4 Channel Acoustic Test Interface with 2 channel impedance measurement

The Echo AIO-S2 is a 4-channel acoustic interface designed for production-line testing and QA/QC verification. Combining four 10W amplifier outputs and four mic/line analog inputs in a single unit, the AIO-SA is an integrated, cost-effective, and reliable high-throughput audio test solution. Two of the amplifier outputs include a 0.1 Ohm sense resistor to facilitate 2 channel impedance measurements. Four additional line inputs are dedicated to voltage monitoring (VMON) and current monitoring (IMON)
for each impedance measurement output.

Each input can be individually configured as a line level input or as a measurement microphone input. Microphone inputs include an IEPE microphone conditioning amplifier with integrated constant current power supply (CCP).

The AIO-SA presents a standard USB audio sound card interface and is compatible with most audio test software including APx Flex, LabVIEW, Soundcheck, and ARTA.



4 IEPE microphone / line inputs with TEDS

2 amplifier outputs

Locking universal power connector

2 amplifier outputs with impedance measurement

Locking USB 2.0

USB 2.0 audio with locking connector



Sample rates48 kHz, 96 kHz, and 192 kHz
USBUSB 2.0 audio class compliant
Supported operating systemsWindows 7 or later
Audio APIsASIO, WASAPI, CoreAudio
AC PowerUniversal power supply
90 - 264 VAC at 50 or 60 Hz
Input impedance1 MΩ
Input gain1x, 10x, and 100x
Full-scale input voltage (1x gain)8.75 Vpk
Maximum input voltage15 Vpk (do not exceed)
Dynamic range (1x gain, A-weighted)> 110 dB
THD+N (1x gain, A-weighted)< -95 dB (20 Hz – 20 kHz)
Frequency response±0.5 dB (20 Hz – 20 kHz)
Constant current supply4 mA, 21 V excitation voltage
TEDSIEEE 1451.4 Class 1
Output power (THD+N < .1%)10 W continuous at 1 kHz
Maximum output voltage13.5 Vpk
Frequency response±0.5 dB 20 Hz – 20 kHz
Frequency response±0.5dB 20 Hz – 20 kHz
Full-scale input voltage17.5 Vpk
Full-scale input current8.75 Apk
THDN (1x gain, A-weighted)< -95 dB 20 Hz – 20 kHz

The SPKR connector is both an amplified output and a voltage/current monitoring input for impedance measurement.

Single unit
17.5” (44.4 cm) x 8.75” (22.2 cm) x 1.75” (4.4 cm)
7.2 lbs (3.3 kg)
Single unit boxed with cables
21” (53 cm) x 10” (25.4 cm) x 5” (12.7 cm)
8.75 lbs (4 kg)
Shipping carton (6 AIOs)
22” (55.8 cm) x 22” (55.8 cm) x 17” (43.1 cm)
59.5 lbs (27 kg)

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