I have found speakers but not sure they will fit. I head stock speakers were 6x9 but my question is there any other sizes that fit that? here what i have found: ( looking for bottom door speakers)

http://www.crutchfield.com/p_113KFCP...FC-P709PS.html

http://www.crutchfield.com/p_113KFCP...FC-P509PS.html

Here is the amp i am going to be using:

 

i would first call the dealer and ask for parts..or hit up a "20.. scion tc oem" website..those will have oem parts which means oem part numbers, and DIAGRAMS to check everything out my man..had to do it for hoses

 

I just curious why you want to change your speakers? More power?

 

I figured it out and ordered everything but basically I bought it used and came with Kenwood ddx 518 head unit it which is the touch screen one. The head unit ended up pushing to much power to the speakers and blew 1 or 2 so I'm replace them plus I want a little more power