Sound quality

We tried both units together as a matched pair, but also spent a fair bit of time trying each with various other electronics that we had on hand (all of which were of similar price or somewhat higher). It's fair to say that we started impressed and pretty much remained that way.

The CD player is particularly good for the cash. As we've remarked before, the basic building blocks that go to make up CD players have advanced in price/performance ratio to the point where some very well specified parts are available to designers of ostensibly very modest kit. Sure, power supplies and fancy output stages still cost real money, but it's possible to do very well in a budget design, and NAD's very own Bjorn Erik Edvardsen (Bee) has not missed a trick: this is a very capable player.

It is neutral and detailed, with a spacious yet precise soundstage that stays admirably stable through dynamic ebbs and flows. it also has plenty of rhythmic kick in its sound. Actually the 'neutral' bit needs just a little qualification.

In the bass there is a slightly hollow quality at times, a suggestion that control isn't absolute. At first we though this must be a function of the amp, but it stayed with the CD player when we switched amps and largely vanished when we used the C326 amp with other players. That apart, the C545's approach to tonality is very even handed and the midrange really is little short of exemplary.

The very highest treble is a shade constricted when heard alongside the best that one can buy for around £500, but in isolation it isn't bothersome. There's no obvious musical preference, though we were particularly impressed with the player's showing on classical chamber music – a difficult genre that requires crisp treble but also excellent detail.

In this case results were both believably solid and very melodious. The amplifier fully maintains NAD's reputation for making fearless belters and as we would hope, it drove our usual ATC SCM20 speakers with little trouble (this model needs a fair bit of power, but beyond that is not actually a very difficult load – its impedance is no worse than moderate) but it also had a mighty good go at driving the notoriously tricky Bowers and Wilkins 803S, a current hungry model that was never designed to partner budget amps and can often reduce them to the electronic equivalent of tears.

By contrast in this case, the C326 provides both brute force and subtlety, suggesting that with more likely matching speakers, it is in little danger of running aground. We feel that the amp is not quite as neutral as the CD player and its tonal palette has a slight preference for the bottom half of the spectrum.

We'd far rather have that than the reverse, though, especially when the bass is delivered with both panache and finesse. The very lowest tones of organ, piano and percussion are naturally a little less assured than one would expect from a dedicated power amp, say, and the precision with which the upper bass is handled also lags upmarket models by a small margin. But in its context the bass is really very fine and, as with the CD player, has a pleasing solidity to it.

Treble may be a shade recessed, but it too has considerable refinement, revealing clearly the differences between similar instruments in an ensemble, for instance, and making the most of delicate ambience cues.

As a duo, these two really get on like a house on fire. The whole is distinctly more than the sum of the parts, in a way we don't always find with 'matching' components. For the modest asking price, these two provide a remarkably musical, but also analytical basis for a simple, high-quality system.