CPS Extended Service Plan (more info)
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These are a solid speaker for the money. I upgraded my factory speakers front and back in by 98 f150. They are a clear improvement over stock, but do lack the bass at this point. I am running them off an alpine head unit pushing 18 watts rms. I am looking into which amp to buy for them. I want to add a sub to get a more complete sound. I am not trying to rattle my doors off. I would buy these again. If I were you, plan on pushing these with an amp for them to totally impress.