miniDSP EARS Calibrated Headphone Test Fixture

The miniDSP EARS Headphone Test Fixture is a precision measurement tool designed to bring laboratory-grade acoustic analysis to your workspace. Whether you are developing new headphone designs, performing quality control checks on production units, or simply verifying the performance of your personal collection, this fixture delivers reliable, repeatable results. Its compact form factor and USB-powered operation make it an ideal companion for engineers, audio enthusiasts, and repair technicians alike.

At the heart of the EARS fixture lies a 6 mm electret condenser capsule capable of handling sound pressure levels up to 133 dB, with a frequency response spanning 20 Hz to 20 kHz. The device connects via USB-B and operates as a USB Audio Class 1.0 interface, processing audio at 24-bit resolution with sample rates of 44.1 or 48 kHz. The silicone housing provides acoustic isolation and durability, while the included individual calibration file ensures accurate frequency, amplitude, and sensitivity measurements. Powered entirely through the USB connection, this fixture offers a straightforward, plug-and-play solution for objective headphone analysis, enabling you to measure frequency response and distortion with confidence.