`They sound good at first, but after many hours of burn-in they begin to shine. Sound integrates, bass comes up, lo-mid-hi lobing of everything disappears and instruments sound more realistic. Really good on jazz, vocals and classical.
Mine did not settle in for at least 3 months if not more.
I expect the other SuperLux models would respond the same. They need long burn-in, and they respond well to upgraded ODAC's, cabling, and such.