i'm a longtime HK fan--their amps have almost always sounded better to me than their peers, perhaps because of their high current designs and minimal reliance on negative feedback. their 70s stuff (730/930 receivers, citation amps) is classic, and after sidney harman re-acquired the company from the japanese in 1985, they resumed making very sounding gear (the late 80s pm665 integrated is especially noteworthy). as others have stated, their quality started declining in the 90s, although much of it still sounds good by mass-market standards. the recent hk 990 seems to be their attempt to re-assert themselves as serious player, and like marty says, it's an exceptional unit.
