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

After my Audio Science Review review forum, it became apparent that nearly the only way one can determine the measurements of an audio product is wait for a review on line or in a publication.  Most equipment is never reviewed or is given a subjective analysis rather than a measurement oriented review.  One would think that manufacturers used tests and measurements to design and construct their products. 

Manufacturers routinely give the performance characteristics of their products as Specifications.  Those are not test measurements.

I searched the Revel speaker site for measurements of any of their speakers and could not find any.  Revels are universally lauded for their exceptional reviewed measurements.  Lack of published manufacturer measurements is true for nearly every speaker manufacturer I've searched for on line, perhaps several hundred.   Same is true for amps, pre-amps, DACs, transports, turntables, well you get the picture.  Do they have something to hide?   I doubt the good quality products have anything to hide but poor quality products do.  

ASR prides itself in providing "true" measurements that will aid in purchase decisions.   Why don't the manufacturers provide these measurements so that reviewers can test if they are truthful or not?

Then there are the cables and tweaks for which I suspect that there are inadequate tests available to measure sonically perceived differences but which objectivists believe don't exist or are "snake oil."  

Well, please chime in if you have some illuminating thoughts on the subject.   

I would have loved to see manufacturers measurements on my equipment and especially those that I rejected.  

fleschler
kota1
2,706 posts
 

@fleschler , re: specs for cables Mogami lists fairly extensive specs with each cable it sells:

https://mogamicable.com/category/products/W2319.php

Mogami Gold:

SPECIFICATIONS

Configuration mogami guitar cable w2319d
Part No. W2319
Conductor Details 12/0.18TA
Size(mm²) 0.305mm² (#23AWG)
Insulation Ov. Dia.(mm) 1.6Ø (0.063")
Material PE
Color Clear
Sub-Shield Ov. Dia.(mm) 1.8Ø (0.071")
Material Conductive PVC (Carbon PVC)
Color Black
Main-Shield Served-Shield Approx. 38/0.16TA
Jacket Ov. Dia.(mm) 5.0Ø (0.197")
Material PVC
Color Black
Roll Sizes 100m (328Ft)
Weight per 100m (328Ft) roll 3.5Kg



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ELECTRICAL & MECHANICAL CHARACTERISTICS

Part No. W2319
DC Resistance at 20°C Inner Conductor 0.064Ω/m(0.020W/Ft)
Shield Conductor 0.026Ω/m(0.0079Ω/Ft)
Capacitance at 1kHz, 20°C 155pF/m (47.3pF/Ft)
Inductance 0.3µH/m (0.092µH/Ft)
Electrostatic Noize* 0.13mV Max.
Electromagnetic Noise At 10kHz* 0.07mV Max.
Microphonics* 0.3mV Max
Voltage Breakdown Must withstand at DC 500V/15sec.
Insulation Resistance 100000 MΩ × m Min. at DC 500V , 20°C
Flex Life 11,000 cyles
Tensile Strength (26°C, 65%RH) 303 N
Emigration Non-emigrant to ABS resin
Applicable Temperature -20°C‾ +60°C(-4°F‾ +140°F)

 

djones51
4,947 posts
 

Canare shows extensive specs on cables as well. I only use pro cables,  they're built to withstand a lot of abuse and as long as you keep guage, length, connectors in mind shouldn't be any difference in most cases. 

fleschler OP
2,028 posts
 

Well those two cable manufacturers do publish their test measurements.   It's too bad that the Canare and Mogami tried in the past 10 years by friends (4X) said that were mediocre for playback, not bad just uninteresting. They purchased more expensive cable which they preferred the sound.  Too bad, another instance where test results don't translate into better sound for playback.  They sounded flat and uninteresting, not open sounding either.  However, for professional use in recording, they are probably ideal with a perfectly flat frequency response and interacts well with other pro gear.   Years ago I tried some pro cables (could have been Canare) and also found that dull and uninteresting.   Maybe cables designed for recording are not compatible with reproduction/listening back for enjoyment.   

kota1
2,706 posts
 

@fleschler , re: cables I am using Mogami XLR in a 9.2.7 home theater with predominantly active speakers. The runs to my surrounds and surround height speakers are more than 10 feet. It works very well and I think to make it noticeably better would cost $$$$. With an interconnect I want transparency, with a power cord I want dynamics.  

fleschler OP
2,028 posts
 

As I previously said, equipment must be matched to a system and in a room.   If it sounds best to you, that's fine.  ICs are the most common beta test that I have done in 25 years (about 90%, maybe 100 designs).  Fortunately, after all those trials, the manufacturer has had only three designs in 10 years.  Power cables and speaker cables appear to be easier to design with less than half a dozen each in the same period.  The ICs I use cost $750 a pair, about 15 times more than Mogami, so you're right about cost.  

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