Simply replaced two of four factory speakers with these, and can't wait to the actual other two! They sound amazing, especially for the price. Very good bass considering they not necessarily amplified or anything, and i also can notice some sounds that simply cannot be heard by smaller speakers. Clear properly with the wattage they may have I hope not to have to be concerned about blowing them.
The only drawback is that they were supposed to fit my truck (1997 Nissan extended cab) and they really do not without a great deal of work. So don't trust that you will only be able to put them right in your vehicle, just because Amazon says they will fit. Since this is not a problem with the actual loudspeakers, I am not deducting any stars for this though.