Blog Entries

Characterizing Opamps

Characterizing Opamps

by site admin
Modern opamp specs are amazing. They come to us in a compact PDF form with outstanding vector color graphics, making it easy to know an enormous am...
Customizing Tractor

Customizing Tractor

by site admin
Tractor is our open-source platform for automating production testing. It's designed to let you build out a comprehensive test plan for your produc...
Building a 6:1 Mux for 5.1 Testing

Building a 6:1 Mux for 5.1 Testing

by site admin
When testing a 5.1 amplifier, it's desirable to perform the tests with all channels under load. The front-panel of the QA440 is shown below. It's a...
SneakPeek: The QA403

SneakPeek: The QA403

by site admin
Last year at this time, we introduced the QA402 as a successor to the QA401. The rapid switch was required by the AKM fire, which destroyed AKM's f...
Silicon Shortages (Updated September 2021)

Silicon Shortages (Updated September 2021)

by site admin
Update September 17 2021 The graph below is the mid-September update. Since July we've seen Digikey stock degrade further, by another 8% or so. How...
QA401/QA451 Review

QA401/QA451 Review

by site admin
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

by site admin
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

by site admin
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

by site admin
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

by site admin
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

by site admin
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

by site admin
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...