Hi, i've got a problem with the audio on my c2d iMac when using external speakers. The speakers are powered monitors. Basically, when i first play a song or cause some sound to come out of the computer, there is a slight pop before it starts playing. This is fine, but 20 seconds or so after i stop playing a song, there is a really loud pop noise from the speakers. Once this has happened, there is a quiet of squeel from the monitors, the same sound that is heard when the monitors are on and connected but the computer is off. This has only started happening since i re-installed tiger and updated to 10.4.10. There is a big discussion about it on the apple forums from last year but no-one worked out the problem. Apple support were useless as ever, basically just reading all the stuff i have access to anyway. I hope someone is able to help! Cheers Edit: i forgot to say, have done a hardware test and a pram reset.