To give you a little more technical detail...
Many modern powered speakers have a DSP (digital signal processor) integrated into the amplifier module. Yes, there are still some that do not, but these are generally cheap off brand stuff from China, and generally undesirable. The engineers select the driver components they plan to use in the speaker system, then they carefully program the DSP to compensate for the characteristics of the drivers and cabinet design they selected, so that the sound that comes out the front side is as equalized / flat / shaped (depending on intent) as they can possibly deliver. They will also program max power levels, and max driver excursion so that under most circumstances, it is extremely difficult to blow these cabinets up.
If you are a "speaker tweaker", and you think you can do better than the Yamaha / QSC / EV / etc engineers, then you should basically never buy powered cabs. Stick to unpowered boxes, and buy your own amps. Then you can change drivers at a whim...
Some years back, I bought a pair of broken QSC KW152's, fixed them up (bad caps) & played around with this very idea. I quickly concluded that the QSC engineers, with access to anechoic chambers and advanced electronic analysis equipment were able to get much better sound out of decent but mid line Celestion drivers than I was slapping in some random high end drivers that were completely outside the parameters of the DSP / amplifier module.
