I used the short giveaway USB cable and a short £10 optical cable. The USB is a quality RF specified cable, but sure nothing fancy. And yes, under the circumstances of this test, galvanic isolation would not make a difference; but YMWV depending upon the source, and whether the output is connected to a power amp.
Rob
Incredible. You must be filtering the crap out of the USB input noise, even more than in the Mojo (there's a little more space in the Hugo 2 to do this and other things I guess).
Also, why does it depend whether the output is connected to a power amp? Just asking out of genuine interest, not in a smart ***** way
And can we get some pics of the Hugo 2 board !
Not to dwell on the Mojo but USB galvanic isolation made a huge improvement in my system. Quite shocking actually (Surface Pro 4 i5 > Powered USB Hub > Curious USB cable > Mojo). But unfortunately high speed USB galvanic isolation (for 24/96 music and above) doesn't come cheap. I am using the PS Audio LANRover which while expensive, really shocked me. For whatever wrong reason I was expecting increased smoothness by adding the LANRover but the overly smooth sound of the Mojo disappeared and all the treble details I was missing with the Mojo suddenly came alive. I guess that's what dirty PC USB noise did in my system. Quite a revelation for me.
Back to the Hugo 2, the plus side is I already have the USB isolation gear ready to go for the Hugo 2, which I will use to power my Sennheiser HD800S and as a Dac with my PrimaLuna Dialogue Premium in my speaker system.