Originally Posted by Phil Tomaskovic
I sent Bob Moran at NAD an email on this and will report back. His out of office reply said he was at CES and will be back Monday.
Yes the new HD models use a different Audyssey HD Mic, denoted by a Silver connector, versus the Gold connector of the Non- HD Models.
The new Mic is available at NAD Parts; 1-800-263-4641 ext. 4383.
I have not been advised what the difference are between the 2 mics.
If Audyssey Calibration runs correctly on your unit with the 'Gold" MIC, then I would not be concerned about updating it.
I further researched your question on the Audyssey HD Microphone.
The supplied microphone comes directly from Audyssey and has a minor difference in response levels. The microphone supplied with our T 785HD has a 2kHz difference from the earlier microphone made available with our T 785 (non-HD). The T 785HD's firmware is also different as it includes the new microphone correction curve."
I hope this inforamtion is helpful.