5% THD to .000 THD SOUND


I was searching the amplifiers available and noticed quite a big difference in THD specs from model to model. Example.. One of the best amplifiers Kondo Audio Note $150k Kagura has 5% THD and by reviewers definition sounds like an amazing amplifier. Now compare $ 30k  Devialet with the lowest 0.000% THD on the planet. Both at the opposite end of design yet both sound amazing.. according to reviewers, I havn t heard either. SN/R  133 by Devialet and a lot less by Kagura. I realize an amplifiers sound can t be based by Specs alone.  If the specifications are not that important to the sound, why list them? They must be a way of determining sound, quality, and system synergy of an amplifier? A whole lot of amplifiers purchased on the net haven t been heard before and I believe the decision to purchase is made by reviewers point of view, specifications and word of mouth of other owners and buyers pocket book. By looking at specs of Devialet and NOT knowing the prices of Kagura and Devialet I would of gone with the Devialet just based on specs alone for the impression of it being a  great sounding amplifier.  Ive read other discussions on forum and cant quite get a handle on why BOTH amplifiers sound great. I thought High THD was a bad thing..
derrickengineer
Hello bwaslo,
Your explanation makes a very compelling and logical case for the seemingly overstated importance /relevance of the THD specification. It certainly is consistent with the not infrequent observation of relatively poor measuring components that sound exceptionally well. Stereophile reviews are a good example. A reviewer says a component sounds terrific, yet subsequent test bench results are average or even poor. Conversely there are examples of excellent measuring components that sound bad. Again, this is why Einstein’s quote regarding what can and can’t be measured is timeless in its profundity.

It is fair to say however that some specifications and measurements are more relevant than others. On the other hand THD may be less meaningful and predictive than is generally belived. Good post bwaslo! An isolated measurement under test conditions may have little correlation with actual music signal performance quality .
Charles,
From the website of things that Einstein never said,

8. "Not everything that can be counted counts, and not everything that counts can be counted."

It’s a pleasant point to be made, but Einstein never said this. Quote Investigator points to a 1963 paper by sociologist William Bruce Cameron: "It would be nice if all of the data which sociologists require could be enumerated because then we could run them through IBM machines and draw charts as the economists do. However, not everything that can be counted counts, and not everything that counts can be counted."

One thing Einstein did say is, "Education is what's left after you forgot everything you learned in school."

cheers
I’ll give proper credit to Mr.William Bruce  Cameron. Different messenger, same impactful message.
Charles,
By the way, the quote you might possibly be looking for is,

"If you measure a certain audio parameter and it measures poorly and the device under test sounds bad you're probably measuring the wrong thing." - anonymous audiophile