Two iconic improvement s to my system synergy last fall. One was the Windom firmware upgrade to my DAC Jr…and the other equally if not more impressive…was a complete Power Cord replacement. I have eco brand 10 awg or guage cord with no sheilding …but got me by for a couple of years…but i knew i was missing synergy in 9 components all PSA system…got a great Canadian Price for beautiful 7.5 awg sheilded PC…but i don’t know where it made the greatest difference as i replaced 10 at the same time. At about $200 Cdn each. Improvements in bass depth, Dynamics, instrument seperation, stack and decay of notes …https://nrgcustomcables.wixsite.com/nrgcustomcables/