Tone library / Red Hot Chili Peppers / Can't Stop

Can't Stop amp settings — Boss Katana 50 MkII

The Red Hot Chili Peppers guitar tone for “Can't Stop”, dialed in for a Boss Katana 50 MkII with a PRS SE Custom 24. Studio version, By the Way (2002) - Main Riff / Rhythm Tone

Original rig

1962 Fender Stratocaster / 1960 Telecaster Custom into Boss CE-1 Preamp and Marshall Major / Silver Jubilee clean edge-of-breakup

Bright, percussive, funky edge-of-breakup attack with snappy presence and tight low-end

Amp settings — Boss Katana 50 MkII

CHANNELCrunch Amp TypeBOOSToff

Knob	Setting (0–10)
Gain	4
Bass	5
Mid	6
Treble	7
Reverb	2
Master	6

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Guitar

PICKUPneck+middle TONE9 VOLUME10

Signal chain

01Boss CE-1 Preamp / Clean Boost (Katana Onboard Booster: Blues Drive)

Enable the onboard Katana Booster (Blues Drive model) to emulate the Boss CE-1 preamp stage pushing the Marshall clean channel

Drive 2 · Tone 6 · Level 7

Why these settings

The Crunch voicing emulates John Frusciante's pushed Marshall front end, while keeping gain low preserves clarity for dynamic funk digging. To match the thin, snappy single-coil bite of Frusciante's vintage Strats on your PRS SE Custom 24 humbuckers, pull the coil-split switch if equipped (or use the middle/split position) and bump the treble to 7. Keep Katana 50 MkII presence null as the faceplate does not feature a dedicated presence pot.

PRO TIPFrusciante plays the signature main riff by aggressively strumming across all six strings while muting the unplayed strings with his fretting-hand thumb and index finger; the percussive rake is vital to getting the recorded attack.

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These settings are for a Boss Katana 50 MkII. 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.