I just got my brand new Dual 1.25 G4 (its no G5 but its still damn fast) and there is a staticky sorta hum coming from the speaker. Its always there, regardless of what the volume is set to. When when I run process viewer, the sound changes for an instant right before it polls the running apps (it updates every 3 seconds, and every 3 seconds the sound changes). I zapped the pram but that did nothing. Its very weird, and I'd hate to send back my brand new Mac, and have no computer at all for days. But that might be what I have to do.