Mustang Mach 460 Help

[Timothy Colter]

I am new to this site and audio installations with my 2000 mustang with mach 460. I recently replaced the head unit and have been looking into replacing the speakers. I keep hearing that the factory amps split the sound between the tweeters and woofers in the door. I wanna know if its possible to only replace one amp to stop the splitting? or what can i do to send full range to the woofers so that when i put a aftermarket speaker in it plays more than just bass.