![QA401 Audio Analyzer [Retired] spo-default Rub and Buzz](https://cdn.shopify.com/s/files/1/1631/5609/products/QA401.27.png?v=1523038555)
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Rub and Buzz
As with all of our products
including amp efficiency and output impedance
But the small size and the fact that our different accessories (mic pre
Portable Speakers
QA401 Audio Analyzer [Retired] spo-default Rub and Buzz16 Nov 2020: In late October a massive 82 hour fire destroyed AKM Semiconductor's ability to deliver parts, including the AK4490 DAC and AK5397 ADC used in the QA401. A replacement product (called the QA402) has been announced. 18 Jan 2021: A short run of the QA401 has been built, and we may do one more. But for now, QA401 can be purchased. Note that the new build requires SW release 1. 920 or later. If you need a replacement unit for a legacy
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