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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. What happened to breath control in the 1960s?
    6 years 1 month ago
  2. Popular altered tunings
    6 years 1 month ago
  3. The differences between Basic, Full and Overbend Custom harmonica (and let's talk about screws)
    6 years 1 month ago
  4. Question about tuning a harmonica "correctly'
    6 years 2 months ago
  5. Vintage Hohner reeds
    6 years 3 months ago
  6. Quick Customizing Videos for the diatonic harmonica player
    6 years 4 months ago
  7. Q&A questions from Facebook 2018/11 video 3 of 3
    6 years 5 months ago
  8. Q&A questions from Facebook 2018/11 video 2 of 3
    6 years 5 months ago
  9. Q&A questions from Facebook 2018/11 video 1 of 3
    6 years 5 months ago
  10. Get a grip! Eliminate the guesswork
    6 years 6 months ago
  11. Harmonica Customizing is Harmonica Rebuilding
    6 years 6 months ago
  12. Easy way to support the blow reeds while tuning using a Hockey Stick
    6 years 7 months ago
  13. Hohner Affiliated Customizer program at SPAH 2018
    6 years 7 months ago
  14. Before & After: Custom Marine Band Reed Plate
    6 years 7 months ago
  15. Tone Fibres
    6 years 8 months ago
  16. Overblow Science Question
    6 years 8 months ago
  17. Reed Replacement Screws and Washers
    6 years 8 months ago
  18. SilverWing 3-Space Reed Replacer System
    6 years 8 months ago
  19. Something to think about
    6 years 9 months ago
  20. The Assessment
    6 years 11 months ago
  21. Hohner reed plate serial numbers
    6 years 11 months ago
  22. Basic Kit with Grobet file
    7 years ago
  23. Short Slot Golden Melody combs
    7 years 1 month ago
  24. Custom comb for Steve Baker Special
    7 years 1 month 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