why multiple runs of power/ground cables?
 

I am confused as to the logic behind this. I know alot of people are doing it, but why? especially with smaller cables(ie 4 and 2 gauge). the way I see it, four runs or 1 or 0 gauge is overkill. a battery can only produce so much electricity, and cables aren't 100 % efficiant, so if you add more cables, doesn't this lead to more loss of power? also if someone is running 4 runs of 4 gauge, wouldn't it make sense to run 2 runs of 2 gauge instead, or perhaps a single run of 0? I just don't see how running more cable is more efficiant than running less cable, especially in a 1 amp, 1 battery setup. if someone could clear this up for me it would be great.

u get more current faster from battery to amp

YULI STop Lying, ITs so all you spl guys' cars stay on the ground when the bass hits REALLY hard!! lol.. What Yuli says is right! lol

it's like 4 taps instead of one in your sink
sure it's technically less efficient (more loss then with a single tap) if the water pressure is there (or in this case hard amps) then the sink will fill faster then with one tap

it all depends on what your doing
I'd run multiple lruns for burping purposes, but my daily sq ride I'm not going to put more then one 0g run in

ILL ADD A QUESTION TO THIS ONE ... at what point do you know you need multiple runs ? would it make a big difference on my two kicker L-5's and my 1000 watt rms massive audio amp ?

u've put enough when you stop gaining spl.

hmm, I guess I need more wire :P ALOT :P

Yuli is right, more parallel runs reduces system resistance and opens more lane of traffic flow for electrons, not terribly efficient but fractions of db's matter

The ESR (or equivalent Series Resistance) of the battery is rpetty easy to find out... take the voltage, divide by the cranking amps (so say 12 volts / 800 amps = 0.015 ohms) a run of 1/0 might have a resistance of .02 ohms... which has cut your available current by over half, 2 runs makes the resistance of the wire .01 ohms, which is better, so multiple runs helps your batter work harder

sounds like a whole lot of fun i know a bit about audio but had no clue that would make a difference i guess im gonna have to get a better amp and battery and run more wires and see if i can upper my 140.7 lmao so sad:smilie_da

why multiple runs of power/ground cable?
 

This is interesting. So, if I understand this correctly, I can add one length of # 4 wire to my PDX 1.1000 (currently have one # 4) to upgrade instead of using one run of a heavier guage. I assume I would just add an appropriate fuse in the new run. Is this correct?

Yes.....depending how many inputs the amp has you may need to do something to merge the extra cables together but that's about it.....:thumbsup:

Multiple cable runs
 

Thanks Big Red Guy. I wasn't even thinking about squishing all that wire to fit the socket, when I posted LOL. I think I can fabricate an adapter though.

remember if you built correctly (with over sized wire compared to your power needs) the extra runs advantage is negligible, but if you need more power from your front end (or the battery has more to give you) this IS an inexpensive upgrade... a second run of cable is cheaper than a battery. I would guess this would be an advantage when you are over 2k watts

Multiple wire runs
 

Yeah, I calculated less than 1/2 a volt loss in my single #4 run (theoretically) but I'm always interested in the opinions of more knowledgable people than myself, when it comes to safety margins etc. I'm probably OK then with a single run, since the PDX amps are pretty efficient.

# of runs used will really depend on the current draw of your amps...aswell as other things.

With your average single mono amp setup you probably wont gain a whole lot going over 2 runs total.

With a larger setup it would be dumb to think you can efficiently pull major current through one or two runs of 0 gauge wire.

Something to think about...this is the #1 street max 1-2 car (4 amps one battery) in the world for the last few years. 50 runs by my count
http://memimage.cardomain.net/member...24_17_full.jpg

what is in the back of that thing ? i see er on the door as in kicker !

Basically by running multiple runs of wire, what you are trying to do is make it like the battery is right beside the amp.

wouldn't it be easier to move the battery to the back of the vehicle, if so many runs are needed?

it has to be under the hood by the rules. that car has 4 amps. and no, its not kicker lol.

id like to see them run the wires without seeing them in the car

ohhh...what if the car has a trunk mounted battery from the factory...is it legal, or do they have to move it? BMW etc...

on the transmission hump, or if not there along the bottom of the door, or under the pass side floorboard carpet, not that hard o0

Finding places to run the wire is one of the advantages to using multiple runs of smaller cable.

For example, you may be able to hide 4 runs of 4ga more easily than one or two runs of 1/0, due to the narrower diameter and the ability to them flat as opposed to have a bigger hump under the carpet.

SPL people are officially insane btw.

stinger has that flatter style 0/1 - 0/1X3 wire. ( not flat flat, but not as tall as normal 0/1)

:D

1/0 wire is relly not that bad to work with if u know wtf u are doing.

i did 18 runs in my crx and u cant tell its there at all.

running wire under the vehicle is another option