Actually you wouldnt really need an amp however I hooked up car speakers before and they did ok on the computer not too loud though. So With that said if you are like me when I am playing NFL Blitz I like it loud. If you are like me then yes I would get a small amp maybe like this...
http://www.amazon.com/Pyle-2x75W-Stereo-Power-Amplifier/dp/B001P2R1RW/ref=pd_cp_e_2 That way you have your sound covered for car speakers. Personally though I like the 2.1 Computer speakers sound really good with the subs for base. Just a thought. Good luck with the project!
