The BTone Tone Cap Tester takes the guesswork out of choosing the right tone cap for your guitar. Instead of soldering caps in and out over and over, you can test them outside the guitar in seconds.
- Plug your guitar into the input and your amp into the output.
- Clip in any capacitor to the alligator clips (any brand, any value).
- Roll the knob and instantly hear how it changes your tone.
Once you’ve found the cap that works for you, you can install it yourself — or have a tech do it — knowing you’ve made the right choice.
Why use the Tone Cap Tester?
- Test any capacitor without tools or soldering.
- Compare values like .015, .022, .033, .047 µF and beyond.
- Hear the differences between ceramic, film, paper-in-oil, etc.
- Avoid unnecessary soldering and wear on your guitar.
- Choose with confidence before committing.
Options:
- 250k audio taper pot → Standard for single-coils (Strat, Tele).
- 500k audio taper pot → Preferred for humbuckers (keeps more top end).
Features:
- Compact 3″ x 4″ PETG enclosure with BTone logo.
- ¼″ mono input and output jacks.
- Alligator clip lead for quick capacitor swaps.
- Passive design — no batteries needed.









