sir scope_hunting,
maayong gabii kanimo.
it's a matter of capability and delivery.. your amp might be capable of delivering the needed juice but your speakers might not deliver the desired results.
pwede mana nimo buhaton. however, based on the speakers you've mentioned above the results might not be too good.. naay dakong posibeledad nga masapawan ang tingog sa ubang speakers nimo kay dili sila pareha ug specs.
I would heavily suggest that if you are really bent on installing multi - speakers in your car, mas maayo pareha silag brand and specs so that mas dali ang tuning nimo.
furthermore, for a multi - speaker system, let us also remember to match the optimum impedance sa amp nimo versus sa total speakers nimo.
for more info kindly click on this link sir -->
Impedance Matching of Audio Components
hope i was able to give you some ideas sir...
have a great ahead!!