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NAD M51 Direct Digital DAC Impressions - Page 82

post #1216 of 1225

Oops, must have been thinking about something else. 

post #1217 of 1225

In case anyone's interested, here is an M51 in excellent condition.

http://www.head-fi.org/t/734087/nad-m51

post #1218 of 1225

Has anyone tried to reverse FW from 1.43 to 1.39? 
Mine is 1.41 from the factory and updated to 1.43 but wanna try the 1.39 version.

post #1219 of 1225
Quote:
Originally Posted by ellevoid View Post
 

Has anyone tried to reverse FW from 1.43 to 1.39? 
Mine is 1.41 from the factory and updated to 1.43 but wanna try the 1.39 version.


you need to roll back to 1.41 first, then 1.39 or else the M51 won’t work.

post #1220 of 1225
Quote:
Originally Posted by LCfiner View Post
 


you need to roll back to 1.41 first, then 1.39 or else the M51 won’t work.


Downgraded successfully. Thank you so much ;-)

 

very first impression is like everyone said 1.39 has a little fatter bass and more kick, but 1.43 seem to sound less congested/a little better separation.

 

So for my system (HD800, HE6), I think 1.39 is suits me better.


Edited by ellevoid - 10/18/14 at 8:22am
post #1221 of 1225

How this NAD M51 vs Audio GD M7?

post #1222 of 1225

I never heard of Audio GD M7, but their products I tried they all have kind of metallic sound.

 

I found that when I connected NAD M51 to two different amps. One using XLR out and another one use RCA out.

The RCA out will sound totally suck, bass is gone, high is gone, no dynamic at all.

 

Is that normal for NAD M51?

post #1223 of 1225
Quote:
Originally Posted by ellevoid View Post
 

I never heard of Audio GD M7, but their products I tried they all have kind of metallic sound.

 

I found that when I connected NAD M51 to two different amps. One using XLR out and another one use RCA out.

The RCA out will sound totally suck, bass is gone, high is gone, no dynamic at all.

 

Is that normal for NAD M51?

No. Probably more of a reflection on the amps than the M51. I've used it into both types and found its sound consistent.

post #1224 of 1225
Quote:
Originally Posted by KmanChu View Post
 

No. Probably more of a reflection on the amps than the M51. I've used it into both types and found its sound consistent.


And can you confirm the sound differences between the inputs that some refer to? Are they still there with updated software? Thanks.

post #1225 of 1225
Quote:
Originally Posted by unsleepable View Post
 


And can you confirm the sound differences between the inputs that some refer to? Are they still there with updated software? Thanks.

In my personal experience, I still run the original firmware on mine and never updated it because I felt no need. The accounts I from NAD directly was that the firmware changes only ever reduced the volume output by 1dB to prevent digital clipping highly compressed recordings. I honestly haven't looked for improved USB performance by chaning the firmware. That said, I think the inputs are all good, but to me a VERY good SPDIF converter gives better performance over the built in USB. Also, a USB power conditioner like the Schiit Wyred or iFi iUSB Power helps the USB input also. I think that the AES input is the best, this is probably because it is transformer coupled and providers better electrical isolation from the source. But the coax input is also very good when used with something like an Audiophilleo. Don't get me wrong, the USB input is good, especially with a power conditioner. But the addition of a good SPDIF converter, IMHO, takes the performance level to another league.

 

Quote:
Originally Posted by ellevoid View Post
 

I never heard of Audio GD M7, but their products I tried they all have kind of metallic sound.

 

I found that when I connected NAD M51 to two different amps. One using XLR out and another one use RCA out.

The RCA out will sound totally suck, bass is gone, high is gone, no dynamic at all.

 

Is that normal for NAD M51?

One reason XLRs can sound "better" is that the level (voltage swing) is much higher balanced than single ended. So if you are not volume matching then the simple higher volume will sound like it has more impact, bigger, etc. All you are really getting is the volume turned up.

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