You would think that cinema speakers (those big honkin' speakers that sit behind the screen at the movie theatre - mine are about about six feet tall but there are many larger than that) would be impervious to damage but some movies occasionally overdrive the speakers to a point that the drivers are damaged. The most recent one that I'm aware of is Paranormal Activity 2: The Marked Ones, where there was 7 seconds of high pitched buzzing on reel 4 that could destroy the speakers.
Here is an email from Paramount that describes the problem:
Paramount has had reports of speaker damage from some theatres playing PARANORMAL ACTIVITY: THE MARKED ONES. In several cases we have been able to research, the volume had been turned up to high levels at patronsâ(TM) requests.
We are currently working to get information on speaker/amplifier brand and model to see if any particular combination of hardware might be more susceptible to damage. At this time, most of the damaged speakers have been identified as JBL model 4632â(TM)s, but this is preliminary data.
We are also working on an audio patch which may lessen the potential for damage.
For the time being, please do not set your volume at a high level on this film.
Thank you for your cooperation.
END OF QUOTE
Technicolor sent out a new soundtrack for that movie without the 7 seconds of buzzing and as far as I know that solved the problem.
The point here is that even high-end cinema audio systems can be damaged by a poorly engineered soundtrack, so I'm not surprised to find that the speakers in a cheap laptop could be damaged the same way.