Hi Gang, I have a set of JBL Creature II Speakers that I've been wanting to hook up to my new iMac. I plug them into the headphone port, but I get no sound. All of the connections are in place and plugged into the right slots, and the balance level is equal on the Mac, and the volume level is turned all the way up. I unplugged the speakers, and plugged in some headphones and those worked fine. But I just can't seem to get any sound out of these nice speakers. Any help would be greatly appreciated.