Do i need an amplifier for my car audio?

[Ryan D]

i would like to know if i need one. Here are the parts i have.

DEH-P3100UB CD/RECEIVER:
http://www.pioneerelectronics.com/PUSA/Products/CarAudioVideo/In-Dash/CD-Players/DEH-P3100UB?tab=B

FRONT SPEAKERS:
http://www.radioshack.com/product/index.jsp?productId=3061128&clickid=cart&tab=techSpecs

REAR SPEAKERS:
http://www.radioshack.com/product/index.jsp?productId=3061124&clickid=cart&tab=summary

 

[Mitchell C]

you shouldnt ...just replace aftermarket speakers with yer stock ones.