Just got my speakers! Hooked up using rca connectors from speakers to 3.4 mm trs connector into Macbook Pro. Getting this weird wave cycle sounding background noise -- even when I play an iTunes song. It continues for a few seconds even after stopping the song.
What do I need to do? I'm thinking balanced cable, but can't find anything that goes from 1/4" trs from each speaker down to one 3.5 trs connector into my computer.
I used Garageband for recording and mixing right now.
I appreciate your help.