I am planning on putting in a new head unit, amp in the trunk and running new speaker wires to front and rear. Does anyone have a tried and true plan for amp placement and running the amp and speaker wires.? I Plan to use 14guage speaker wire and 4guage amp wire. I would also need to know the best Grounding spot in trunk area.

 

people usually mount the amp to the back side of the rear seats...some make thier own mounting wall..others will mount the amp to the sub box...
make sure you run the speaker wires and power wires away from each other, so you dont get engine noise...
as far as a ground point; any practial spot in the trunk should be fine

 

make sure that the RCA cable is separate from the power wire also. i believe that is even worse for getting engine noise since any noise added at this point would be amplified since it is before the amp.

i like to run my power/remote wires on the side the battery is on and the RCA's on the other side. this is because you should try to keep the power wire as short as possible (same goes for ground.) i also like to run speaker cables down the middle of the car if possible, but thats kinda a b**** to do since it pretty much has to go under the carpet though. my second choice is whichever side the RCA's are on. as for a good grounding spot anywhere on the trunk floor will work just grind/sand the paint off. careful of the gas tank though lol

oh just another thing i thought i would mention you probably know this already but you always want the inline fuse as close to the battery as practical on the power wire

 

Thanks so much

 

A salesman at a audio store stated I really did not need to add upgraded the stock speaker wires for the 4, 6.5" speakers that will be in the accord. I will be running an amp. Your thoughts? Thanks so much!

 

Every car I have owned, I have ran amps under both seats bolted to the floor and used the factory speaker wires up to 50X4 RMS watts. No issues.

 

Not really the best idea to mount the amp to the backseat.

Amplifiers need to be level and mounted horizontally, not vertically. The heatsinks in the amps are designed to work this way. But mounting it vertically the heat rises to the side or top (depending on how you have it mounted) of the amp and will burn it out prematurely b/c the heat sits on one side of the amp and makes the heatsinks on that side unable to dissipate the heat.

 

very true. the topside of the sub box is one of my favorite places to mount them for a few reasons. this keeps them mounted level, it keeps them away from moisture and it generally allows for a good amount of airspace around them. i don't like amps that i am pushing hard to be under my seats because there isn't a whole lot of air around them and they can get pretty hot. but amps that are powering the speakers usually aren't cranked up so they don't generally make as much heat. also its convenient to have amps close to the speakers that they are connected to so for subs it makes sense to have the amp on top of the box.

 

^ Mine is mounted on top of my box as well.

People will say the vibration from the sub/box can rattle the amp apart and loosen connections. I've had my amp on my sub box for almost 5 years now w/o any problems.