From my limited experience.I DO NOT like the sound of any of the classe amps including the monos.I I am not in love with the krell ,levinsin ot pass sound.For my self to power either the German Physics Loreleys in a very large room or the JM utopias also in a large room my choice was the Gryphon signature Antileon and my all time favourites if you can find them the YBA Passion 1000 monos,fantastic amplifiers.