Blog Entries

QA401/QA451 Review

QA401/QA451 Review

The December 2020 of audioXpress features a very detailed and thorough review of the QA401 and QA451. Reviewer and acoustic engineer David Logvin c...
Release 1.920: Open Loop Testing

Release 1.920: Open Loop Testing

Release 1.920 adds open loop testing. Open loop testing is useful when you are testing devices that cannot accept a stimulus from the audio analyze...
Sneak Peek: The QA402

Sneak Peek: The QA402

Post by Matt In late October, a massive 82 hour fire destroyed AKM's ability to deliver their flagship ADC and DAC products to customers, and this ...
Audio over IP

Audio over IP

There are several ways to move many channels of audio over a hundred meters. Most familiar to any that have worked in live sound is the humble audi...
Using the QA451 with External Loads

Using the QA451 with External Loads

Post by Matt One drawback of the QA450 was the fact that when the loads were disconnected, the output was muted. That changed on the QA451, and the...
Preview: QA440 Multimode Relay

Preview: QA440 Multimode Relay

The QA440 Multimode Relay provides 5-general purpose DPDT relays, accessible through two front-panel DB25 connectors wired in a Tascam DB25 audio p...
Introducing the QA490

Introducing the QA490

This week we begin shipping the QA490, which is a companion product for the QA401. The QA490 is for those that need to compare In-ear Monitors (IEM...
Introducing The QA480

Introducing The QA480

Post by Matt, July 2020 The QA480 will be a limited-run (~25 units) product for those doing hard-core R&D testing on advanced products that are...
Introducing the QA451

Introducing the QA451

This week we begin shipping the QA451. The QA451 replaces the QA450 programmable load. When combined with the QA401, the QA450 and QA451 products m...
Automated Testing of In-Ear Monitors

Automated Testing of In-Ear Monitors

The next few months will reveal another round of accessory products for the QA401. Next up is a tester for In Ear Monitors (IEMs) called the QA490....
Measuring Input Impedance

Measuring Input Impedance

For some circuits, it's easy to determine the input impedance. For example, take a look at the simplified input stage of the QA460 Transducer drive...
Mic Testing with the QA401

Mic Testing with the QA401

Last week a post on the forum showed how to make an automated test for microphones that runs in Tractor. Recall Tractor is the standalone program t...