Has anyone switched from Class AB/A to Class D? Was it better? Was it worse?

@dman777 I ordered them based on a class A rating in Stereophile and the price for the pair was in my budget. Also, they each have a tube. They are quiet, neutral, dynamic, clear and very accurate. I like how they sound. They run slightly warm.

I'm very happy with them. 

My system is very simple.  My source is a McIntosh CD/SACD player that also has a preamp section. XLR cables to the M1200s then speaker cables to B&W 803 D3, and SE cables to the JLAudio subs. In my treated room, with careful setup, I am very happy with the sound.

You may dial 500mW output @ 1kHz sine on any D class and A class amp and compare waveforms to understand D class problems better!

@westcoastaudiophile Actually there are a few class D amps that have a better first Watt than a good number of class A amps. One thing about class D is for the most part (as long as they have an analog output filter) they are immune to crossover distortion. So there can be a complete lack of higher ordered harmonics at very low power levels.

That looks good on paper and sounds good too.

Put another way if you want to show what might be wrong about a class D amp compared to a class A, this particular metric isn't it.

In 2025, Class D is the best way to go. 

I am two weeks in with a Buckeye 8x500 ncore hypex class D and I absolutely love everything about it. It runs cool even after hours of use, if you need to move it you could carry it under one arm, the amount of power is a gamechanger for me because I moved up significantly. My system sounds significantly better to me, and that is all that matters. I also appreciate not paying thousands for a pretty case, I get if you are going to display it in a listening room but for a theater application it is perfect.  The weight and the heat might not matter to most but I appreciate never worrying about the amp running hot. 

@atmasphere "Actually there are a few class D amps that have a better first Watt than a good number of class A amps.” - list of “few” and “good” ones will be helpful! 

Analog output filter question: how output filter is designed, order, phase v frequency., loading considerations (reactive speaker x-over + spkr-dr complex loading), R/L/C components tolerance, frequency dependency, aging / magnetic core inductors nonlinearity?