no, as long as the wattage of the speakers are compatible withe the head unit.e.g speakers 200 watts head unit below 200 ,or else you may blow speakers.
The site has a set of guidelines that are followed to make things easier and more clear for everyone. Sometimes question wording is changed to the standards of the guidelines, and sometimes it is...
There are two ways that are essentially the same and can be used freely - as long as the two units are of the same dimension (length, mass, time, etc.) of course.
You multiply with the relation...