Hey guys,

Now i don't profess to be an expert on audio but i do know bit.

Now ,in a few weeks time i am pulling my dash out,front qtr panels and the whole front main dash loom and engine bay loom to put in climate control.

I am replacing it with a KJ GTV loom ,so all the extra factory wiring is there for the tweeters and mids etc.

lm running a set of fusion splits and factory dash speakers up front ,powered by a Pioneer H/U.

The rear speakers have been switched off at the h/u and the sub is powered by a 350 Kenwood amp

So ,with the extra bits and pieces that i have gotten from the wreckers and the wreck that i bought ,i have enough four gauge to re-wire it from the front to back and some more.

Along with four sets of rca leads and enough big arse speaker cable to re-wire the lot.

Now here are the question.

The deck supports rca out for the fronts and subs ,all good there.

So ,do i run two two channel amps or a single four channel. ?

I already have two two channels and a four channel ,so i dont need to get anything else.

Since the dash is out and i have to replace the front door looms as well ,is it worth it to bypass the factory wire and install the good speaker wire straight from the amps ?

Im figuring that since the door looms are out ,it will be easier to run the bigger cable through.

In the doors atm i have a set of splits wired up and have installed the dash mounted mids in line with the existing wiring...

how should i wire up the dash ones now with the better cable,just splice into it before it goes into the doors and the crossover...??

Any tips /advise /ideas will be greater appreciated.

Thanks

Michael

Id suggest if you feel up to rewiring the whole lot do it. Using 16/14 gauge speaker wire will ensure you have plenty of room to move in the future if you decide to upgrade to a larger system. With the dash out you can really utilize the "do it once, do it right" technique.

Since my dash it currently out im fixing up some dodgey alarm wiring and have been looking at how easy it actually is to run wires lol.

Id suggest if you feel up to rewiring the whole lot do it. Using 16/14 gauge speaker wire ??

like this stuff ??

http://i184.photobucket.com/albums/x112/micpea/IMAG0612.jpg

http://i184.photobucket.com/albums/x112/micpea/IMAG0613.jpg

With your 4ch amp, is it bridgable? By bridging your front splits, you will have more power/sound through the front splits as this is where most music will be heard.
What sub are you using? You could use your 2ch amp and bridge the sub off that for that all important bass, leave the rear speakers not connected at all, or have them running off the deck for a bit of rear fill.
The stock wiring is fine for a decent setup, but, if you want to upgrade having the larger gauge wring will help for any future upgrades as the upgraded wiring is already there cutting down heaps of time.

Bingo.

Second Bingo....


Holy Mother of Magna's, what a can of Ohms you've opened up....

Some of this may apply to you, may not.. But it should help...( someone????)

Firstly, not sure how the (your) dash speakers are wired, but if they are off the same feed as the splits.. you could (most probably ) shorten the life of the speakers or Xovers or both....
If they are off a different amplified channel. its still not Ideal.
Cross overs are designed to cut n slope Frequencies at certain Ohms/resistance, if you modify the Ohms and the cut offs and Slopes change, usually allowing tweets to go down to 1.6 Khz, away from the normal 3.2 (depending what speakers you have) or raise it, which the tweets will handle but the mid will have to play higher... Either way, you're not getting the value out of them you paid for....This includes removing speakers from a crossover two/three way kit.
I cant remenber how it math works, but someone might help you there, I wanna get back to my movie....

I saw this problem recently, where a tweet was replaced with another tweeter @ 4 Ohms, just cause the systems impedance @ the crossover was four ohms, doesnt mean the original tweeter was 4 Ohms.. Depends on the crossover and the system design...
Many Tweeters are not 4 Ohms, 2,3,6 and 8 ohm tweets are common..

As for wiring, the magna door wiring, which i guessed to about 16 Ga, will easily handle 100Watts @ 4 ohms over a 5 meter run, losing about a 1/4 of a Db, not noticable.
Where the problem lies is in the joins, the less joins the better, allowing for good flow...Changing from copper to solder ( or whatever join you use) can lead signal degradation, while it's probably only noticable on better systems. You can probably do what ever you choose.
I'd run new cabling, the OEM wires only run to the center dash, not where an Amp will be located... It also allow the OEM wiring to remain intact if you ever return to stock... Change the speakers and pull your wire out... Re-use...
While i know a bit about speaker cable Tech, I wont get into it, yes I fitted some serious shit, but a trip to Jaycar will nett you some decent stuff for a good price...
Use the rear speaker wire for the rears id they run of the H/Unit...

There is a bad thing having a doing a lot to perfect a system, all the music files have to be close to perfect, MP3's can sound so bad, even unlistenable, Middle of the road stuff is very forgiving. And plays low bit-rate content (FM -MP3 - Ipood etc) very well without being fatiguing....

There is handy wiring calculator I posted up in the DIY section, if you want to get fanatical, Here (http://www.aussiemagna.com/forums/showthread.php?t=52841&p=1496325&viewfull=1#post1496325)

And just a little useless bit of trivia, If the cable says 99.9% oxygen free copper, that does not mean that you getting almost 100% copper, that stuff most people pass on due to its higher price...

I'm still using the stock wiring for my splits, goes fine, but plan on upgrading to some 14 gauge cable and rewire my whole system, this may happen when I upgrade my HU later in the year, along with everything else. Starting fresh again.
And I might go the route of the Maggie 3.5 and strip the car of it's interior for the re wiring process.

Excuse me as im typing between ripping my interior out, but I wouldn't say the current speaker wire is 16gauge, id hazard a quess around 20gauge if lucky. Well atleast for mine that was the case.

I personally believe if you have the dash out just run some new wiring, I wouldn't even feel comfortable running 50wrms through the stock wiring.

Hey guys,
So ,do i run two two channel amps or a single four channel. ?
Any tips /advise /ideas will be greater appreciated.


IMO keep it simple. If your 4 channel is good quality and puts out sufficient power for the splits & (when bridged) the sub, surely much better option to use the 4 channel. I don't see the point in wiring in an extra amp when you don't need to. Ultimately I think the power demands of your system should be the determining factor re selection of amps. Personally, I'd even be tempted to go for a really nice 4/5 channel amp to run the whole system than having multiple amps set up... something like this would do the job nicely, lol (better see your bank manager before purchasing):
http://www.ryda.com.au/JL-Audio-HD900-5-HD-5-Channel-Amplifier-p/hd9005.htm