2 Channel Acoustic Test Interface with 1 channel impedance measurement


The Echo AIO-S1 is a 2-channel acoustic interface designed for production-line testing and QA/QC verification. Combining two 10W amplifier outputs and two mic/line analog inputs in a single unit, the AIO-S1 is an integrated, cost-effective, and reliable high-throughput audio test solution. One of the amplifier outputs includes a 0.1 ohm sense resistor to facilitate impedance measurements. Two additional line inputs are dedicated to voltage monitoring (VMON) and current monitoring (IMON) for impedance measurements.

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-S1 presents a standard USB audio sound card interface and is compatible with most audio test software including APx Flex, LabVIEW, Soundcheck, and ARTA.



2 IEPE microphone / line inputs with TEDS

Amplifier output

Locking universal power connector

Amplifier output 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 bandwidth72 kHz
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)
THDN (1x gain, A-weighted)< -95 dB (20 Hz – 20 kHz)
Frequency response±0.5 dB (20 Hz – 20 kHz)
Full-scale input voltage17.5 Vpk
Full-scale input current8.75 Apk

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 (4 AIOs)
22” (55.8 cm) x 22” (55.8 cm) x 12.6” (32 cm)
42.5 lbs (19.3 kg)

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