Can anyone tell me if it is possible to run two sets of powered, external pc-type speakers from the single 3.5mm output on the iMac? I would like to be able to have the same music playing in two rooms in my house, from the iMac. I have considered using Logitech's Squeezebox, but you can't play the same music source through the pc speakers and the Squeezebox at the same time. If I use a 3.5mm dual connection adapter in the single output in the rear of the iMac, will the sound card and power supply be able to handle outputting to two speaker systems? As many powered pc speakers come with their own volume knobs, I was thinking that I could alter the volume of each set individually. My other problem with this setup is that I will need to run one 3.5mm stereo cable for about 10 metres. The other is directly connected into the back of the Mac in the normal way. Has anyone tried this setup or are there any other solutions that might solve the problem in a different way?