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Old May 11th, 2009, 05:09 PM   #1
jeepjake
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Default Audio system on boat

So I am putting two subs in my boat, the only problem is here the only place I think would be safe to mount my amp is up front near the passenger foot area. I know its best to keep the ground wire as short as possible, Where do I ground an amp on a fiberglass boat? Thanks in advance
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Old May 13th, 2009, 04:55 PM   #2
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Come on, I want this ish to pound!!
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Old May 13th, 2009, 05:34 PM   #3
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run the ground back to the batt (something like 4 gauge wire) its your best bet with boats. on small boats (under 26' ) the only place they have for a ground is at the gauges. i just keep say dont mess with that.

Last edited by peppy; May 13th, 2009 at 05:37 PM. Reason: more info
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Old May 13th, 2009, 05:47 PM   #4
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yeah essentially you only have two options, the ground block for the guages, which runs to the battery, or running the ground to the battery
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Old May 13th, 2009, 09:43 PM   #5
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Im running amps and subs in mine,
I am not using a 4 gage wire as my ground, the power runs aprox 10 feet to the amps, which they (amps) under the gally sink...the subs are located in the passenger section next to the passenger and drivers bolister seat

The ground is run back to the battery,as well as the constant positive, their is no radio noise or loss of power when the subs hit hard..I wouldnt go to the neg side under the dash....if you need anymore info on this feel free to pm me, Ive done many marine systems
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Old May 13th, 2009, 09:54 PM   #6
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Just use the same gauge ground as you do positive cable.
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Old May 13th, 2009, 11:19 PM   #7
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So you guys are saying I am fine using even a 18ft ground wire? As long as it is grounded to the battery? If the 4ga ground and 4ga power wire run along the same side of the boat will I have a problem?
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Old May 14th, 2009, 04:16 PM   #8
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Quote:
Originally Posted by jeepjake View Post
So you guys are saying I am fine using even a 18ft ground wire? As long as it is grounded to the battery? If the 4ga ground and 4ga power wire run along the same side of the boat will I have a problem?

you should have no problem. i have installed thousnads of amps, radio and speakers.Geat it done and make it slam!


I run nothing less then 4 gauge wire, 6 or 8 would be fine but that all on what you are running.
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Old May 16th, 2009, 02:13 AM   #9
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I thought they made something that you could mount to any material and use it as a ground? I could have sworn a friend in hs had one in his car, but maybe it just grounded to the car.
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Old May 17th, 2009, 08:14 PM   #10
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I thought they made something that you could mount to any material and use it as a ground? I could have sworn a friend in hs had one in his car, but maybe it just grounded to the car.
it was grounded to the car which is grounded to the batt because is metal and not fiberglass like a boat.
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Old May 18th, 2009, 12:10 AM   #11
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thats what i figured but i wasnt positive
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