Debate: Class D amps need 48 hours of warmup

@erik_squires 

You were called out for saying that your "engineering knowledge and actual listening experience have not lined up".

That sounds like a fair statement. You didn't claim to be an engineer, and besides you don’t have to be one to have engineering knowledge, just like you don’t have to be an attorney to have legal knowledge. Just try and get sued!

Anyway, you were nice enough to dignify that pompous nonsense with a serious answer. I wouldn’t have. Maybe I’m not nice.

@devinplombier 

You were called out for saying that your "engineering knowledge and actual listening experience have not lined up".

Sorry, my friend, I understood your meaning and I meant to reply in a humorous way about how I would troll civil engineers.   I should have added laugh emotes. 

@mitch2  Understood. Different professions carry different mindsets and different torches. Let them call things whatever they want. In this regard, it bears no consequence and is none of my business. I just hope they don’t spin out Venusian stuff like this — it’s annoying and nearly nonsensical.

On the other hand, the way you’ve rephrased your opinions is articulate, professional, and to the point — like an engineer handling things the way they should be.

@ghdprentice  Sanitation Engineers.

Indeed, this profession covers your / our 'ass.'

So apparently my post was too much for Audiogon, but I don't care.  You can't argue with facts: asphalt is a liquid.   

At the office, I have a McIntosh mxa80 driving Sonus Faber Sonetto II’s.    At home, I have a MHT300 driving Martin Logan Renaissance 15a’s as well as a MA12000 driving Sonus Faber Sonetto III G1’s and a JL sub. I listen to music on all of these, but it’s streaming at the office and on the theater systems and CDs or vinyl in the listening room. 

Both the MXA80 and the MHT300 are Class D.  The MA12000 is a hybrid of Class A and Class D.  

All that to say I can’t hear a difference.  Ever. The MA12000 has its own warm up schedule for the tubes, but that takes just a few seconds... which is what I would expect of electronic components.  Frankly, I cannot imagine a piece of kit which would require hours or days of warmup.  But I’m a lawyer, not an electrical engineer. 

Serious and not intended to be inflammatory question:  do the electronics on NASA missions require hours or days of warmup for optimum performance?  Does anyone know? 

EDITED: I've just read the whole thread to discover that some engineers already posted and there's such a thing as Thermal Stability.  Hmm. I wonder how or if that impacts performance or if it's measurable.  Anyway, thanks for dropping that knowledge!