Purifi Class D: Junk?

I am sure that changing a part here and there could change a measurement. However, this us not the usual case. You can take 10 different brands of normal metal film resistors and they will all measure the same.....and all sound different (I have done this).......maybe a non inductive Vishay or Caddock could change a measurement....but most things cannot.....and this includes brands of solder.....that also....all sound different. Yes, there are certain measurements you can do with a component stand that will be measurable.....However, there are no agreements as to which measurements mean what sonically and which component stand sounds best with which component. In fact, some people prefer to "add certain natural resonances.....to enhance the sound" Fuses all sound different and you cannot measure all the sonic differences with a meter of any kind. The only meter that matters is your ears. I have never seen anyone state that good film caps measure differently (certainly, ceramic,Tantalum and Electrolytics should never be used in the signal path).......yet all types and brands of film caps sound different. Please, use your ears.

Here is a good one. I bypassed a fuse with a 12 gauge wire soldered across the fuse solder on its inside bottom (fuse holder was a board mount fuse jobbie). It made an impressive improvement over the stock fuse. However, the tabs that normally would hold the fuse up slightly in the air were still sitting there......and I figured they might be adding some resonance. So I broke off these 4 tabs and the sound was noticeably improved. Measure that!!!!! This game is not simple....it is infinite....enjoy the infinite.....it is all there is......and it is infinite love and joy.

Here is another good one.  Years ago it was said the Nichrome thin film surface mount resistors were the bomb.  So, I bought 4 different one eight watt 75 ohm resistors from Mouser and tried them on the output of a low jitter clock.  These things are so tiny you can hardly see them.....and they all look the same except for color.  But all four brands sounded different.....one being way bad and one being way good.  I still use the way good one today.....but now I use the quarter watt versions and parallel them for best sound.  Did i say this game in infinite?  Cannot say it enough.

I am sure that changing a part here and there could change a measurement. However, this us not the usual case.

What is it with people feeling its okay to pontificate and lecture about things they clearly haven't the foggiest about? To an audience chock full of people who do?  

Ralph has more experience in his little finger but even I have enough to know its darn near the OPPOSITE of what this ricevs guy is saying. First swap I ever did was a diode, just a dumb little $8 hexfred, and the improvement was massive! Changed caps- huge. Fuse- ditto. On and on.  

Actually did these things. Actually heard these differences. Just a suggestion ricevs, but I really do think what you should do for at least a while, every time you're all set to start blathering about that which you have no actual experience or knowledge of, type the words, "Of course I have no clue if this is right or not because I haven't done anything even close to this before but...." and then type away. 

Deal?

ricevs
Almost all tube manufacturers....they pick caps, etc. by ear....and they don't measure any different.

atmasphere This statement is false- they do indeed measure differently (whether some companies bother to measure the differences is a different matter). We use custom made resistors as well (made by Caddock); they sound better but they also measure better.

I couldn't agree more (wow that's one for the books)
Any manufacturer/designer or modder worth his salt, will use all the EE laws at hand to design, then build/measure/bench-test and listen. And if they don't like it, they change things using all the EE laws/measure/bench-test again and listen once again till they get it right. Any fool that say otherwise is a hoax and a snake oiler.

Cheers George  

Miller,
I do not understand what you are saying to me. I am the one saying everything makes a difference and I have been doing listening tests for over 40 years. I do know what I am saying because I EXPERIENCED it, just like you did. Maybe you are confusing me with someone else. I am confused by your comments above......maybe you are confused. Check out my website...you will see how crazy I am..... he he.

BTW, what you quoted from me is true. I am not talking about changing a transistor or tube or making a circuit change. I am talking about changing a brand of solder, wire, resistor, cap, etc. to a different brand and measuring a difference. For the most part, you cannot measure the difference between different brands of solder/parts.....that is the truth. measurement wise.

Can you illuminate me on what types of differences, among equally rated and types of fuses you have encountered? How precise did the DVM have to be for you to measure it, and what qualities do you look for?

The voltage drop across the fuse varies. The better sounding fuses correspond with the least voltage drop ('better sounding' doesn't always correlate to 'boutique', just to be clear). I use a Fluke DVM that's 3 1/2 digits. Like I said, its not rocket science. I prefer to use Littlefuse or Bussman.