May 11, 2020
Ray 7 posted:
When I use the line out there is constant humming. Why is that? I have done updates.
What downstream device are you connecting the S1 Pro line out to?
If you use the AC power, are the S1 Pro and the downstream device connected to the same AC power source?
To solve the buzz issue when running on mains power DO NOT disconnect the safety earth/ground in the mains cable. If plugging both devices into the same multiway or socket, or using balanced connections doesn't help (maybe the source device does not have balanced outputs) then a special signal lead with the earth/ground disconnected at the destination end (i.e. the S1 end) is worth a try. If that doesn't work then a transformer DI or Isolating box will solve the problem.
Apologies, the earth disconnect is best at the downstream end, so as you are using the S1 as the source in this context leave the earth connected at the S1 end and disconnect at the other end.