QuantAsylum QA403 24-Bit-Audio-Analyzer

Received the unit from Elektor recently in a small and well packed parcel which arrived quickly to the UK within a week.
The QA403 is a small well finished unit in a tough powder coated metal enclosure which possesses all of features needed for audio testing of amplifiers & pre-amps, etc, and only requires an easy to get free software download from GitHub.
Once set up it was easy to test the noise floor of the in-built generators (you need to select QA403 in the software and use page up/down to access these as there's no scroll) which is about -116dB or 0.00016% THD, which for an analyser costing well under $1000 is incredible. I normally use a 16bit PicoScope for this kind of measurement which is a superb device and ok to -92dB but the 24 bit digital converters really show here.
Overall there are lots of automated test and these will cover almost any audio test and are easy to set up and run with results being editable and printable after being run and displayed which is very useful. I think the difference between the PicoScope and the QuantAsylum is that the former in a true oscilloscope with very powerful software and response in to the MHz range, also working well at low frequencies with adjustable video bandwidth etc, whereas the QuantAsylum is a dedicated audio analyser designed to do automated audio tests up to 20KHz or so but it works very well at that. The software is simple and straightforward and those 24bit converters really show their performance easily outclassing anything else.
I'm looking forward to really using the analyser to test some serious hi-fi soon as I can't think of much that now cannot be tested, and I think it is an excellent product bringing hitherto unobtainable capabilities, perhaps the only product at anything like this price range that can. This unit really does do what it says on the tin and is worth every penny and a very worthy addition to my test bench.