Can't Stop (Red Hot Chili Peppers) bass tone and bass amp settings

Can't Stop bass tone on a Fender Rumble 40 V3: low gain (Gain 4.5), forward high-mids (High Mid 2), balanced lows (Bass 1), bridge J pickup.

The original gear on this recording is not documented by a source we trust.

Settings for your amp

Pick a reference amp

Can't Stop settings on a Fender Rumble 40 V3

Fender Rumble 40 V3 settings for every song

AmpFender Rumble 40 V3

Gain4.5
BrightOn
ContourOff
VintageOff
OverdriveOff
Bass+1
Low Mid0
High Mid+2
Treble+1
Set to your roomMaster

BassPassive P/J bass

Neck Volume (P)6Adds low-mid body beneath the brighter bridge pickup.
Bridge Volume (J)10Emphasizes articulation and growl for the bassline.
Tone9
The same settings in text

Amp

Gain
4.5
Bright
On
Contour
Off
Vintage
Off
Overdrive
Off
Bass
+1
Low Mid
0
High Mid
+2
Treble
+1
Master
Set to your room

Passive P/J bass

Neck Volume (P)
6
Bridge Volume (J)
10
Tone
9

Can't Stop settings on an Ampeg Rocket Bass RB-108

Ampeg Rocket Bass RB-108 settings for every song

AmpAmpeg Rocket Bass RB-108

SGTOff
Set to your roomVolume
Bass0
Midrange+2
Treble+1

BassPassive P/J bass

Neck Volume (P)7Blend in body beneath the bridge pickup’s attack
Bridge Volume (J)10Emphasize the tight, bright slap articulation
Tone10
The same settings in text

Amp

SGT
Off
Volume
Set to your room
Bass
0
Midrange
+2
Treble
+1

Passive P/J bass

Neck Volume (P)
7
Bridge Volume (J)
10
Tone
10

Can't Stop settings on any bass amp with Bass, Mid, Treble, Drive

Amp

Bass6
Mid7
Treble7
Drive2

BassPassive P/J bass

Neck Volume (P)6Adds some round low-mid body beneath the bridge pickup.
Bridge Volume (J)10Dominant for a tighter, brighter, more cutting attack.
Tone8
The same settings in text

Amp

Bass
6
Mid
7
Treble
7
Drive
2

Passive P/J bass

Neck Volume (P)
6
Bridge Volume (J)
10
Tone
8

An active bass preamp could better approximate Flea’s active-bass response.

The control panel of a vintage guitar amplifier, close up

Questions

What are the Can't Stop settings on a Fender Rumble 40 V3?

For the Can't Stop bass tone on a Fender Rumble 40 V3, set Gain 4.5, Bright On, Bass +1, Low Mid 0, High Mid +2, Treble +1; on the passive P/J bass, Neck Volume (P) 6, Bridge Volume (J) 10, Tone 9. Set Master to your room. They are AI-assisted starting points; adjust them by ear on your own amp.

What are the Can't Stop settings on an Ampeg Rocket Bass RB-108?

For the Can't Stop bass tone on an Ampeg Rocket Bass RB-108, set Bass 0, Midrange +2, Treble +1; on the passive P/J bass, Neck Volume (P) 7, Bridge Volume (J) 10, Tone 10. Set Volume to your room. They are AI-assisted starting points; adjust them by ear on your own amp.

Can I get the Can't Stop tone on my own amp?

Yes. The settings above cover 2 reference amps and any amp with the basic controls. For your exact rig, KnobMaster, an iPhone app, sets every knob of your own amp, bass and pedals for Can't Stop, using only the controls your gear has.

Get it for your exact rig

KnobMaster sets every knob of your own amp, bass and pedals for this song.

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Settings are AI-assisted starting points, updated on October 18, 2026.

Photographs: “A close view of a vintage guitar amplifier”, Shixart1985, CC BY 2.0, Wikimedia Commons.

Fender, Ampeg and the other gear names on this page are trademarks of their owners; KnobMaster is not affiliated with them.