
Our Process
Quality Control
SINGER implements strict quality management and holds ISO 9001 certification, covering design, R&D, mold development, production, manufacturing, delivery, and after-sales service. This end-to-end quality control system ensures reliable product quality for every unit shipped.


SINGER Lab is equipped with a full range of product reliability testing equipment, including headphone retention testers, UV aging chambers, button life testers, plug-in testers, abrasion testers, headphone pull testers, headphone rotation testers, cable tensile testers, cable flex testers, drop testers, constant temperature/humidity chambers, headphone expansion testers, speaker analyzers, polarity testers, audio analyzers, sweep frequency generators, and F0 high-speed testers to meet all product reliability testing requirements

