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. What are the steps to customizing a harmonica?
    6 years 2 months ago
  2. WARNING / GUARANTEE
    6 years 4 months ago
  3. Comb Density
    6 years 4 months ago
  4. Forget about temperament! Freestyle tuning with the Tuning Card
    6 years 4 months ago
  5. Using the French Tuner™
    6 years 5 months ago
  6. The Gapping Paradox
    6 years 7 months ago
  7. What happened to breath control in the 1960s?
    6 years 9 months ago
  8. Popular altered tunings
    6 years 10 months ago
  9. The differences between Basic, Full and Overbend Custom harmonica (and let's talk about screws)
    6 years 10 months ago
  10. Question about tuning a harmonica "correctly'
    6 years 10 months ago
  11. Vintage Hohner reeds
    7 years ago
  12. Quick Customizing Videos for the diatonic harmonica player
    7 years ago
  13. Q&A questions from Facebook 2018/11 video 1 of 3
    7 years 1 month ago
  14. Q&A questions from Facebook 2018/11 video 2 of 3
    7 years 1 month ago
  15. Q&A questions from Facebook 2018/11 video 3 of 3
    7 years 1 month ago
  16. Get a grip! Eliminate the guesswork
    7 years 3 months ago
  17. Harmonica Customizing is Harmonica Rebuilding
    7 years 3 months ago
  18. Easy way to support the blow reeds while tuning using a Hockey Stick
    7 years 3 months ago
  19. Hohner Affiliated Customizer program at SPAH 2018
    7 years 3 months ago
  20. Before & After: Custom Marine Band Reed Plate
    7 years 4 months ago
  21. Tone Fibres
    7 years 4 months ago
  22. Overblow Science Question
    7 years 4 months ago
  23. Reed Replacement Screws and Washers
    7 years 5 months ago
  24. SilverWing 3-Space Reed Replacer System
    7 years 5 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 © 2026 Andrew Zajac - All rights reserved