I plan to rip out the stock AM/FM/Cassette and factory door speakers and replace it all with an Alpine head unit (already have), new 6 1/2" door speakers and new headrest speakers. While I have done a number of car stereo installations over the years, I have a few questions before I jump in.
1) Are 6 1/2" speakers "drop in" for the doors, or do the holes need to be opened up? Any depth restrictions?2) From what I've read, pretty much any 3 1/2" speaker will work in the headrests. True?
3) I bought a Metra wiring harness to connect the head unit to the factory harness. Do I need to be concerned about the phasing issues I've read about? My car is NOT factory-equipped with headrest speaker wiring, so I'll be pulling my own wires back to the head unit. Because of this, I shouldn't need one of the pre-fabricated headrest wiring harnesses, should I? I figured I'd just wire right into the wires coming from the head unit's harness.4) Should I go ahead and pull new wire to the doors, or is the factory wiring okay (i.e. in phase)?
5) What's the common method for wiring the headset speakers if they are being powered by an aftermarket head unit? Parallel or in series?Anything else I should consider before diving in? I was considering installing my 4-channel Kicker amp inthe trunk along with a Bazooka sub, but think I might try the easy way out first and see if the sound is good enough. Any comments on this? I'm a middle age jazz/rock fan, and while I occassionally like it loud, I am not into heavy bass!