Tone library / Red Hot Chili Peppers / Under the Bridge

Under the Bridge amp settings — Marshall DSL40CR

The Red Hot Chili Peppers guitar tone for “Under the Bridge”, dialed in for a Marshall DSL40CR with a Fender Player Stratocaster. Studio version, Blood Sugar Sex Magik (1991) intro & verse

Original rig

1966 Fender Jaguar / 1962 Fender Stratocaster into Marshall Major 200W / Silver Jubilee 2555 with MXR Dyna Comp

Snappy, percussive, glassy vintage clean with high presence and subtle compression

Amp settings — Marshall DSL40CR

CHANNELClassic Gain (Clean mode)BOOSToff

Knob	Setting (0–10)
Gain	3
Bass	5
Mid	6
Treble	7
Presence	6
Reverb	2
Master	5

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Guitar

PICKUPneck+middle TONE10 VOLUME10

Signal chain

01Behringer CS400 Compressor Sustainer

Direct into front input to clamp transients and add percussive snap

Level 7 · Tone 6 · Attack 4 · Sustain 5

Why these settings

The DSL40CR Classic Gain Clean channel provides the wide-headroom Marshall clean platform John Frusciante achieved with high-wattage Major and Jubilee heads. Dialing gain low keeps the signal pristine while the slight bump in treble and presence reproduces the chime of vintage low-output single coils. The Behringer CS400 mimics the subtle studio compression, evening out the thumb-over-the-neck embellishments. Outro chorus: engage the Boss DS-2 Turbo Distortion for the heavy climax.

PRO TIPFret the barre chords with your thumb wrapping around the top of the neck to anchor the bass notes, and use aggressive downward index-finger strums while muting adjacent idle strings with your fretting fingers for the signature percussive snap.

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These settings are for a Marshall DSL40CR. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.

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