Could Class D really be that good?

People all over the world have changed those op amps and get different sound.....You, however claim that in a low gain circuit that all op amps have no sound. You are again a minority of one here.....thousands of audiophiles and manufacturers would disagree.

Not to put too fine a point on it, but when you can change an opamp (if its modern, hi performance) and hear a change (other than noise floor), one of two things is happening: 1) confirmation bias, or 2) the circuit has a design flaw.

Opamps have seen a lot of evolution over the last 75 years; guitar stomp pedals and synthesizers from long ago won't sound right if you install newer hi performance ICs instead of the original types. This is because older opamps indeed have a 'sound'. Modern ones do too if you don't use them correctly.

Put another way, the statement in the quote above is false; I never said that 'all opamps have no sound'. Clearly you don't read my posts or you would know that.

Anyone can open a class D amp and change how it sounds! Quite often their changes result in greater noise.

From your posts it appears to me as if you think you know more than other designers. So its curious that you haven't designed a module of your own long ago!

Wow, you just stated that all modern op amps are perfect. Yes, you did not state that all opamps made since the beginning of time were perfect (yes, I did not quote you correctly). What you stated before was just what you said: "all modern opamps".....you probably mean after 1980?....I quess that is when you stopped listening. All "modern" op amps have a sound and it is not confimation bias or a bad design flaw. This is where thousands of people (including world class designers) disagree with you. They know that certain brands of op amp sound differently (and most believe discrete op amps are the most transparent). But you have to listen to know.....something you do not do (at least with op amps).

The changes I do to class D amps lower the perceived noise. You hear farther into the recording.....more decay, more ambience, better imaging, more correct harmonic structure, more transparent and real......this is REAL noise reduction.....not some number on a graph. I do no know more about basic design than most designers, however I have more practical knowledge of implementaion and parts and how they affect the sound than most designers. I have been doing listening tests since the mid 70s....and was the first person (back in the late 70s), that I know of, that did straight wire bypass tests on wire....yes, no wire was perfect....

The companies that usually make the best sound do both....they design and they tweak like crazy. That is why they keep updating their stuff.....like the guy at AGD. Check out this page on Burson Audio. Go to the bottom of the page and see all the pics of customers products that were upgraded using their op amps.....you can keep loading more and more and more of them. These people have circuits that are flawed and they have expectation bias?.....come on......This is just the tip of the iceberg worldwide. At the top of the page are Utube reviews of the op amps. You can keep making stuff up and believing it and telling the world about it.......but it is not truth unless it passes the listenng tests. The people who have listened do not agree with you. Burson is now in their 7th generation of discrete op amp....they never stop tweaking....for they know there is no perfection. it is a goal. When you get to the top of the mountain......you look for higher mountains to climb......same with our soul. Love is infinite......the more you eat....the more hungry you become. It is the ULTIMATE ADDICTION.....bringing the highest joy......for everyone.

Wow, you just stated that all modern op amps are perfect.

Uh, no, I didn't. This sort of comment on your part is known as a Strawman; its a logical fallacy and false by definition.

In an effort to get things back to a "friendlier" tone...does anyone have any experience with the hybrid GaN FeT amps from "Response Audio"? One amp uses a 12au7 tube input stage while another amp other uses a DHT 300B tube input stage. They look quite interesting!

Wow, that is the best you can do.  You just stated above that any modern op amp has no sound (will not change the sound).  No sound is most peoples definition of "perfect"...or perfectly transparent......Again.....the people who listen do not agree.  Now what little thing that I just wrote will be your next victum of you ego defense mechanism.  Give it a rest....please.  If you keep saying untruth.....then I will have to counter with truth.  Please, all there is is love.  Please do more listening and post some listening test truths.  This will be most helpful.