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Home / Guitar Electronic Accessories / Marshall Amplifier Guitar Effect Knob Cap Audio Tone Potentiometer Rotary Switch Cap

Attributes

Brand -
Category Musical Instrument Accessories / Guitar Electronic Accessories
Origin -
Brand Compatibility Marshall, Fender, Vox
Material High-Impact Plastic
Color Black with White Line
Shaft Type Smooth Push-On
Shaft Diameter 6.35mm (1/4 inch)
Package Quantity 4 Knobs per Pack
Outer Diameter 18mm
Height 15mm
Weight 8 grams
Country of Origin China

5 reviews

A

Anonymous

Apr 07, 2026

Rating: 5/5

Perfect Replacement

These fit my old Marshall amp perfectly. The white line is bright and easy to see.

A

Anonymous

Apr 04, 2026

Rating: 5/5

Classic Look

Restored the vintage look of my practice amp. Highly recommend.

A

Anonymous

Mar 13, 2026

Rating: 5/5

Great Quality

Solid plastic, not cheap feeling. They stay on tight without slipping.

A

Anonymous

Mar 09, 2026

Rating: 5/5

Works on Pedals

Used these on my effects pedals instead of the amp. Fitment is standard.

A

Anonymous

Feb 12, 2026

Rating: 4/5

Good Value

One knob was slightly tighter than the others, but overall a good purchase.

5 FAQ

Q: Can I use these on a bass guitar amp?

A: Yes, they fit standard potentiometers found on most bass amps.

Q: Do you offer a warranty on these accessories?

A: Yes, there is a 30-day manufacturer defect warranty.

Q: Are these official Marshall brand parts?

A: These are compatible aftermarket accessories, not official OEM parts.

Q: Will these fit potentiometers with splined shafts?

A: No, these are designed for smooth shafts only.

Q: How many knobs are included in one order?

A: Each package contains 4 individual knobs.

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