Audio Systems: Is Amplifier needed?, sony headunit, rear speakers

Question
Hi

I have a Sony headunit(52w*4), two rear speakers (320w 4-way), two front speakers (190w 2-way) and one sub-woofer (380w). Do I need an amplifier? If yes, please let me know how do I go about choosing it.

Thanking you for your attention.

Sincerly,
Harishankar V L

Answer
Hi!
You can use just the radio for the front and rear speakers and just add one amp for the sub wich does not need to be very powerfull since it could overpower the highs (front and rear).
About the amp don't spend too much in a exotic one since for less than 500w any type can sound good enough.