All Class D amps I have heard are the opposite of irritating. Go listen and see which ones you find irritating or not. I've heard Bel Canto and Rowland mostly.
Atmasphere has cited certain Pass amps and others I recall that are not prone to irritating harmonics as well. He would know best probably.
Atmasphere has cited certain Pass amps and others I recall that are not prone to irritating harmonics as well. He would know best probably.