They are very good indeed. But of course, a true audiophile wouldn't use them ;)
By the way, while the principle behind class D amplifiers was already long known, it's the gallium nitride MOSFET technology used for switching that makes them really of sufficient quality.
By the way, while the principle behind class D amplifiers was already long known, it's the gallium nitride MOSFET technology used for switching that makes them really of sufficient quality.