Then, I started making small changes. Changed the Digital cable from the W4S DAC2 from the inexpensive Better Cables Silver Serpent to a pair of Xindak cables. Big difference. Instruments came into better focus.
class D are extremely sensitive to power cables ... that's also why Jeff Rowland developped the Power Factor devices
I heard the 1,7 with Jeff Rowland's 312 ... I couldn't believe my ears, how good it was (huge & deep soundstage, hearing things out of my Cds I had never heard before !!! ... even on 50'000 $ speakers !
In fact I want to hear the 3,7 which is said to be even better than the 1,7 and then ...