SET the best?

Excuse the misuse of the word chip. Guess module is accurate.

And I am not saying that GaN technology is necessarily the best Class D.

Only that it currently seems to be a method that is quite popular.

My comment about Alberto’s module being specifically designed for Audio comes from the early review, believe it was Enjoy the Music. It pointed out that “all” other current GaN based amps use existing modules with chips that are currently used in non Audio devises like power chargers. Alberto’s design was focused on the use in his amps. This is my understanding. 

It pointed out that “all” other current GaN based amps use existing modules with chips that are currently used in non Audio devises like power chargers.

@mglik If he's getting semiconductor devices made for him I can see that happening. Usually you have to buy quite a lot of such devices to get any semiconductor manufacturer to pay attention to your order! But he might have an in with one of his former employers. But FWIW the chips used in switch mode power supplies have a lot in common with the requirements you face in building a class D amplifier.

@mglik  @atmasphere  There are so few threads focused on SET amps....Is it too much to ask that the AGD and GAN and Class D discussions be moved to their own thread or one of many already in existence?

I realize this is a 'resurrected' thread, but I for one am glad @mozartfan  did so.

Thanks. - David.

For me looks very weird that someone who was SET fan suddenly became digital amplifier fan. I can't say that SET are better or worth than digital amplifiers. But they are so different. These amplifiers topologies work best for completely different music, completely different speakers and completely different people.

It is like after be sport car fan become big SUV cars fan. 

As ASIC chip designer I can add. For any chip production you need to produce millions of chips of this particular model. Otherwise you will lose a lot of money.
For example, companies like Chord who made FPGA based DACs use FPGA for their custom DSP algorithms. Thay do it not because FPGA is better than ASIC. It is opposite in ASIC is possible to get in many times higher performance.
But they do it because ASIC production need to produce millions ASIC chip.
Therefore nobody does produce a special chip for audio!