Big three vs Big two

[SpeakerBoy 64]

Should I still bother with a frame ground if all my amps have direct positive and negative from the battery?

My sub amp current has direct runs to the battery of 1/0, which are both less than ten feet.

Edited July 10, 2015 by SpeakerBoy

[jcarter1885 995]

If wire is available it wouldn't hurt, can never have too many grounds unless they are bad grounds.

[ssh 924]

Nope, but it doesn't make much sense running a cable from the battery neg to the amp either.

[frogcase2002 393]

Nope, but it doesn't make much sense running a cable from the battery neg to the amp either.

I thought it was better to have neg and pos runs from front to back

[SpeakerBoy 64]

Nope, but it doesn't make much sense running a cable from the battery neg to the amp either.

I thought it was better to have neg and pos runs from front to back

Same. I have plenty of room for runs anyway.

[SpeakerBoy 64]

If wire is available it wouldn't hurt, can never have too many grounds unless they are bad grounds.

I'm a foot and a half short lol.

[Randal Johnson 544]

Grounds should be short as possible.

[ssh 924]

 

 

Nope, but it doesn't make much sense running a cable from the battery neg to the amp either.

I thought it was better to have neg and pos runs from front to back

Same. I have plenty of room for runs anyway.

 

 

It's just a waste of wire as long as all your grounds from battery and alternator to frame are good.

[garychurch84 127]

Nope, but it doesn't make much sense running a cable from the battery neg to the amp either.

I thought it was better to have neg and pos runs from front to back

in unibodied cars it helps,but I would still want my amp ground as short as possible

[mikel7829 90]

I like mine short as well,with the very least resistance possible.

[bassahaulic 155]

I have as many grounds as possibly usually. 


Has never hurt..... 

[mikel7829 90]

I have as many grounds as possibly usually. 

Has never hurt..... 

Correct!! Just a return path for current,In my opinion the more the better.

[ssh 924]

I have as many grounds as possibly usually.

Has never hurt.....

Correct!! Just a return path for current,In my opinion the more the better.

All about law of diminishing returns.

[SpeakerBoy 64]

I can drill a hole for a frame ground and get more wire, but before I do, can someone help me understand how it'll be better than a direct line? I'm not understanding. I know grounds should be short, but if my ground is shorter than my power, what's the issue? I have less than ten feet of zero gauge feeding an orion XTR 5002 (soon to be a PPI900.4) bridged at two ohms, mounted under the passenger dash.

When I buy my royal excelene 4/0 I was also planning direct lines to the rear bank, then from the rear bank to the amps.

I'm using 4/0 for every amp, with reducers to fit the terminals.

Edited July 10, 2015 by SpeakerBoy

[mikel7829 90]

I can drill a hole for a frame ground and get more wire, but before I do, can someone help me understand how it'll be better than a direct line? I'm not understanding. I know grounds should be short, but if my ground is shorter than my power, what's the issue? I have less than ten feet of zero gauge feeding an orion XTR 5002 (soon to be a PPI900.4) bridged at two ohms, mounted under the passenger dash.

When I buy my royal excelene 4/0 I was also planning direct lines to the rear bank, then from the rear bank to the amps.

I'm using 4/0 for every amp, with reducers to fit the terminals.

Chassis ground..Or should really be considered a common... The big three will lower the resistance of the chassis..Return path flows better with low resistance as any electrical current..Other words keeps the resistance from changing "when you use you acessories"..This I have stressed on several forums

[SpeakerBoy 64]

I can drill a hole for a frame ground and get more wire, but before I do, can someone help me understand how it'll be better than a direct line? I'm not understanding. I know grounds should be short, but if my ground is shorter than my power, what's the issue? I have less than ten feet of zero gauge feeding an orion XTR 5002 (soon to be a PPI900.4) bridged at two ohms, mounted under the passenger dash.

When I buy my royal excelene 4/0 I was also planning direct lines to the rear bank, then from the rear bank to the amps.

I'm using 4/0 for every amp, with reducers to fit the terminals.

Chassis ground..Or should really be considered a common... The big three will lower the resistance of the chassis..Return path flows better with low resistance as any electrical current..Other words keeps the resistance from changing "when you use you acessories"..This I have stressed on several forums

Are you saying it helps to keep the entire vehicle as a common ground?

[frogcase2002 393]

If your grounded in the front then grounded in the back for your amp wouldnt that be the same as having neg runs going from front to back? I always ground in the rear and have neg runs but seems like it wouldnt be much different since the metal on the car would be just like having neg runs from front to back

[mikel7829 90]

 

 

I can drill a hole for a frame ground and get more wire, but before I do, can someone help me understand how it'll be better than a direct line? I'm not understanding. I know grounds should be short, but if my ground is shorter than my power, what's the issue? I have less than ten feet of zero gauge feeding an orion XTR 5002 (soon to be a PPI900.4) bridged at two ohms, mounted under the passenger dash.

When I buy my royal excelene 4/0 I was also planning direct lines to the rear bank, then from the rear bank to the amps.

I'm using 4/0 for every amp, with reducers to fit the terminals.

Chassis ground..Or should really be considered a common... The big three will lower the resistance of the chassis..Return path flows better with low resistance as any electrical current..Other words keeps the resistance from changing "when you use you acessories"..This I have stressed on several forums

Are you saying it helps to keep the entire vehicle as a common ground?

 

Actually that DC ground or "direct current" is not a ground it acts as a common...Direct current does not have a true "earth ground" That chassis that you do "the big three" on lowers the resistance of the ground "or in reality common" And that current that will return will be right back in the chassis....I might suggest you read up on direct current.

[garychurch84 127]

I say go for it!! You'll know if you need more grounds after its playing or not.

[garychurch84 127]

If your grounded in the front then grounded in the back for your amp wouldnt that be the same as having neg runs going from front to back? I always ground in the rear and have neg runs but seems like it wouldnt be much different since the metal on the car would be just like having neg runs from front to back

yes...somewhat

I need a ground ran from front to rear in my grand prix it doesn't like the ground in the rear no matter how I've done it.only thing I can think of is the unibody design where there is just a bunch of panels pinch/spot welded together to make up the car no solid frame anywhere. To me that's like taking a 100' extension cord and splice it every foot with wire nuts and saying that's a great cord.

I may be over thinking it a bit also!

Edited July 11, 2015 by garychurch84

[ohio45113 24]

Hell i have my ground ran to my tail light bolt. It's not even a real bolt either. Been that way for about a year now. No problems so far lol.

[SpeakerBoy 64]

I have rock solid voltage at full tilt with just my runs of wire, which is adding to my confusion lol

[garychurch84 127]

I have rock solid voltage at full tilt with just my runs of wire, which is adding to my confusion lol

I wouldn't worry much then

[pmureika 31]

 

I have rock solid voltage at full tilt with just my runs of wire, which is adding to my confusion lol

I wouldn't worry much then

 

That's what matters, leave it that way

[SpeakerBoy 64]

Thanks guys =]