And do you understand the physical characteristics of a high wattage speaker? Size? Weight? and so on? Lots of things have multiple ratings for multiple scenarios. For example, I can run an a transformer at 40MVA average, but peak at 60MVA without additional cooling. This allows me to use a smaller, lighter transformer than if I had specified a 60MVA continuous rating. If I have correct protection circuitry, the system will function just fine, and in fact is more efficient, since I can get away with passive cooling on 40MVA, where at 60MVA in a similar form factor, I might be unable to.
The only thing I can see here is that Dell did not provide the speaker/driver specifications, although the much publicized "we don't support VLC" is sort of a clue. They attempted software protection, by trying to specify what software was supported - this is not an ideal approach, but it isn't nonsensical either.