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NAD M51 Direct Digital DAC Impressions - Page 73

post #1081 of 1262
Quote:
Originally Posted by boatheelmusic View Post

My point is if 0db is too hot, gturn the M51 down without penalty!

And my point is that it could well be normal that he actually finds -20dB to sound better than 0dB for the reason I mentioned.

post #1082 of 1262
If 0db is too hot, turn it down without deterioration!
post #1083 of 1262

Am I talking to a wall here? ...

post #1084 of 1262
Quote:
Originally Posted by Clemmaster View Post
 

Am I talking to a wall here? ...

Problem with reverberation?  :wink_face:

 

Yes, keep below 0 dB.  I've also seen -1 and -3 mentioned.  The graphs of distortion vs digital signal level suggest -10 dB is optimal ...wish I understood if that particular data relates in any way to the volume setting on M51 or only something we can't control, like the recording level.

 

Any idea whether there is a technical reason (or SQ evidence) to suggest that using a fixed volume setting would be superior to variable?

 

e.g., even apart from vol. attenuation in preamp vs M51, does fixed volume setting actually bypass any circuitry in M51?

post #1085 of 1262
Quote:
Originally Posted by Clemmaster View Post
 

 

The CMA800R could also not like the hot output's level.

 

I think it must be something like the gain just being too high rather than any sort of signal changes caused by the digital volume. I'm curious if anyone else is trying to run it at 0db or if that is too hot for everyone.

 

Of course I did set it a 0db initially, as I thought that would be best for the digital volume, but the sound is rather fat with a loss of clarity and detail. So I am at -20db with the fixed outputs and the CMA800R set at about 10 o'clock and that sounds spectacular. 

 

It's been quite a little adventure to get the best sound of this DAC in my setup. One thing I found in a post over in the M51 thread at the Australian HIFI forum is that there is a different opamp setup for XLR and RCA, and yes it does seem the magic really happens with the XLR connection.

post #1086 of 1262
So i just got back my M51 and everything works perfectly. Apparently, they just did a firmware upgrade...
post #1087 of 1262
Quote:
Originally Posted by NicoD6 View Post

So i just got back my M51 and everything works perfectly. Apparently, they just did a firmware upgrade...

 

Did you get it back with 1.43?

post #1088 of 1262
Quote:
Originally Posted by Sanlitun View Post

Did you get it back with 1.43?

Yes
post #1089 of 1262
Quote:
Originally Posted by NicoD6 View Post


Yes

Did the service agent (or anyone) suggest that reverting to 1.39 is impossible or problematic?

post #1090 of 1262
Quote:
Originally Posted by JDOz View Post
 

Did the service agent (or anyone) suggest that reverting to 1.39 is impossible or problematic?

That's what they told me from the beginning.

post #1091 of 1262
Quote:
Originally Posted by NicoD6 View Post
 

That's what they told me from the beginning.

Oh!!!   I was planning to try it this weekend. 

post #1092 of 1262

It's strange because 1.39 & 1.41 were backwards compatible and any new user that decided to "upgrade" their FW without first checking what version they have would be led by the NAD website to install 1.41 into their 1.43 unit.  If that causes the same problems, the service agents will be making some money.

post #1093 of 1262

FWIW- I just bought a used M51 which was on build 1.37. I upgraded to 1.43 (DL'd from the NAD site) w/o any issues I've found so far.

I really like this component. The DAC is more open and detailed than my Dexa'd EE DAC plus,(not huge but noticeable), and a bit more forward in the mids. Pulling my wonderful, monster Audio-GD C3 preamp out and running the M51 into my Hypex NC400 amp opened it further, for another step up in immediacy. I was worried I would lose some dynamic power and impact by dropping the C3 (those are among its many strong points), but I haven't lost any bass power or anything I can hear, so it seems the M51 is perfectly capable of driving my power amp.

At this point I see going with the M51 with my all digital sourced SS system is a total winner for me.

post #1094 of 1262
Quote:
Originally Posted by jonbee View Post
 

FWIW- I just bought a used M51 which was on build 1.37. I upgraded to 1.43 (DL'd from the NAD site) w/o any issues I've found so far.

 

Glad you're enjoying the M51 -- it's a great piece. Any word on what 1.43 brings to the table in terms of functionality, features or SQ?

 

best,

 

o

post #1095 of 1262

New here, hello everybody!

I tried today update from 1.39 to 1.43 (did not like 1.41) but I got error while update process. So I had to went back to 1.39.

Anybody can help?

What is new with 1.43?

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