The QA401 is our second generation of audio analyzer--the follow-on product to the QA400.
The QA401 can perform a wide range of basic audio measurements, making it a cost-effective addition to your bench. Unlike a sound card, the QA401 offers isolated and differential IO with input handling up to +26 dBV. And unlike a sound card, accuracy is absolute and achieved through 0.1% thin film resistors instead of a tedious measurement and calibration process.
The product brief goes into more details on the specifications and graphs of QA401's performance: The QA401 has the margin to measure measure 99% of consumer and pro products out there today.
The QA401 can operate standalone, or in concert with the QA450 Programmable Load as shown in the video below. Combined, these two products can automate much of the testing your pre-amp, audio effect or high-power amplifier might need during production.
The QA401 can be automated using Microsoft's DotNet tools, making it a snap to customize measurements or integrate with other test equipment. If you aren't interested in writing code to automate the measurements, then Tractor can likely provide just about all the measurement automation you might need without the need to write any code. See the post here for more information. With Tractor, you can be making basic audio measurements, including amp efficiency and output impedance, and storing the results of your product by a serial number to a cloud database in minutes. And then query that database to analyze yields are margin to spec.
Finally, if you want to use the QA401 with your favorite ASIO-enabled audio analysis software such as ARTA or MATLAB, there's a 3rd party ASIO driver for the QA401 available on Github.
As with all of our products, the QA401 generally ships within 24 hours of ordering (and often same day). We ship all over the world. And all of our products come with a 15-day no-questions-asked return polity.