I'm wondering how long companies like Mac, D'Agostino, Boulder, and all the tube companies are going to hold on to Class A or A/B when you can generate so much clean power from such a small, affordable, and efficient design from Class D. Maybe they like to have some coloring of their sound? Perhaps, but the masses are slowly starting to wake up to audio quality and are demanding more of it and Class D at this level of power and affordability is going to be very hard to beat in the future once the masses learn about it.