A Single POP Sound from Left speaker, after system heavy load.

Hello From Russia)) I bought Brand New Macbook pro 15" Late 2011 Ci7, this is incredible machine. But a month past and i started to notice a very strange behavior:
When i using mac for resource "Eating" application or processes my computer starts to Heat-this is normal.
When i close all the apps here starts interesting) I have Istat installed, so i can see what temps are in my system. Computer is cooling, and when cpu reaches 50-55 degrees (Celsium, from 80 degrees, because of heavy load) ,my left speaker produces a single loud pop sound. (like something turning of may be)
In other terms of use absolutely is fine! It is very strange and i dont know is normal or not(
Thank you very much, and sorry for my english.

That is not something I would expect.  I would go to a repair facility and have it checked.
Ciao.

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