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Project Resonator

The Open-Source IEM | A love letter to the IEM/CIEM hobby

What is Project Resonator?

Project Resonator is a comprehensive knowledge base and resource repository for the complete design cycle and engineering development of in-ear monitors (IEMs). The project bridges the gap between hobbyist curiosity and professional-grade IEM development by providing both technical resources and educational foundations needed to understand and create high-fidelity audio devices.

Comprehensive Guides

Step-by-step tutorials covering everything from driver selection to crossover design and tuning. Whether you're a first-time DIYer or an experienced enthusiast, you'll find resources to help you build high-fidelity IEMs.

Open-Source Design

All design files, schematics, and documentation are freely available. Use these files as a base for your own projects—commercial or personal. Built with the open-source spirit in mind.

Tools & Software

Learn to use professional tools like VituixCAD for crossover simulation, KiCad for PCB design, and Fusion 360 for shell modeling. Complete setup guides included for all required software.

Open-Source Collaboration

The open-source nature of this project allows the community to contribute to a centralized knowledge base, helping others in the same pursuit by:

  • Improving and expanding existing documentation
  • Contributing additional design files and measurement data
  • Sharing novel tuning approaches and manufacturing techniques
  • Building supplementary tools and resources for IEM development

Project Resonator serves as a living resource that evolves with the IEM community, fostering innovation through shared knowledge and collaborative development.

To learn more about contributing, see the Contribution Guide. For licensing information, visit Project Licensing and Usage (CERN-OHL-W).

Project Resonator represents a love letter to the IEM/CIEM hobby and community—an effort to demystify high-fidelity audio engineering and empower the next generation of audio enthusiasts and innovators.

— Daksh Kaul (DriftingOtter)

Special thanks to the Head-Fi DIY community, Kozh, Kirby Meets Audio, and Crinacle for the inspiration.