NAD C658

I purchased my C658 this week and love it.  I primarily purchased it to stream Tidal HiFi (including MQA).  Out of the box it sounded just ok, but I've left it on for several days now and it sounds better every day.  Streaming Tidal sounds better than CD.  I'm also trying out the internal phono pre-amp versus my internal PrimaLuna phono stage.  At this point it certainly isn't obviously inferior or superior.I set up the DIRAC Live today.  I wouldn't say this is a game changer at this point, but I haven't tinkered with the optimized equalization that the software develops.  At this point the DIRAC derived sound is tighter in the low end, smoother, and slightly subdued.  The BluOS app seems solid.I hope this helps 

I have owned one for about a year and have been pleased.   As said took a while to burn in.    The BusOS is great.   I only use it for a streamer.

I tried one but sent it back, the volume control caused distortion. Could be it was only on that unit but I ended up with Anthem using ARC. 

could anyone update this thread on how well the dirac worked on the and unit?  It looks like a great solution, but i don't think it has digital out, and thus you are wedded to the internal dac

The dirac doesn't cover 20hz - 20khz unless you pay $99 for the full version. Trying to remember but I don't think it had digital out either though the DAC in it is pretty good. Streamer worked great no issues I had with it. Other than problems with the volume it was a nice unit like I said it must have been an isolated issue I haven't noticed anyone else mention it.