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

My experience with Class D amps demonstrated to me that the quality of the sound was completely based upon which amp I had used.  One particular amp was nice, but it grated on me with extended listening time.  It was just too bright on the upper frequencies with a harshness.  I suspect it was the generic Class modules which were used in the amp; it was not a very expensive amp, and I'd say it was a perfect starter piece for kids in college who want a lot of output, very light weight and easy to move around and as I noted, affordable.   I was comparing it against my A/AB amp at the time too which was my baseline. 

I got a great deal on a pair of not very used Anthem Statement M1 Class D mono blocks, these are very expensive amps, but the price was great from the original owner who had a bad case of habitual upgrading syndrome.  He just had to have the super expensive $30K class A monobloc amps, so he let me have the M1's at less than half cost.   When I installed these amps (with dedicated 240V 15 amp each with direct runs to my service entrance), I was blown out of the park with what I heard vs. my A/AB fancy amp.  I knew within 2 minutes of listening to some very familiar vinyl these were game changers.  By the end of the weekend, I moved my A/AB amp out of the rack and put into a home theater application.

The Anthem M1's are very sophisticated design amps using internal liquid cooling heat pipes for the output devices and they use a proprietary feedback circuit which is makes them so amazingly smooth in the upper ranges vs. other Class D's I have heard.  I also experimented with them on 120V input vs. 240V input and it's still very good, but the dynamics on 240V make it definitely worthy of using.  Plus, they jump up to around 2300 watts output per amp for amazing headroom.

I will never sell these amps!  It doesn't get much better than this as it's like being in a live venue.

Interested in the 240 to 120V input are you using converters and or inverters @slimpikins5 

I have been using a Schiit Magni 3 (Class D) for years, and only recently invested in an Asgard 3 (Class A) and found that the Asgard has greater clarity and soundstage, but less bottom end.  But there are too many variables to consider to call it a simple difference between Class A and Class D.  But that was my recent experience. 

Heck no. I stick with what has worked my entire life. Class A, and Class A/B. I don’t need to experiment with some new Class simply because it’s new. Some of are satisfied with tube amps, or Class A or A/B. Done are we. 

My main listening setup uses a Rogue Sphinx Class D, mostly because I prefer Magnepans and need the juice, but also because I think the differences in quality amps are getting to be vanishingly small. Now, I also keep two casual listening systems that are Class A driving more efficient speakers. And here’s the thing: my diy First Watt M2 from diyAudio Store comes with five different input stages that are swappable and guess what? They sound different. So different implementation on the input stage, different sound from the same power stage. Go with your ears and don’t look back.