On an iMac? Time to upgrade to the Mac Pro. :assaultriThey are KRK ROCKIT 5 powered studio monitors, running off 1/4", fed by a PRESONUS FIREBOX FireWire Audio interface.
http://www.krksys.com/v3/rokit_rp5.asp
http://www.presonus.com/firebox.html
It's my audio monitoring system for Final Cut Pro editing system. :yes: