I'm not an electrician, let alone an Audio engineer, so much of the test results whoosh over my head. But I've learnt enough over the years to claw my way around and spot the good from the bad.
My issue is things like the below that someone posted earlier in this thread. Do I read that the Hypex closely matches the Purifi and my ears won't tell the difference? Or do I read that the non linear end brings audible differences that are worth paying the extra for?
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Understanding the test results is one thing, placing that into a practical, real world usage scenario is quite another, for me.
I'd love to hear a Purifi next to, say, a Nc502, just to confirm that I can, or can't, discern enough difference to justify doubling the cost. But as that's not likely to happen I'm erring towards the better safe than sorry Purifi.