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Works really well, i live in an area where we regularly have temperatures that are much lower than will allow you to start your car with a blockwarmer, but despite that these work perfectly well - got them set up in the trunk.
Have been hit twice since i put these in, and sitll no problems :)
Love having the subwoofer control up in the front - that way i dont have to do it through the head unit, just gotta turn the knob!
6-1/2" 800W HF Series Full Range Car Speakers (HFI 65CX)
8 Gauge Amplifier Installation Kit
1000W MonoBlock Class D Car Subwoofer Amplifier (KAC8105D)