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The stock stereo is okay in the SE -- JUST okay -- but I've been dancing around an upgrade for some time. Last night I ordered an Alpine KTP-445U amplifier and JL Audio C3 convertible component speakers. Frankly I'm nervous whether the amp will screw anything up: Has anybody found a wiring harness by Metra, etc. that plugs into our existing harness so we don't have to cut a bunch of wires? The C-max does not exist in any installer database I could find. Does our radio circuit have at least a 15 amp fuse? (I think 20 is typical for Ford but not certain in our case.) The KTP-445U is a super-efficient digital amp that can share the radio's power wire rather than requiring an amp kit, as long as this is the case.Will the car's active noise cancellation still work, or will the amp mean the out-of-phase sound is too loud and thus increases road noise instead of canceling it? Will the lady that lives in my dashboard retain a normal speaking voice, or will she shout at me? Will my car's blessed exemption from the 12volt battery problems continue, or will adding draw to the system strain it to where it malfunctions? Will cutting wires in the wiring harness to install the amp, threaten my warranty?The cost of the equipment...and installation, in the extremely likely event I leave it to a professional...is daunting enough even before all that...