J'ai trouvé ma réponse : il existe bien plusieurs versions.
Un conseil : méfiez vous de la couleur noire et regardez impérativement la version de votre modèle inscrite sur la boite en carton !!!
The UK's What Hi-Fi? has given our new C352 a warm welcome. Here are some excerpts from a comparative review that likens the C352 to the Rocky storyline:
The uncomplicated styling is true to form, though for the first time theres a choice in finishes the gunmetal grey weve come to associate with NAD and the new titanium finish you see here. There are a few question marks over the external build quality the speaker terminal in particular are stiff and awkward but a lot of effort has gone into the internal technology.
Beneath the exterior beats 80W output per channel aided by NADs PowerDrive? circuit topology design to sense speaker impedance and regulate power so that the RMS power into 8 ohms and 4 ohms is constant. Another NAD proprietary feature thats included is Soft Clipping, a selectable function that gently transforms the music waveform as the point of clipping (or distortion) approaches, giving a clearer quality of reproduction and as well as protecting your loudspeakers.
Connection-wise there are seven line inputs including two tape in/outputs which carry short signal paths from input to output. And there are two preamp outputs, so the unit can be used as a preamp in conjunction with a larger power amp. Theres also a set of preouts to allow biamping with suitable speakers.
Of the changes made the most important are improvements to the DC servo circuit, which succeed in tightening up the bass response. We criticized the C352CTs predecessor for its ponderous presentation and clumsy low frequencies, but there are no such complaints following these improvements. With the original C352, NAD confesses the complementary transistors that provide the push and pull for the bass drivers werent working satisfactorily. The introduction of a high speed servo circuit seems to have solved this problem.
The upshot of all this techno-tinkering is a vastly improved sound performance. The presentation still carries plenty of weight, but low frequencies have been toned up and no longer sound bloated. Play some bass heavy hip-hop from the Elephunk album and notes remain solid and composed, even in the face of fierce, head-nodding abuse from the Black Eyed Peas. There are brains to rival the brawn, too, and the impressive resolution is equally adept at identifying musical subtleties listen to the latest Air album, Talkie Walkie, and the C352CT unearths every ounce of ambient finesse the french do have to offer. There refined sound is always in control without restraining the music in any way, and this ability extends to an endlessly eclectic range of music.
The bass may be powerful and the treble true and textured, but its the clear and precise midrange and smooth integration of these element that are the amplifiers most prized assets. Vocals are delivered with real expression that conveys emotion and atmosphere. MC Solaars French rapping on his Mach 6 album is filled with so much feeling that you almost forget youre listening to a different language bien sur!
What we liked most about the overall presentation is the unguarded sense of space thats created by the sound: individual instruments are given freedom to breathe without compression or confusion. And superb detail only emphasizes the open sound stage, exploring the delicate intricacies that lesser amplifiers fail to expose. Another area worthy of praise is a rhythmical sense of timing thats guaranteed to get your toes tapping.
In our review of the earlier C352, we likened the amplifier to a heavyweight champion whod slugged out one to many rounds. But in true Rocky storyline style, following some intensive rehabilitation, the rejuvenated C352CT has successfully returned to the ring and restored NADs amplifier reputation.
) que C352 CT signifie NAD C352 Version C Titanium.