best budget cheap amp
 

Hey, been a long time since I posted. doing this for another car, size isnt a concern, tight budget ~$100 for a 4 channel amp pushing at least 4×100 rms to 4 Kicker CS65's. I dont mind going used just need to be pointed in the right direction...
As always thanks for your help!

That's hard to do for around $100. You may get a 2 channel 4ohm, 100 watts a channel but nothing worth while in 4 channel.

Harman, why do you need it to be 100 X 4? Are you just going off what the speakers say? For 100 bucks you might want to try the used section at DIY mobile as they are always selling some good amps for cheap.