These Olsons are extremely good quality. I have a couple of them and, to be honest, I've seen much worse quality that are so called 'audiophile' over...
After the latest round of tweaks to the system, including ‘upgrading’ CD playback by treating the surface of my CDs with "Magic audiophile liquid" :D...
Double check that you have the speakers connected correctly left and right. If not, it could be the reason the other channel hums when you touch the...