I recently upgraded to the DS, and needless to say, I’m am thrilled with it, but I am surprised that I am getting decidedly better sound quality from USB. I have hundreds of hour of burn-in with music and burn-in tones from Track 8 of the Chesky Test and Burn-in CD using both the USB and Bridge inputs.
I am using Uptone Audio’s USB ISO Regen and Ultracap LPS-1 galvanic isolation power supply, which has greatly improved the performance of USB. At worst I would have expected the Bridge II to sound equally good, but it is clearly not to my ears. Less bass, thinner, harsher high frequencies. The Bridge II volume setting needs to be lowered to 94 to equal to spl of the USB input.
I am running JRiver MC 24, so all variables may not be the same because JRiver requires use of DLNA to play to the Bridge II, while the USB connection is direct.
Can others confirm or contradict my results or offer any thoughts on why I’m getting this result?