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yes
No. If you are looking to install a amplifier, either install an aftermarket head unit or buy an amp that has speaker level inputs.
There will be a wire on the back of your head unit that turns the amp on. It will be marked something like "rem" "remote" or "amp." If not, consult your head unit manual.
do you have an aftermarket head unit? Either way, you will need a wiring kit. Depending on what size your amp is, you may need a capacitor as well. Brands such as Scosche and EFX are 2 cheaper brands, but seem to work just as well for less cash. Expect to pay anywhere from $10 to $120 (+) depending on the quality and length of the wires.
chances are you cant , you need the red and white plugs on the back of your deck to plug your amp into
you would just install them like you would on a normal car, but I'm assuming you are using the stock head unit which doesn't have RCA outputs, so you will need to buy a line output converter to run the RCA cables from the head unit to the subs
The external amp is located just behind and slightly lower than the head unit. Follow the wires coming out of the back of the head unit, they lead directly to the amp.
Install a subwoofer, amp, aftermarket speakers, and a head unit. Possibly, the easiest way to get the best out of your car audio system is to upgrade the speakers.
yes, easily...you will need a new head unit though. if you want a sub you will need a head unit with RCA outputs to connect the ammplifier. i run a panasonic head unit, 1200w amp, 2 12" subs, 4 mids and 2 tweeters in my 89' familia
No
Yes you can... if you still have a factory head unit then you will need what is called an RF modulator which you will connect to one of the speakers. This will give you the Av imputs for your amp.
on mine i had a premium sound system package stock. i had to bypass the stock amp to run the head unit even though i am running it on the pre amp from the head unit. the speaker will notwork unless you bypass the the stock amp.