What Would Be the Reasoning Behind Leaving Class D Amps On?

I should clarify.  My amps are always on.  I implied they go into stand-by mode but that is not true for the amps.  It is true for my DAC and Preamp if / when I power down using the front switch.  The DAC never gets powered down and the Preamp when I'm not listening.

OP:  I've had exactly the same experience.  I have IcePower amps and they sound really scratchy for about 48 hours then just open up. I only noticed this because I went away for a week and decided to unplug the stereo.  When I came back I kept looking for an explanation and then magically the sound just really transformed on day three.  Other A'goners have had very similar experiences.  This may very well explain why some listen to Class D and decide it's not ready for prime time.

On the other hand, my Luxman 507ux is good in 5 minutes.

I have ZERO idea why. :-)

@erik_squires ,  THANK YOU! E.   I know you have some technical knowledge and background.  How wonderful it is to hear someone like you say, Yep, this is my experience and I'm not sure exactly why.  

Certainly the notion of caps being charged up and everything staying warmed up makes sense. But many of us have found the Class D "warm up period" is not ideal unless it's really given some time--not just 30 mins. 

I want that Luxman, Erik.  I'm lusting after their Class A stuff now. 

I have a pair of Wyred 4 Sound SX1000 (no R). Two day to sound good. A lot of people said the "R" model was a lot better. The fact of the matter was they have to be driven and on at least 48 hours. Mine actually "Boomed" and hated longer cables. I added some FAT speaker cables and a FAT power cable. It was like night and day between the first 2 hours vs a week later with cables. I actually kept the amps.. Powerful too, man alive!! Oh they like a good power supply to.

I added Triplite 2400 to maintain 120vac, too that was an eyeopener when I drove 100-300hz bass columns to over 110 db, with no audible distortion.. Without they got hotter and did distort at 10 minutes or so. After the maintainers.. 15 degrees cooler with the same ambient temperature, sound wonderful. 

I moved to 12Ks they will pound the poop out of your ears. Best bang for the buck on the planet.. I have 4 LOL NU12000s. I can't break one!

Where I live class A stopped when I hit 55. :-) 115 degrees is not uncommon where I live. Class Ds are king. Preamp are usually valves, here. I need a warehouse!!!

"The Church of Sound" nonprofit. :-)

 

it’s been said multiple times on the forums that it’s best to leave solid state / class d amps on all the time as it sounds better. turn off / unplug solid state equipment if going out of town or bad weather is coming.

tube equipment gets turned off when not being used.

Yes, Riley this has been said many times. Also, I think we all know the general idea that some stuff likes to be warmed up before use. I was, however, looking for more of an explanation as to what is going on in a Class D amp, if anything, that increases the need for more idle time.

For example, I think lots of us will agree that a tube amp warms up enough after say some range--30 minutes to 2 hours--at which point it’s warm and sound performance doesn’t improve anymore. But, with Class D, it seems to many of us that 30 mins to 2 hours might not even do it. So the question is why?

Many folks seem to believe (and I think that includes me) that Class D may need more warm up than say a Class A/B amp. Why would that be? That’s what I’m asking.

I wasn’t looking for the garden variety basis--hey warm up your car, snowblower, etc. and it works better. I wanted to know what is it, if anything about Class D, that seems to give better performance if the unit is nearly always on or on for hours upon hours.

Is there something specific in the topology of this type of amp that lends itself to far more warmup time or always on status?  It's a fascinating technology and I was looking to learn more about that.