Blog Entries

QA401 Release 1.70

by site admin November 05, 2018

Release 1.70 should be out this week and adds in a test plugin (Test Plugins-> Speaker Impedance) that makes it easy to measure the impedance of...

Tractor: First Look

by site admin September 21, 2018

Tractor is a framework for driving automated testing. The first focus is on amplifier testing using both the QA401 Audio Analyzer and the QA450 Pr...

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QA450 Programmable 8/4 Ohm Load

by site admin August 18, 2018

If you are designing and shipping high-powered amps and looking for an economical testing solution, we are putting the pieces in place to deliver what you need. Combined with our QA401 audio analyzer, the QA401 and QA450 working together will facilitate inexpensive, rapid testing of a range of amp power levels and topologies.

QA350 gets True RMS

by site admin July 31, 2018

The QA350 thus far has been a high-resolution DC volt meter, with a bandwidth of 1.1 Hz (slow sampling) or 441 Hz (fast sampling). Release 1.70 cha...

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A CMOS Pre-Amp for Hi-Z sources

by site admin May 03, 2018

A few posts back we took a look at the challenges of measuring high-Z sources with audio analyzers than have a bi-polar based front-end. The big tr...

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User Weighting and RIAA

by site admin April 12, 2018

A new feature in release 1.6 allows you to specify an arbitrary user weighting to the displayed data. This came as a request from those that are us...

Input Current Noise Density

by site admin April 09, 2018

One of the new features in the QA401 1.6 release is the ability to display noise density. A user was curious why the noise density calculations cou...