A great program; it enhances the Harman Kardon Soundsticks I've got on my desktop and it's a great addition to the PowerBook G4 I use as a portable sound system with some old Kef Coda speakers and a tiny Sonic Impact amp. But it seems to be incompatible with RealPlayer 11 (on my Intel iMac at least), causing browsers to crash when trying to access internet radio stations. (RealPlayer 10 seems ok though). No reply on this from technical support yet!