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

Doesn't correlate with sound quality at all and yes I use Class D.

Agree, much of the time. Since Class D is relatively new and the kinks are still getting worked out, I think there is some correlation to sound quality – but as you point out, not because of the topology, per se.

If someone said to you, "You can can have one free amplifier worth $1000 and we won't tell you which brand or topology it is," what would you choose to ensure the best possible sonic outcome? At $1000, I'd choose Class A/B.

Well, the main reason to buy a Lyngdorf amp is for Room Perfect, but that said, I look at amps like DACs. They have one purpose: to reproduce what is given to them accurately. Changing the character of your sound should be done at the preamp level. Enjoy!

@ntpc4 someone gets it

I tried Ralph's Atma Class D. It sounded pretty good. The bass was excellent, but the upper frequencies just seemed 'off'. (Which I put down to feedback). -And, I still own Atmasphere tubed amp and pre.

For me, it will be Class A/AB for the while...

Bob

I’ve always been a tube guy myself. However being in this business, you have to hear different technologies. In the beginning, Class D did not sound all that good as it was a new technology. They really have come a long way but like everything else, there are good and bad examples out there. I am a Class D fan (GaN FET) but I do not limit myself. If I like it, I’ll use it.