Summary: By any standard, Naim’s combination of NAC 552 preamp
and NAP 500 power amp is expensive. Its sound quality is essentially neutral and
well-behaved, if perhaps unexceptional by high-end standards. But in the rather more
important task of conveying the vital messages behind the sound -- the musical information
and subtleties -- the NAC 552 and NAP 500 have proved more than a match for any of the
competition I’ve heard.