LME49720 & 49720 improvement

[Emmathom]

Hi Gentlemen

I need your knowledge & advice please

I recently opened my DAC (ES9018 + Xmos) and noticed LM49710 & 49720 at output. I must say that I don't have the DAC schematic.
My questions are :

- are they "good OPAs" ? where would you classify them in a "good sounding" scale ?

- if they can (must ?) be replaced which ref. do you advise to possibly improve the sound ?

Thanks for your answers !
Best Regards

 

[ccaudle]

are they "good OPAs" ?

Some of the lowest distortion op-amps ever made. There is no technical improvement to be made by replacing them unless there is some other design fault which uses them in a non-optimal manner.

 

[Emmathom]

Thank you @ccaudle !
Happy to notice that some chineese manufacturers work for quality.
I use this DAC since 2010 (my first and only) and the sound is really good. Even the board is well built...

 

[elskardio]

Thank you @ccaudle !
Happy to notice that some chineese manufacturers work for quality.
I use this DAC since 2010 (my first and only) and the sound is really good. Even the board is well built...

I wouldn't change a thing! Those are all high quality components. You even have Nichicon Muse Capacitors.

 

[Emmathom]

I wouldn't change a thing! Those are all high quality components. You even have Nichicon Muse Capacitors.

Yeah and Wima FKP2 too ! Great

 

[ruffrecords]

The only downside I can see is some of the soldering looks like it has been done by a 5 year old

Cheers

Ian

 

[Emmathom]

The only downside I can see is some of the soldering looks like it has been done by a 5 year old

Cheers

Ian

Yes I must refresh/resold that with silver solder one of these days...