[Sanlitun]

There is an interesting new addendum to the original Stereophile review where they talk about the v1.39 firmware vs. others:
 
http://www.stereophile.com/content/nad-m51-direct-digital-da-converter-john-atkinson-may-2014

 

[ellevoid]

  There is an interesting new addendum to the original Stereophile review where they talk about the v1.39 firmware vs. others:
 
http://www.stereophile.com/content/nad-m51-direct-digital-da-converter-john-atkinson-may-2014

Interesting, from footnote if I use 1.41 and increase volume +1 db it should sound as good as 1.39?

 

[screwdriver]

  Word to the wise -- I took the plunge to 1.43 from 1.39, and unlike 1.41, I can't revert. Flashing with 1.39 leaves 1.43 installed. No way back, for my unit anyway, it seems.
 
So if you're a 1.39 fan take care in upgrading. You may never be able to go home...again.
 
EDIT: You can get back to 1.39 via 1.41 -- 1.43 >>> 1.41 >>> 1.39. PITA, but it works, and confirms 1.39 as the best-sounding to date, to my ears at least.
 
best,
 
o 

Orkney , what serial number is your nad M51?

 

[screwdriver]

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

Nico what serial number is your Nad.
 
im checking as the version 1.39 has a disclaimer that it can be used for nad m51 with serial
 
anything higher in the recommended serial can make the and inoperable they say .
 

Modification applicable for units prior to serial number:

Applies to units before serial number code - H25M51XXXXX i.e. from H24M51XXXXX and below

 

[NicoD6]

H35M51XXXXX... I noticed the disclaimer after. I assumed it was the same machine but i guess i was wrong.

Here is a picture of my M51 (top, newer) vs my friend's one


You can see that the finish is now improved. It is finer.

Edit: serial is H39M51XXXXX, not H35M51XXXXX

 

[Sanlitun]

Mine is a H39M51XXXXX which came with 1.43. I had thought 1.39 was not a good idea for me and I guess this is the case.
 
What I really wonder is if there are any physical changes to the circuit boards.

 

[NicoD6]

Actually, i made a mistake. Mine is also H39M51XXXXX.

 

[wotef]

Hey guys, I tried out 1.43 for a few days then went back to 1.39 (with no problems) and the strengths of 1.39 remain - deeper bass and a more meaty sound! 

 

[screwdriver]

  Hey guys, I tried out 1.43 for a few days then went back to 1.39 (with no problems) and the strengths of 1.39 remain - deeper bass and a more meaty sound! 

what serial number is yours?

 

[wotef]

H29M5102456

 

[Suopermanni]

Hello NAD M51 users,
 
I have a question. Has anyone got the NAD M51 working on a Windows PC? I don't know how to get the device to output sound through HDMI. I have HDMI outputs on my mobo and graphics cards.

 

[argentum]

Isn't there Digital display Audio choice in your Windows sound options? By the way which graphic card  are you using ?

 

[wotef]

I don't have to do anything other than plug it in for it to work. The laptop autodetects the connection and handshakes with the NAD.
 
If it makes any difference, I plug in the NAD first, then the laptop, then hit the HDMI input on the remote.

 

[wotef]

You may want to check the device settings in the "Sound" tab of control panel. Set the HDMI/NAD to be default, perhaps?

 

[Suopermanni]

I got it working, guys. It appears that the mobo's HDMI only can be used for display purposes.