I am considering switching front speakers and tweeters on an 04 limited for Alpine SPR-17c and Jl tweeters and was told id need a separate amp for them. Did anybody who upgraded their speakers use stock amp? I believe its about 250 watt... Or have any suggestions for an amp in case I would need one? Also I have 10" Alpine R in the trunk on a 1000w Kenwood Monoblock D amp bypassing stock amp for now if that matters.