Ski, welcome. As Ken indicated, a speaker that uses multiple drivers for a given frequency range doesn't necessarily sound better. The advantage would be in being able to play louder with low distortion, but at lower volume levels this wouldn't be significant. At louder volumes the cone of the driver has to move out and back farther, and the amount it can move is limited if distortion is to remain low. Two drivers playing the same sound(each with the same distance of cone movement) increase the net sound level generally by 3dB, and this can be as much as 6dB, depending on how close they are to each other.
