You Can DIY! Building a Null Tester Device

Now, what's a Null Tester? The Null Tester sends the same audio signal through two paths, then it electronically subtracts one signal from the other to obtain the difference. For years, many audiophiles and even some audio professionals have believed that signal wires can sound different. Obsessed with settling this dilemma, Winer designed a Null Tester device that compares any two signal wires and reveals their difference to a level below -110 dB. This article was originally published in audioXpress, June 2019.

DACS Audio is a company with over 25 years of field experience in Audio Installation, Studio Design, and Acoustic Treatment. In addition, DACS design and build a range of very highly regarded pro-Audio equipment, from microphone preamps and analogue processors, to monitor controllers. The company’s Test Lab is a portable trouble-shooting solution for all pro audio engineers that addresses all the problems that could be encountered, and is a must-have tool in live sound, installation, and studios.

Audio Precision announced the release of their newest driver for National Instrument’s LabVIEW software, which enables easy access to APx515 as a data acquisition platform. Additionally, the driver enables control of the APx515 completely independent of the APx500 control software.

Audio Precision announced the transition of company ownership from majority shareholder Bruce Hofer to AP’s leadership team. Mr. Hofer will continue to apply his expertise as principal hardware engineer while maintaining his role as Chairman of AP’s Board. Dave Schmoldt, AP President, will assume the responsibilities of Chief Executive Officer.