The factory Bose system is tired. I'm replacing mine with an Alpine system. Anybody mounted a 4-channel amp in a C4? I'm thinking of using the storage compartment behind the driver seat. Also, where's the best place to ground an amp on this fiberglass car? And one last thing, anyone know how to get the Bose speaker enclosures out of the front doors? Thanks.

 

You wil find lots of information on aftermarket audio installs in the Audio/Electronin section of the CF.

Amp installs, C4 aftermarket upgrades and BOSE system issues are all discussed there with some very good info.

Specifically, the storage compartments aren't that big and you would most likely have to find a way to vent the compartment if the amp generates any amount of heat.

 

This in itself can be an all day job................but it has been discussed at length here.

 

cubby works for the location. grounds can be found at the seatbelt bolt holes. most of the A pillar is metal and the factory uses it for various grounds, tap a hole and you're good to go. would give you help on the speaker but i have a 1990, it was simple as could be to remove. i've heard the 84-89 aren't so easy.

 

Under the pass seat is perfect. The seat stud is a good ground and quite handy. Here is a pic of my old amp, big, but fit. Currently I have a 4 channel JL amp and both crossovers for my focals, stashed under the seat.

 

manual seat racks agent?

 

Pass side is.

 

Thanks for the replys guys. The grounding had me concerned. Knowing the A pillar is metal is a big help. Unfortunately the amp would not fit under the seat so the cubby is the only place left.

Nice ride Agent 86.

 

 

I mounted mine on the rear bulkhead like in the above pic but a word of caution...

Directly behind the bulhead is the gas tank so screwing into the bulkhead is a no-no. So instead of attaching it directly to the bulkhead I attached a piece of plywood underneath the carpeting. I'm sure I pulled the rear carpet out temporarily to do this. The bottom edge of the plywood attaches to the floor with 2" shelf brackets. On the bottom I believe I mounted the bracket so the hole that was drilled for the bracket to mount to the floor was as far back toward the rear bulkhead as possible. This meant that the lower L bracket had to bolted to the floor before the wood was placed between the bulkhead and the angle bracket. I believe the reason for this was if I mounted the L bracket so the bottom leg faced toward the front of the car there wouldn't be access to it from underneath because of a metal brace. On the top edge the board the 2" shelf brackets attached to the existing hardware bracket bolts under the package tray for the hatch release parts. The angle brackets had to be bent a little further open due to the angle of attachment on the bracket bolts and the plywood. I used nut inserts in the wood panel on the side toward the bulhead. This way bolts with no nuts could be used to secure the board to the brackets. The 2" angle brackets used 1/4-20 bolts just long enough to catch the blind nuts on the backside of the plywood so the plywood is not acutally attached to the rear bulkhead at all, it's attached at the top and bottom edges. Once the carpet is reinstalled the amp can be screwed through the carpet into the wood. The board was long enough for the amp plus a couple or 3 inches longer. Alongside one of the lower mounting brackets you can drill another hole to pass your heavy ground through to a chasis bracket like the braket that holds the tire carrier. Power, radio and speaker wiring are run under the carpet to where they have to go.