Decaf Posted September 29, 2009 Report Share Posted September 29, 2009 (edited) ur tryin the create the path of least resistance from rear amps/batts to alternator ground.... so because of the way some frames are attatched/connected/welded using 1/0 negative runs can have less resistance than traveling thru a bunch of different metals to get to the engine block(the bolts that attach the alt to the engine block are the alts grounds iirc) this is why the big 3 helps... u add larger ground wire from bat - to engine block(alts closest ground) and engine block to chassis (this helps when u use rear chassis ground to create a shorter more efficient path to the alts ground) it should really be called the big 4... and include a ground from bat - to alt bolt on engine block whats so hard to understand about that? reduced resistance = raised voltage Edited September 29, 2009 by Decaf Quote Link to comment Share on other sites More sharing options...
t-money Posted September 29, 2009 Report Share Posted September 29, 2009 as long as you have a short ground from the amp to the frame or chassis i dont se a problem but i wouldnt run all the way back to the battery Quote 2002 ford focus hatch pioneer DEH-P8400bh infinity kappa 6.5 components front and rear XS Power D1200 Shuriken BT-100 audioque 120.4 2 15 inch audioque HDC3 D2 2 audioque 2200d big 3 mechman 220a alt with external regulator 479-418-3056 Link to comment Share on other sites More sharing options...
lanman31337 Posted September 29, 2009 Report Share Posted September 29, 2009 as long as you have a short ground from the amp to the frame or chassis i dont se a problem but i wouldnt run all the way back to the battery So on that, you're saying that my run of 3/0 and run of 1/0 grounds to the back batteries are useless? Quote 2 - Audiopipe AP30001Ds 1 - Lanzar Opti Scion 600.4 4 - Lanzar Optidrive 1232D's 1 - Lanzar Opti 5.1 1 - Lanzar Opti 6.1 1 - Lanzar Opti 6C midbass 1 - Alphasonic PCT6551 1 - Lanzar VX830 1 - JBL 22 band EQ 1 - Lanzar SDBT75NU 1 - AudioControl Epic160 Link to comment Share on other sites More sharing options...
Decaf Posted September 29, 2009 Report Share Posted September 29, 2009 So on that, you're saying that my run of 3/0 and run of 1/0 grounds to the back batteries are useless? meaure the amperage running thru them if its like 2a then yes, lol if its 100a+ then no Quote Link to comment Share on other sites More sharing options...
finkster Posted September 29, 2009 Author Report Share Posted September 29, 2009 (edited) whats so hard to understand about that? reduced resistance = raised voltage lol I understand how the process works Here is a picture of a frame rail on a ford truck. That doesnt look too spot welded up to me...I mean sure theres welds around, but the entire top/bottom is straight....no interference. I could ground to (for instance) the right frame rail and not hit a single weld the entire way. again, is an entire Beam of steel less resistant than the 1/0 return path. again, im only challenging the theory....I think it boils down to what has the least resistance. Edited September 29, 2009 by finkster Quote DAT 4125------>RE XXX comps active Eclipse cd7000 I serve drunks for a living Link to comment Share on other sites More sharing options...
lanman31337 Posted September 29, 2009 Report Share Posted September 29, 2009 Then you're going to want to take the resistance from where the piece of copper the amp mounts to, and then from the other tip where the cable going to the battery or alternator goes to. You'll find that there's more resistance in steel than there is copper. Quote 2 - Audiopipe AP30001Ds 1 - Lanzar Opti Scion 600.4 4 - Lanzar Optidrive 1232D's 1 - Lanzar Opti 5.1 1 - Lanzar Opti 6.1 1 - Lanzar Opti 6C midbass 1 - Alphasonic PCT6551 1 - Lanzar VX830 1 - JBL 22 band EQ 1 - Lanzar SDBT75NU 1 - AudioControl Epic160 Link to comment Share on other sites More sharing options...
ALPINE408 Posted September 29, 2009 Report Share Posted September 29, 2009 BEST PLACE TO GROUND BATT OR FRAME????? BOTH!!! yes run a wire to your batt then the frame!!!! ///Thread Quote Have you ever had your woofers blown? Link to comment Share on other sites More sharing options...
Decaf Posted September 29, 2009 Report Share Posted September 29, 2009 ^^bingo Quote Link to comment Share on other sites More sharing options...
lanman31337 Posted September 29, 2009 Report Share Posted September 29, 2009 Now this is something I want to question. Since electricity runs in the path of least resistance, why then have something that doesn't give the best continuity? Wouldn't that be a waste of a connection? This could also introduce the possibility of a ground loop as well since there's going to be different resistances. Quote 2 - Audiopipe AP30001Ds 1 - Lanzar Opti Scion 600.4 4 - Lanzar Optidrive 1232D's 1 - Lanzar Opti 5.1 1 - Lanzar Opti 6.1 1 - Lanzar Opti 6C midbass 1 - Alphasonic PCT6551 1 - Lanzar VX830 1 - JBL 22 band EQ 1 - Lanzar SDBT75NU 1 - AudioControl Epic160 Link to comment Share on other sites More sharing options...
Loudcav Posted September 29, 2009 Report Share Posted September 29, 2009 if you have an accual frame you might be better off grounding to it but a unibody once you get a good ammount of power the ground to the body is pretty sketchy at best since there are multiple welds and no real straight path for the power to follow Quote Link to comment Share on other sites More sharing options...
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