Nearly all manufacturers do not advertise/exhibit their product measurements? Why?

kota1 - thanks for posting cable study paper link!

that “ paper “ captures most of important IC parameters for passive circuits. unfortunately, audio system is more complex than that, and has sources and receivers built of active circuits. active circuits can add “audible” ringing to the signal, if cable parameters push circuit phase margin below targeted value. EMI/RF noise also can be audible, because not all sensitive amplifiers have enough high frequency noise rejection, to withstand modern days RF noise in our living spaces. depending on modulation technique, RF noise can be heard as additional “unexplained" noise affecting SQ. phono-pre could be a good example of sensitive active circuit usage, and therefore it is very hard to find good match between cartridge, cable, and phono-pre, to achieve excellent SQ. 

Does that RF show up with an o-scope?
Or in IM components?
Or in a raised noise floor?

I don't care what the measurements say, I care what my system can do in my room with my ears.

Too much Roo Poop in your ears to hear a difference.

must me that the sound is too nuanced? I know a Nobel Prize is. 

Too much Roo Poop in your ears to hear a difference.

must me that the sound is too nuanced? I know a Nobel Prize is. 

Please try to stay on topic..,,. The topic is “manufacturers and measurements.”

It is not about marsupials, nor distribution of money made from dynamite sales.

or at least share with us what you’re drinking, in order to put the comments in context.

Dear @fleschler  :  " However, the query remains as to why don’t manufacturers supply their own test measurements and depend on reviewers? "

Normally manufacturer specs are not a manufacturer " fake ", normally all them made measuremets test from those specs came.

So, in reality no one audiophile/customer really needs those " measurements " to make his choices.

Specs are important to know if a cartridge can be handled by my phonolinepreamp gain or if the weigth/compliance cartridge specs could mate good with my tonearm.

Same when we are trying to mate speaker/amp where at least we need to know the speaker sensitivity along the amp rated power speaker nominal impedance and speaker crossover discrete frequencies.

What need we to know about any TT no matters its kind of drive? obviously its speed stability specs, there are other important TT specs around but the main one is that SS.

When we talk about phono stages main specs are: inver RIAA eq. FR deviation, noise level, gain level and if it's a high gain active or passive design.

When we need a SUT: FR bandwidth and gain are the main specs.

And we can go and go about. Almost all manufacturers give us their audio item specs that if we know to " read " it can tell us the quality level of the audio item design.

To have the charts of those specs do not helps me because you can make 3 times the same measurements with 3 cartridge samples or with 2 monoblocks amps or speakers or what audio item you imagine and you will find out that all the measurements are not exactly/accurated in between the same amp, speaker, cable, cartridge and the like.

So why to worry about? what we need is not measurements but SPECS.

Regards and enjoy the MUSIC NO DISTORTIONS,

R.