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QA403 Audio Analyzer
QA480 1 kHz Oscillator + Notch
QA460 Transducer Driver
QA351 uV DC Voltmeter
QA451 Programmable 8/4 Ohm Load
QA490 In-Ear Monitor Tester
QA471 Low Noise Mic Pre-amp
QA40x Software Application
极速赛车官方开奖结果号码查询 Recent Blog Posts
November 15, 2022
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...
October 05, 2022
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
December 24, 2021
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
November 23, 2021
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)
June 03, 2021
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...
January 08, 2021
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
December 12, 2020
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
December 03, 2020
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 1分钟极速赛车开奖直播app下载
October 23, 2020
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
October 18, 2020
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
September 19, 2020
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
August 10, 2020
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...