My amp drives my woofer only. I dont think it drives any of my speakers ( not too sure as it came with my car and i havnt checked it ). I do have a 2 chn amp with 600W. I have a soundstream component for my front, with 2 crossovers. My rear just has a 150W rear speakers.

How do i check what is my amp driving ( still new at ice, so im still learning, hope you dontmind )

And yea i know winding down windows at fast speed uses more petrol, thats why in the highway i wind it down 1/3 way down

How am i to check if my amp powers up my HU. If im not mistaken,it does. Becuase when i changed my HU, my foreman asked wheter i have an amp. Ill try getting some photos to you anyways.

Driftmeister, my car being a 1.3 looses alot of power for some unknown reason when i on my AC. Even my 1.0 kelisa doesnt loose power. I know, weird.
Edit : The model of my HU is a Kenwood KDC-MP5039U, and has max power at 50x4 W. The speaker impedance is 4-8 ohm.