Listen’s New AudioConnect Analyzer Audio Interfaces Specifically Designed for Acoustic Testing

December 29 2014, 08:00
Listen released two new audio interfaces designed to meet the majority of audio test and measurement needs, AudioConnect and AudioConnect 4x4. Both interfaces are specifically designed for audio and electroacoustic test and measurement.
 
Both units offer digital and analog audio in and out channels, USB control, and a power indicator. All other typical soundcard controls that are not used for audio test applications have been eliminated. The goal is easy operation and calibration with no room for error. The units are supplied fully calibrated. They are also compact, rugged, and rack mountable.

AudioConnect offers two channels in and two channels out (analog and digital S/PDIF) and a 44.1-kHz/48-kHz sampling rate. It is packed with additional features to simplify your audio test setup, including SCM microphone power with 0-dB/20-dB gain, a headphone amplifier and USB hub, which enables daisy-chaining of USB components and a logical place to keep the SoundCheck dongle.
 
Its sister analyzer interface, AudioConnect 4x4, is a high-precision audio interface offering four channels in and four channels out (analog and digital AES/EBU 24 bit and up to 192 kHz). This audio interface offers a high SNR and a wide frequency response, making it suitable for the most demanding measurement applications. The sampling rate can be set by the user at any value up to 200 kHz.

Full technical specifications for these two new Listen hardware interfaces for SoundCheck are listed here
 

Analog I/O 

AudioConnect 

AudioConnect 4x4 

Number 

2 inputs, 2 outputs 

4 inputs, 4 outputs 

Type 

Balanced or unbalanced 

Balanced or unbalanced 

Level 

10 VP In / 1.5 VP Out 

10.5 Vp In/10.8 Vp Out 

Input Impedance 

5.4 kΩ 

Balanced: 24 kΩ; Unbalanced: 12 kΩ 

Output Impedance 

≤5 Ω 

Balanced: 100 Ω; Unbalanced: 50 Ω 

Output Drive 

19.5 dBu full-scale output into 2-kΩ load 

600-Ω impedance; 0.2 μF capacitance 

A/D and D/A Type 

16 and 24 bit 

24-bit multi-level, delta-sigma 

Analog In Performance 

 

 

Frequency Response 

20 Hz to 20 kHz, ±0.25 dB 

20 Hz to 20 kHz, ±0.1 dB 

Dynamic Range 

110 dB 

117 dB, A-weighted 

Channel Crosstalk 

–110 dB, 1 kHz signal 

–120 dB maximum, 1 kHz signal, –1 dBFS 

THD/THD+N 

THD at 1 kHz: 0.001% typical 

–107 dB (0.00045%) at –1 DBFS –106 dB (0.00050%) at –6 DBFS 1 kHz signal, 22 Hz to 22 kHz BW 

Analog Out Performance 

 

 

Frequency Response 

20 Hz to 20 kHz, ± 0.25 dB 

20 Hz to 20 kHz, ±0.1 dB 

Dynamic Range 

114 dB 

117 dB, A-weighted 

Channel Crosstalk 

–110 dB, 1 kHz signal 

–120 dB max., 1 kHz signal, –1 dBFS 

THD/THD+N 

THD at 1 kHz: 0.001% typical 

THD+N: –107 dB (0.00045%) at –1 DBFS –106 dB (0.00050%) at –6 DBFS 1 kHz signal, 22 Hz to 22 kHz BW 

Digital I/O 

 

 

Number 

2 inputs, 2 outputs 

4 inputs, 4 outputs 

Type 

S/PDIF 

24 bit AES/EBU format 

Sample rates 

44.1 kHz / 48 kHz 

All standard rates and variable rates up to 192 kHz 

Connections 

 

 

Digital I/O ports 

BNC 

25-pin female D-sub connectors. Yamaha pinout 

Analog I/O ports 

0.25” TRS 

25-pin female D-sub connectors. Tascam pinout 

Additional Functionality 

 

 

Microphone inputs 

2, microdot connector, SCM/Electret bias 

N/A 

Microphone Gain 

Unity/20 dB 

N/A 

Headphone Power 

> 50 mW into 8 Ω 

N/A 

Headphone Output Impedance 

< 3 Ω 

N/A 

USB Hub 

1 internal and 1 external USB port 

N/A 


For more information, visit www.listeninc.com
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