I took a quick look. A-weighting (the great liar) has been applied. Take a close look at the second and third FFT. That is one way to make mains noise disappear from view and measurements. I call bullshit.
@atomicbob - ugh. I've been avoiding visiting ASR but I might have to do it again just to check. Is anyone doing credible measurements there that isn't Amir? There's other products on Audiophonics with the ASR stamp too.
@Cspirou - I looked at graphs on the link you provided. Didn't need to visit questionable site. Have a Khadas on the way and will put into the measurement queue. Maybe a side-by-side comparison with Matrix XSP which is also in the queue.
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