I just saw on the weiss website that there are now "4-channel" versions of both the 501 and 502, and they are considered upgrades. Go to the site and read for yourself - I wasn’t that interested so didn't take the time to delve into, just noted it, so can’t comment further as to what the improved version involves
WEISS 501-502 DAC
I believe the Weiss 502 Dac came out in 2017. Does anyone know if there have been any up-grades to that unit since it's release date? in other words, is the current unit the same ,or have there been any sonic improvements? Thanks for any feedback. Sam