This is the setup i used for live sound for a band concert. It starts with my G5 iMac. My iMac is tethered by Bluetooth to my Blackberry Pearl for wireless internet hook-up. Sound wise- the iMac is Hooked up to a Mackie 1604VLZ that is running alongside an Alesis Effects Processor, through a Behringer Compressor, then through a 2 Channel EQ. Speakers were JBL MR-835 3-Way powered by a QSC Powerlight Amplifier and a Crown XTi 4000 Amplifier powering a JBL MRX528S Dual 18" Subwoofer.