Integrated Amplifier for Sonus Faber Guarneri Evolution

Are you running a sub?  It is hard to believe the NAD does not have the ooomph. Crossing to a sub, and even better if you roll off the amp input bottom end can really open up some speakers. 

Maybe because the amp is it is very clean and those SF's are , well drool drool, smooth and not over emphasized.   Have you played with any eq?  It could be you are accustomed to a little midrange boost so it sounds flat?  

You are going to have to audition in your room as at your level, it is not a difference of quality, but of preference.   It could also be you need to let your brain re-program" to the different eq of the Sonas Fabers and then you'll love the NAD again. 

Always think eq first before you blame the electronics. 

Take a look at this Vitus that’ll definitely cure your dynamics and thin sound.  And with the $$$ left over you can upgrade your streamer to something from Aurender, Innuos, etc. and your DAC, both of which would then be holding your sound back.  

https://tmraudio.com/components/integrated-amplifiers/vitus-audio-ri-100-stereo-integrated-amplifier-ri100-mm-phono/

Here’s a review where it’s compared to some nice Pass and Krell gear driving Magico Q7s FYI…

https://positive-feedback.com/Issue70/magico_vitus.htm#:~:text=It%20provides%20some%20of%20the,and%20tone%20are%20spot%20on.

Best of luck.

Never had an NAD Amplifier or Integrated last longer than 45 days in any of my systems. My son loves them I just cant get them to work for me.  

 Pass int-250.

Over the last few years they have figured out how to pack a lot of rhythm and pace along with a low noise floor, great details and power. I think this is a great match.