Gallium Nitride (GaN) and is poised to uproot the high-end audio world. In fact
Yes as I posted here, these eGaN fets are what Technics are using in their new $30k class-d and with it are able to double the frequency of the switching noise. And therefore able to remove it with low order filters more effectively from the output of the amp, without coming close to the HF audio band with those low order filters effects (phase shifts) and left over switching noise.
https://forum.audiogon.com/posts/1413469
https://forum.audiogon.com/posts/1413463
Why We’ll Soon Be Living In A Class D World
By Skip Taylor | September 17, 2016 4:27 AM
"A high-definition eGaN FET-based system with higher PWM switching frequency"
Cheers George