Audiophiles hifi appreciation thread old and new

Yes, thats a much better idea. Good thinking fella. Feed output of DAC into a line level i/p on the amp. You might need to tweak the audio output settings menu on the iMac to make it see the opt out, I'm not familiar enough with hipster pooters (ducks for cover!) to talk you through that one.

Maybe. Any opto isolation will help with groundloop/noise issues. Unless it is the lack of a ground somewhere causing them!