Long USB cable

bluejeanscable.com offers hdmi cable to 25 feet.

What does HDMI have to do with USB?

Please excuse my screw up...I had a brain freeze and mixed up USB with HDMI!

I use a 30 meter USB cable from Opticis. They make shorter lengths too. The cable converts USB to fiber optic and then back to USB. Works like a charm. I also use an Opticis 30 meter fiber optic HDMI cable.

I would recommend that you avoid a USB cable over 3.5M long. Do you have a wireless LAN in your home? If so, use a Logitech Squeezebox or Sonos to stream music from yopur iMac server to your system via wi-fi.