Sonore Streamers

[Confused]

The USB implementation in itself didn't change (yet) in the Pro. The same DUET boards are fitted so any differences must come from secondary changes like changes on the mainboard PCB routing or improved AC isolation/decoupling. Another possibility is that you have a DUET board now that has slightly better components, clocks for example do each show different performance numbers if you'd measure and compare them (within a certain spec range/bandwidth of course).

Interesting.  I have to say that the bass issues I noticed with the mR and Melco via USB were far less apparent with the CAD CAT, which was running a separate LPSU and CAD's 'Ground Control' box.  I am as sure as I can be that the USB implementation in the Pro is different, so my money is on some kind of improvement in isolation.  Although thankfully I do not have to worry to much about this, I have nothing whatsoever connected via USB!