I have 4 polk db650's installed in my 07 civic currently being run by the factory unit. I am new to this, but my buddy can get me either one of these amps (Alpine MRP-F450 or Eclipse EA4100) for just under $200. Any input on which one you would recommend would be helpful. I'd be hoping to put it under one of the front seats. Also, do you think it's a problem that the eclipse doesn't have the line inputs for me and I don't plan on upgrading my head unit. Any help about the amplifier and difference in quality of using the rca coverter vrs. line inputs would be helpful. Also, if you link me to the best wire kit for cheap for these that would be great.
