I wrote the Sonos article for Dagogo.com, and I tested for those very things. Bottom line, a good high end cdp is still better than Sonos, even when Sonos is fed via digital coax to an outboard DAC.
Both the cdp's on board DAC and signal fed to the same outboard DAC as the Sonos used were superior.
For my casual listening I use the Sonos, but for critical listening I return to the cdp. The difference is not night and day, but enough to merit continued use of a good cdp.
Now, a $500 cdp as transport? Well, that might be a wash in terms of performance. If you get a very good older cdp it still has a chance to outperform Sonos.
I am not a fan of the "cheap transport and expensive DAC" club. The lack of quality comes through in the end result if the cheapo cdp is used as transport. So, if you're going to do it, put as much as you can into the transport; you'll get the return on it in sound quality.
Both the cdp's on board DAC and signal fed to the same outboard DAC as the Sonos used were superior.
For my casual listening I use the Sonos, but for critical listening I return to the cdp. The difference is not night and day, but enough to merit continued use of a good cdp.
Now, a $500 cdp as transport? Well, that might be a wash in terms of performance. If you get a very good older cdp it still has a chance to outperform Sonos.
I am not a fan of the "cheap transport and expensive DAC" club. The lack of quality comes through in the end result if the cheapo cdp is used as transport. So, if you're going to do it, put as much as you can into the transport; you'll get the return on it in sound quality.