Two quick things
@amirm
when you get something sent from the manufacturer, don't you run the risk of the product being cherry picked for performance? If so, what kind of variance could you expect from the same product picked from their stock at random (what are typical variances?)
is there any concern with the brick PSUs on these products, regarding safety - is there any way to incorporate safety into the tests or is this completely outside the scope of ASR?
In my experience, that is very unlikely.
We have tested hundreds of photo products, mostly lenses and camera bodies, and there was nothing that was specially built or selected. Quite the opposite, which is why in certain cases we even requested or obtained a second test object because the test result was too bad for us.
The effort would be extremely high and what would it achieve?
We have many users here who do or check their own tests. If the test result is too good, it would immediately attract some attention.
If such fraud is discovered, it would be a major blow to the manufacturer's image and many customers would no longer trust the products, and perhaps products from this company would no longer be tested in the future.
The products are not tested here for audibility, but for measurements.
What should be achieved with today's products, which are already at the limits of feasibility? 1-2% SINAD or THD?
And now the most important question: if you can do that, why not implement it in series production? The components for this cost just a few cents.
Or have you noticed a product here that you suspect has been manipulated?
A lot has already been said about power supplies and there is over 20 years of experience with power supplies for workstations and gaming notebooks and other devices in this performance class; these are not new products.
In any case, these power supplies are much cooler when in use; I know of products that you could hardly touch when in use. And we are talking about power supplies that ran at least 5-7 days a week for 8-10 hours and that for 7-10 years.
The test setup (laboratory) for switching power supplies would be too expensive and too time-consuming (extraction, extinguishing system, test equipment, etc.).
