Debate: Class D amps need 48 hours of warmup

Of all my audio components the Class D AGD Audion Mk3 monoblocs require very little time to "warm up," Ten minutes is all I have ever required, and even that seems like an unnecessary ritual. The tube pre feeding then requires two hours to start grooving. The DAC and CD transport also benefit from a two hour warmup. Everything but the tube pre is left on all the time except when I will be gone from the house for days or also during thunderstorms.

I will say that the Audions did require about 50 hours of play to "break in" fresh out of the box, and that of all the power amps I have owned they reveal more tellingly what is going on with components upstream of them.

48 hours to get an amp to settle down and sound its best??  Chains are being yanked here... 

I did not think it was necessary but i would believe it

I’m running a NAD M23 Purifi Eigentakt Class D amp (200Wx2 into 8 ohms). NAD makes no mention of warm-up requirement or benefit FWIW..

I’ve read it performs best with a few minutes of warm-up although I can’t say that has been my experience. If I truly scrutinize the sound on familiar favorites, I’d say it might sound a bit thin for 5 minutes. But, that may also be what I’m expecting to hear based on conversations like this. Confirmation bias? Perhaps.

Quite honestly, I don’t see why a Class D amp would take long to warm up. It doesn’t have a giant toroid transformer. High quality capacitors and circuitry tend to hold their charge. Class A/B would be far more likely to need a warm-up in my opinion as they are designed to run HOT, compared to Class D which is by design, COOL.

As with all amps containing large capacitors, they can, over extended periods, lose their retained energy. In those cases, some extra time may be needed to recharge the caps. Otherwise, Class D should require less warm-up by virtue of it’s inherent cool-running architecture.

Quite honestly, I don’t see why a Class D amp would take long to warm up

Me neither, honestly.  It's just kind of a curiosity that myself and a few others have noticed it, specifically related to ICEpower amps.   Not going to try to convince others, just asking for actual vs. theoretical experiences. :)