Habe gerade das hier gefunden:
"Seems according to the nad webmaster, changes to the 352 were prior to it's release... Seems plausable, they gave what hi-fi one model and before releasing it to the public made changes based upon the review.... Most importantly to correct what I had stated earlier I would like everyone to notice the ct doesn't stand for circuit changes but for the titanium color
ct- color titanium.
Thank you for your recent request via the NAD Electronics web-site.
The "CT" referred to in the text is reference to the colour only, if you note the text beside the picture you will see that it is still labelled as a C352. Titanium is not available in North America.
The changes made to the unit are as follows.
We improved the DC servo circuit which tightens up the bass response. In a complementary amplifier design, the positive and negative halves of the waveform are handled by different "complementary" transistors - the gain of each half of the circuit must be perfectly balanced or there will a DC voltage present at the speaker outputs. With the original C352s, this DC offset could drift in and out of perfect balance. When out of balance the sound would not be to spec., especially noticeable in the bass region performance. The "fix" was to add a high speed servo circuit that always keeps the DC offset at zero. In point of fact, all C352’s sold to the public include this circuit."
von hier:
http://forum.ecoustics.com/bbs/messages/1/13620.html