Also remember not to wire speaker wire next to power wire.
Indeed!
As for the earth, can you not just use any random bolt sticking out of the bodywork? Anyway there should be one associated with the boot release trigger thing.
Generally it's recommended you use the same gauge for earth as your live feed. The first check with poor audio quality is a crappy ground. Generally it's best to scrape the paint off around a suspension bolt and screw the wire under that using and eyelet crimp.
Unless I'm mistaken, car batteries supply 12V (or near enough) when not being charged by the car, and 14.4 (or near enough) when being charged by the car. Although I could be wrong.
Oi tink so. Nothing to be concerned about.
Didn't think about a multi channel amp.. Was going to just get another separate amp for the sub. However a multi channel one might be better, wasn't going to get a sub for a while but it would save routing two lots of wires and taking the seats out twice!
Any recommendations on a decent multi channel amp? Suppose its hard to make a decision without knowing what sub I want..
Edit: Also why do some list 12v and some 14.4v as well? Shouldn't the battery just be supplying 12v?
Edit 2:
Hertz 4 Channel amp
Cheaper Hertz amp
You'll only need one, high gauge wire leading from the battery to the boot. The rest can be wired (use fused distribution if you want to do it properly, which you really should, otherwise just wire them in parallel) from this single feed, regardless of the number of amps. As long as the gauge of the wire is sufficient to carry the current.
You'll have to run a pair of wires from your amp for each speaker in the car, unless you run them in parallel (giving mono sound, which you can also do for a dual voice coil sub) which also handily enough provides you with half the normal resistance (so a 4ohm load becomes a 2ohm load).
So if you've got a sub, and two front speakers, that's two sets of rcas, and three pairs of wire. It's best to use sheilded, but not essential, just don't run them alongside the power cable as previously mentioned.
Either way, are you really taking the seats out, the carpet and all that jazz? For this level of install running it behind the plastic trip along the sides of the car would be sufficient.
Whilst I've not much experience with Hertz amps (their speakers are excellent) the amp seems good spec for the cash. The only downside I can see is that it doesn't seem to be 2ohm stable with bridged channels. No biggy, just limits your sub selection a little. Good skills on soundproofing by the way, heavily underrated, did you find it made a difference even at stock?
Ant
What one?
Just feels the speakers are letting it down a bit now so its time to change them..