sox 06 wrote:
Oh and that factory hole where the front speakers go in my Civic is an absolute pain in the rear. I cut out most of the plastic where the magnet of the speaker goes, but the outer ring/depression where the edge of the speaker goes in isn't quite 6.5 inches. Its about an 1/8 of an inch smaller
That is an absolute beast of a speaker. Last Civic I owned was a '97, I think I had some Kenwood 6 1/2" 3-ways in there, about 100W speakers as I recall. Tight fit with those, I can see those Fosgates being a challenge. Post a pic of what you're dealing with, maybe there's a way around it.
More things to think about re: installation. You'll definitely want an amp. A good amp. Buying a speaker like that and running it off the factory head unit is like hooking your Blu-Ray player up to a 13 inch black and white. If it were me, I would run front and rear off one 4 channel amp. Where you decide to put it might come into play in terms of how much an amp you can get away with. You can fit a pretty good sized amp under your passenger seat, or you can mount it in back under the rear deck (assuming you have the sedan or coupe). If you put it in the back you're not so restricted on size. If you decide to go front seat, you might consider buying locally so you can swap if your first choice just doesn't fit.
Let's assume you go with one 4 channel amp for now, and find something that fits under the seat. Here's your to-do list:1. Get the amp in place.
Piece of cake. The seat is held down by 4 bolts. Lean it all the way forward and lift it out. 2. Run power and ground wires.
Find some heavy wire. Likely 4 gauge if you're using a hefty amp. And buy both black and red to help you tell them apart. Not worth frying components to save a couple of bucks. They probably should
have used that when they wired your sub amp. So maybe you can patch into their connections. There should be a small opening in the firewall just behind the glove compartment. Might have to knock out a plastic plug. I would run your power cable straight from the battery, and your ground straight back to it. Here again, I would expect to see something like that already in place for your existing amp. Getting it to the seat unseen: across the door threshold there's a plate held down by screws. The rest of the carpet is held in place by occasional friction clips. Leave the carpet up, you'll need to run more stuff there.3. Get the signal from your head unit to the amp.
Get some good RCA cables. 6 feet should reach under the seat. You'll need to take the dash apart enough to get at your head unit. There's a console of some kind between the seats, this should come out too. Run the RCAs from the stereo under the carpet to the amp. Label front and back. 3a. Run a remote turn-on wire
This follows the same path as your RCAs, might as run it at the same time. 18 or 16 gauge wire is fine here. Blue is the universal color for this, but not required. Your Sony manual says the amp turn-on wire is blue with a white stripe. Should already be in use. 4. Run speaker wire to all speakers.
Here's the fun one. These have to weave around so much they take a pretty long piece of wire for each one. Don't buy the cheapest stuff you can find, get some pretty heavy wire here. Weave it around under your dash to the front of each door. There will already be a clump of wires running into the door, follow that path. If you do the back too, same principles apply. Take stuff out till the carpet comes up, run the wire underneath it. The back seat is held down by one bolt
right in the middle.
High powered systems are more susceptible to noise, you're amplifying any sound in the system. Essentially what you'll hear is the whine of your alternator. Most likely cause of this is signal wires (speaker wire, RCA cables) picking up even the slightest bit of current from your power wires. So try to keep them apart. If you find the power cable running to your subwoofer amp, run your speaker wire somewhere else. Noise can also come from grounding problems. If you ground everything back to the battery or the frame in the engine compartment you should be good.