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Custom Harmonicas by Andrew Zajac
The most expressive harmonicas

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Andrew's Harmonicas

Custom Harmonicas:
I customize diatonic harmonicas to connect deeply with the player. Each instrument is remarkably responsive, has amazing tone and tuning, and is adjusted to your playing style.
My harmonicas are loud. They've got fat tone. They allow effortless bending of notes.
Custom harmonica information page.
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Custom Harmonica Combs:
Darken your harmonica with one of my combs. My Dark combs™ are measurably better than factory-made combs. They are made from environmentally-responsible materials. They are beautiful, durable, airtight, waterproof and comfortable to play.
Dark combs page
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Harmonica tools and customization instruction:
Getting your harmonica to perform best is meticulous work. I offer a complete set of innovative tools. I offer learning products that help you tackle the learning curve of upgrading and customizing your harmonica.
After years of work, I'm still excited about the process! I'm learning new things all the time. I update my tools and learning materials continuously.
Tools page

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Hand Made

My custom harmonicas, combs and tools are made to order.
Production times are 16 business days or less for combs and tools.
Current production time for custom harmonicas are shown on the top of the custom page.
Thanks for your support.
Andrew

Selected blog posts

  1. (video) Harmonica repair mistakes! #3 - Tuning by numbers
    8 years 7 months ago
  2. (video) Harmonica repair mistakes! #2 - Embossing therapy
    8 years 7 months ago
  3. (video) Harmonica repair mistakes! #1 - We got a man down!
    8 years 7 months ago
  4. Checklists
    8 years 8 months ago
  5. Please to not clean your harmonica with alcohol
    8 years 10 months ago
  6. How to install a comb (it's very easy!)
    8 years 10 months ago
  7. Hohner Affiliated Customizer Program
    9 years 1 month ago
  8. (video) Plinking thinking
    9 years 3 months ago
  9. (video) Flattening the draw reed plate
    9 years 3 months ago
  10. (video) Basic Tool Kit for Basic Diatonic Harmonica Adjustments
    9 years 4 months ago
  11. (video) Overblows and harps
    9 years 4 months ago
  12. FIXED! One in a thousand WORST harmonica reed plates!
    9 years 5 months ago
  13. Basic Tool Kit
    9 years 7 months ago
  14. Comb Tool™
    9 years 7 months ago
  15. Reed work PDF download
    9 years 7 months ago
  16. More Better - ultra precision tuning
    9 years 9 months ago
  17. The F Tool™
    9 years 11 months ago
  18. Harmonica Repair Basics
    9 years 11 months ago
  19. Mysterious embossing instructions - Can you see the light?
    10 years 3 months ago
  20. Tweaking harmonicas: Measure what you change
    10 years 5 months ago
  21. Research and development of optimized combs
    10 years 10 months ago
  22. Acrylic (Plexiglass) harmonica parts
    10 years 11 months ago
  23. Playing a harp while giving out advice
    11 years ago
  24. Video: Replace Marine Band nails with screws and install new comb
    11 years 2 months ago
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Custom diatonic harmonicas, Hohner Affiliated Customizer.
I customize Hohner Marine Band, Rocket, Special 20, and Golden Melody harmonicas.
Andrew Zajac, Kingston Ontario, Canada.
I use a continuous quality improvement process. I use regular evaluation and incremental steps to strive for constant improvement.
Website, text, photos, videos, download documents, designs and products by Andrew Zajac are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
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Copyright © 2025 Andrew Zajac - All rights reserved