Bose stereo question

[Dmax Grizzly]

I was wondering if my "Bose" stereo system in my truck has bass blockers on each speaker so when there is too much being put to them they won't blow. Thank's, Adam

 

[03 D-max]

mine wont blow i have put it to the test there is some sort of reducer on them because the louder you go the the less bass but this may be due to the sub haveing a limiter