yes, i understand. the point is if you dump dirty power into anything other than a good power conditioner you are going to get dirty power out. you tested your product under perfect conditions.
Not quite. Bear with us as we elaborate.
We tested our product in isolation, meaning we test it by itself, to confirm what it does, in itself.
Any other test is meaningless to confirm the performance of the product itself, it confirms the performance of a complete setup, which may or may not have been assembled competently and hence is outside the control of the product manufacturer.
Under our testing (long before testing the iPower) we identified weaknesses in the test gear/setup (e.g. earthing of AP2), we took steps to eliminate these so-called 'instrument ghosts' (yes, they are really called that among the pro's) to ensure we measure the performance of the device being tested and not some unwanted garbage that is a result of ground loops etc. Naturally we use the same corrected test-setup for testing the iPower.
Further reading here: (hope this does not offend the mods bu C-A and H-F are good friends.
http://www.computeraudiophile.com/f30-abbingdon-music-research-ifi-audio-sponsored/measuring-ipower-much-ado-about-nothing-part-4-uploaded-and-complete-28982/
If one tests and gets a lot of mains frequency related noise in one's measurement, one knows there is an earth loop or missing earth or similar problem. Even if one lacks experience, the AP2 test-set manual tells one to try different grounding options in this case.
So if resolve this problem is not resolved ,and the results are published, all one did was prove is that one did not know how to operate test equipment and/or how to read manuals and the subsequent test results are meaningless.
We tested specifically audio band noise, as this is where many power supplies (SMPS or others) fall down and as this is what various others tested. We fully expect our results to be 100% replicable using a similar test setup and care to eliminate test-equipment related issues. For what it is worth, a leading USA publication asked to look into our setup and we sent the instructions and they seemed quite satisfied!
Incidentally we also have a RF Test Setup with a 1.5GHz Digital Spectrum Analyser and an Artificial Mains Network (aka LISN) according to CISPR 16-1-2 and other related stuff, so we can do our own EMC testing. The accountants threw a hissy fit when they saw the bill for that setup. RF test gear makes you appreciate how cheap high-end audio really is.
While we have not specifically published the results of these RF tests, the iPower does not only steer well clear of any legal emission limits but again is significantly better than common SMPS, both in terms of noise on the mains side and on the output. And surprisingly (or perhaps not), linear off-mains supplies have surprising amounts of noise themselves, even at high frequencies.