I wouldnt say its hard, but very time consuming. Especally if you doing it for the first time. It also helps to have two people the first time you install. But i would say as long as you know where the wires need to go, you will be able to find areas to sneak the wires through.
Try it, if you find its more than you want to do, take it to a shop.
What model Camry do you have? I can tell you exactly how to do it EX: how the panels + seats come apart, where to drill a hole in the fire wall etc...
i want to run the wires from the battery to the trunk, so i can hook up an amp, sorry for the delay i was eating
So you need to drill a hole through your firewall then, or did you already have it done? If not on the drivers side of the car there are 2 bolts holding the break/gas pedal in place. If you pop your hood and look inside at the wall in the same area you will see these 2 bolts poking through. If you are looking at the wall from the front of the car they stick through over to the right of the fuel injector and about 3 quarters of the way down the wall. This is a fairly open space and you will need to drill through some sound absorbing material and two small sheet metal walls. Use a SMALL drill bit first to drill an initial test hole. It helps to have someone looking in from the engine compartment side to tell you imediately if you are drilling through at the wrong spot. Start drilling above and a little over these 2 screws in the wall with your small bit until it goes through. Have a friend hold a portion of wood to protect any components from being stuck by the drill bit when it pokes through. Once you have made a pilot hole make sure its all clear and use a drill bit slightly larger then the diameter of cable you need to run through, proceed to center the bit and drill this hole. Install a grommet or JB Weld the cable in place after your done running the wire to prevent the metal from cutting the cable over time. Now what you want to do is tape the end of the power cable down by the battery terminal DO NOT HOOK IT UP DO THIS LAST. Then take the rest of the cable and run it along side of the compartment down into the hole and feed it through CAREFULLY, THE HOLE IS SHARP! Once you have the cable through you can run it up under the dash to the right tell it meets the center console. Use a flathead screw driver and push the power cable up under the center console plastics along the side to the back where it comes out in the back by the passenger side foot area. From here you can run it under/over the carpet where the little bump on the floor is in between right and left seats then up UNDER the rear seats. The front of the seats lift up enough with some small force to push a cable through. Shove your arm down under the seats at the back and grab the cable. Put the seats down and pull the rest of it through into the trunk!
how about the RCA cables from your HU to the trunk?
I am kinda lost now. You say you already have a AMP set up. If its already set up then all you really have to do is splice the wires (remote and get y conects for RCAs). But for your Power and ground, the grounds will need to be seperate for each amp. How big is your amps?
The one i have right now is a 851s Power RF, and thats for my subs, I want to put a 4 channel amp for my 6x9s and my mids. The other amp i have is a Kenwood 750 watt amp ( i dont know how much it really puts out)
I was asking if u need to run the RCA from HU to trunk. You can only run the same power wire from the battery to 2 amps if a few conditions are met. The gauge wire MUST be low enough to be able to handle the current draw. You MUST use a fused distribution block and run 4/8 gauge wire to the amps from the outputs of the block. You can use a simple Y connector and use the same wire for the REM; they require very little power (something along the lines of 4 volts).
I guess i didnt really clear anything up, ok, lol, right now i have the Fosgate amp hooked up to my subs, I have the 6x9s and mids, but they have no amp, so i bought that kenwood amp to power them, thats the other amp i want to add.
Alright then, for 750 watts 8 guage power cable is fine if it resides in the trunk. You MUST have another fuse holder as close as you can get it to the battery terminal like the other power cable. You can run this cable the same way the other cable is through the car. The REM(s) can use the same wire, it uses very little voltage.
One more thing, when bolting down the ground make sure you *KNOW* where it will come out on the other side. Your fuel tank (under the trunk area), electrical wires, and vacuum lines all run through out the car.
Depends if your satisfied with what you hear then there is no need. Little things can also be done to improve the SQ of your vehicle. If you still want to improve the sound quality of your system after these things then EQs and other stuff come in and can be quite pricey