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

Dear @fleschler  : " specs and measurements of cables and tweaks which are rare among high end products. "

Yes, you are rigth because with cables there is almost no single spec. LFD cables has a very high tag price over 18K and a gentleman asked directly to LFD for some specific cable specs and the manufacturer posted: " the proff is in the lestening ", obviously that LFD has no single spec on it's cables or those specs are so wrong that they just does not disclose it.

On the tweacks exist a lot of " sneak oil " items as the fancy capacitors and several other audio items where the manufacturers always say " you can have an improvement/enhance " when there is nothing that can make a real enhance/improvement to the original sound signal, every additional step where the ignal must pass through the best that can do it is to " degrade " the signal but with no true improvement. Could sound different but not better.

Anyway, I get your point,

R.

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.