We use DLP-based 3D printing to produce consistent shell shapes and repeatable internal structures. This process helps us control fit, airflow, and internal volume in a way that is difficult to achieve with traditional one-piece molding. Our materials are selected with a focus on comfort, durability, and stable production results.

Great audio starts with well-matched components. EPZ develops and tunes key acoustic parts—such as diaphragm materials and magnetic circuit designs—and pairs them with shell geometry designed for the intended sound target. By testing and iterating the full system (driver + acoustics + shell), we aim for consistent performance across units and across batches.

Sound is science—and also careful listening. Our lab uses industry-standard measurement tools, including B&K Type 4128C head-and-torso simulators, alongside controlled test environments. We measure prototypes through multiple iterations and use the results to guide tuning, then verify the final signature with listening tests to balance objective data with real-world enjoyment.