipper pickups (neck position), Ibanez TS-10 or TS808 Tube Screamer, Fulltone Fulldrive 2

Warm, singing neck-pickup lead with smooth midrange push and creamy sustain, touch-sensitive breakup

Amp settings — Fender Twin Reverb

BRIGHToff

Knob	Setting (0–10)
Gain	4
Bass	5
Mid	6
Treble	5
Reverb	3
Master	5

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Guitar

PICKUPneck TONE7 VOLUME8

Signal chain

01Tube Screamer style (TS9/TS808)

RECOMMENDED – not currently owned. Essential for the mid-push and compression that defines this tone. Run into the clean Twin.

Drive 4 · Tone 5 · Level 7

Why these settings

The Twin Reverb shares the high-headroom 6L6 clean platform Mayer uses, but lacks the Dumble/Two-Rock midrange complexity. Pushing mid to 6 compensates. Your PRS humbuckers are hotter and warmer than Mayer's low-output single coils, so gain stays at 4 and tone knob rolled to 7 to prevent muddiness. The Tube Screamer is non-negotiable for the singing sustain and mid-hump – without it, the Twin stays too clean and scooped.

PRO TIPRoll your guitar volume to 8 to clean up the attack and smooth the top end – Mayer rides his volume knob constantly for dynamics. Pick lightly over the neck pickup for that pillowy bloom, then dig in for the sustained notes.

Get this tone on your amp

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

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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.