I have the premium 8 speaker system. What is the ohm rating on the stock speakers?

As I understand it, most amps are for 4 ohm speakers. So a 4 channel amp can drive 4 x 4 ohm speakers or 8 x 8 ohm speakers. I have blown my stock amp (at least the one under the AC controls) and need to replace it. Any suggestions?

Thanks!

i don't know of any that go 8 ohm in car stereo only in home audio.