miniDSP EARS PRO - Reference Headphone Test Fixture
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EARS PRO
Calibrated headphone test fixture, low noise ICP capsules, USB audio plug&play configuration, Configurable analog gain, Headphone amp/Analog out for all in one testing
1,800 USD
USB 2x2 Audio interface
YES / No additional charge<br>NOT REQUIRED / -USD-250
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Description
Specifications
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Application Notes
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EARS PRO
EARS PRO : Calibrated headphone test fixture, low noise ICP capsules, USB audio plug&play configuration, Configurable analog gain, Headphone amp/Analog out for all in one testing.
USD1800.00<br>InStock
Customer Support
Acoustic Measurement Tools
EARS PRO is a professional headphone test fixture for accurate, repeatable acoustic measurement in R&D and manufacturing applications. Based on the extensive feedback from the original EARS platform, we went back to the drawing board to design a no compromise, all in one testing jig. It pairs a sturdy, adjustable fixture and human‑like soft silicone pinna with IEC 60318‑4 couplers, unique per‑unit calibration files, and a precision 1/2" prepolarized measurement capsule for low‑noise, traceable frequency response.
The integrated USB Audio 2x2 (UAC2) interface with XMOS processing and ASIO drivers delivers low‑latency connectivity to Windows, macOS and Linux. Onboard electronics include low‑noise mic preamps, adjustable analog gain, an internal headphone amplifier and a stereo DAC. Together, they form a complete system for your testing application.
Engineered for headphone R&D, production QA and calibrated binaural recording, EARS PRO ’s quick‑change adapters, precise positioning and robust build enable high‑throughput testing without sacrificing laboratory accuracy, providing manufacturers and labs a compact, traceable solution for objective and subjective evaluation.
WARNING : The USB 2x2 interface used in EARS PRO is a very specific interface for ICP microphones requiring low noise, high gain and correct phantom power supply (24V). A simple USB microphone preamp for audio recording isn't an acceptable replacement (E.g. RME/Motu..etc) as they could damage the microphone and void warranty. Please contact our support team first if you are planning for an alternative microphone interface so we can help guide your selection.
Note : Picture above includes the optional 2x2 USB audio interface.
Features
Reference Headphone test jig
1/2" prepolarized capsules
IEC60318-4 couplers
2x2 Plug&play USB audio interface for Win/Mac/Linux (Optional )
Low noise mic preamp with analog gain on DIP switch
Onboard headphone amplifier + DAC
Product Downloads
EARS Pro Product datasheet
EARS Pro User Manual
What's in the box?
1 x EARS Pro test jig
1 x EARS Pro USB Audio interface (if option selected)
BNC cables
1 x shielded USB cable (1.5m)
12V power supply (with EU/US/UK adaptors)
Unique Calibration File Download
All EARS PRO are calibrated with unique left and right calibration<br>files. To download the calibration files, look<br>for the 7 digit serial number found on the EARS PRO unit.
Enter the serial number in the form below (three digits then four digits e.g. 862-1001).
Your calibration files will automatically download in most browsers. If not, click on the links provided to manually download.
Serial number: -
Item
Description
Capsule type
1/2” prepolarized microphone
Sensitivity
13.5mV/Pa
Coupler applicable standards
IEC 60318-4
Frequency response
10Hz-20kHz
Calibration file for each microphone
Unique microphone calibration .txt file referenced to the Serial Number
Includes on axis Frequency / Amplitude / Sensitivity drift
Silicon human like pinna
Hardness 35 Shore OO
Test jig material
Aluminum fixture with heavy base to prevent noise transmission
Adjustments
7 positions (8mm pitch) for adjustment of the headband holder
8 positions (9mm pitch) for adjustment of the
Fully customizable width of ear to ear (100~200mm)
Additional mounting points
4 x holes on base plate for mounting on test bench
3 x holes on base plate for mounting mouth simulator (not included)
Ear plate diameter
120mm
Dimensions (H x W x D) mm
41.5 x 214.5 x 206 mm
USB interface (OPTIONAL)
Item
Description
USB Audio Controller
XMOS 500MHz multicore processor, USB Audio Class 2 (UAC2)<br>32bit 44.1~192kHz sample rate
Window ASIO driver provided, Linux/OSx plug&play
Sample rate and resolution
24bit @ 48kHz
Analog to Digital Converter
32bit ADC with embedded PGA for up to 45dB analog gain<br>Maximum 4Vrms, 0dB gain, 140dB SPL
30kΩ input impedance<br>THD+N 108dB<br>BNC input connector
Microphone preamplifier
ICP mode<br>IEPE Bias 24V, 4mA (constant current)
Analog gain
Dip switch controls analog input gain: 0~45dB gain in 3dB increments
Digital to Analog Converter
CS43131
Stereo Analog output
Unbalanced RCA connector<br>Maximum output 2Vrms
THD+N...