IMac built in 2010 Speakers Popping

This is my fourth iMac Core 2 Duo. All previous versions had the known screen issues. This one was built in week 3 of 2010 - no screen problems, actually screen looks good. Before and after all firmware updates.
But the speakers are "popping" randomly. I might of traced it backed to the following... It seems like when I am on iTunes and then start an iChat a very loud unexpected "POP" comes from the speakers. I do not know if it is a transition from iChat muting iTunes or completely random. I use iChat for audio and screen sharing. I am going to try to record the process and narrow it down to see if it has to do with how I am using the two programs. It sounds like they are going to blow up, that is how loud they are. Anyone else experiencing this loud "POP?"
Thanks in advance,
Mike

Please take a look on the system volume control, via the keyboard , and the volume control on the iTunes behind the Play and Playing screen.
If the iTunes volume control is low , and your system volume control is in the max , the i chat (or other) alarm sound will come loud .
The best way is to keep the iTunes volume control always in the max , and control the overall system control via the keyboard that way you will have a better sound balance between the softwares Alarm sound and your music .
Also the overall system volume control is on the top right corner .... you can hide or show it it going to system preferences > Audio has a check box there on the output area .
If you have a old sound system near by (with an AUX input) , you can buy the airport express and use the air tunes feature, all the music (from itunes) will go to the stereo and the system sound will stay in your iMac.
Good luck .

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