How to hookup a 2nd batt?
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Silver Member Username: Trey4sportsPost Number: 832 Registered: Sep-06 | im ready to wire a second battery so do i just keep the run from amp to front batt and do a run of + to + from the starting batt to the rear batt, and a run of - to - from front to rear batt? OR do i go from amp to rear batt and then wire from the rear batt to the front batt? help me out guys |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1161 Registered: Jul-06 | + to + and - to - Then connect the amp to the rear battery. BTW, both batteries have to be EXACTLY the same model to do that. |
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Silver Member Username: Trey4sportsPost Number: 833 Registered: Sep-06 | well the ones that i would be using are not so what do i do differently? |
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Gold Member Username: OglejustPost Number: 1304 Registered: Aug-06 | ^^^ no they dont! they just have to both be either gel cell, dry cell, or wet cell... dont mix and match |
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Silver Member Username: Trey4sportsPost Number: 834 Registered: Sep-06 | and i have the batt on the amp running to the front batt, how do i also connect the amp to the rear battery since there is only one slot for battery on my amp? |
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Silver Member Username: Trey4sportsPost Number: 837 Registered: Sep-06 | like i know i would wire +to+ and -to- on the front to rear batt but u then say to wire the amp to the rear batt and thats what i dont understand |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1162 Registered: Jul-06 | Justin, yes they do. And even then, it is not an ideal situation. Read: Scan from the latest issue of CA&E mag: http://www.putfile.com/pic.php?img=5112839 Trey, you connect the amp to the battery in the rear. You don't connect it to the front battery since the two batteries are connected. |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1163 Registered: Jul-06 | Trey:  |
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Silver Member Username: Trey4sportsPost Number: 838 Registered: Sep-06 | thanks man your a big help  |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1165 Registered: Jul-06 | No problem  And I hope justin reads that article before he tells someone else it's ok to run different batteries without an isolator.... |
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Silver Member Username: Trey4sportsPost Number: 839 Registered: Sep-06 | so for now since i have different batterys would i be better off to just swap out the starting battery? |
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Gold Member Username: Th3pwn3rPost Number:... Post Number: 1667 Registered: Jul-06 | I'm running my kinetiks and a standard batt with no isolator and no problem,thanks M.S. Lots of people do it so...I guess an isolator is not ALWAYS needed. |
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Silver Member Username: Trey4sportsPost Number: 840 Registered: Sep-06 | ok one last question. in the diagram, i see that it goes from rear batt + to front batt + but its unclear to me what to do with the -?? i thought you said i would go - to - just like the + to + ?? |
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Silver Member Username: Super_marioPost Number: 195 Registered: Mar-06 | CHASSIS GROUND. |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1166 Registered: Jul-06 | " so for now since i have different batteries would i be better off to just swap out the starting battery? " Yes " but its unclear to me what to do with the -?? " Just ground all negatives to the chassis. Rob, you don't have to believe me if you don't want to, but running different batteries together in parallel without an isolator will cause your batteries to slowly kill each other. I just posted a professionally published article that supports that, and there are others online. |
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Silver Member Username: Trey4sportsPost Number: 841 Registered: Sep-06 | i got it dude just went back to BCAE and understood. once again thanks, youve cleared up a ton for me |
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Gold Member Username: Th3pwn3rPost Number:... Post Number: 1668 Registered: Jul-06 | Well,I guess when my batts die in 10 years I'll just have to get some new ones I guess. |
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Silver Member Username: BasssquaredPost Number: 288 Registered: Nov-06 | so do you need a HO alternator to hook up a second battery to it? |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1167 Registered: Jul-06 | ^^^^^^ Only if the stock alt isn't able to keep the batteries charged, which is usually the case when running more than 1000 watts. |
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Silver Member Username: BasssquaredPost Number: 290 Registered: Nov-06 | so if i wanna run 1500 watts rms it would be better to get an HO alt then to add a second battery |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1168 Registered: Jul-06 | Yes. It doesn't matter how much battery capacity you have if your alt can't keep them charged. |
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Silver Member Username: BasssquaredPost Number: 291 Registered: Nov-06 | just some story but my local car adio shop is mostly kicker and memphis and there company truck i think a chevey trailblazer had 2 12" memphis mojos in this huge custom built box with i think two memphis 1000 watt amps one for each sub so thats 2000 watts rms and instead of getting an HO alternator or second battery they just ran 3 caps to each amp i heard caps where pointless can you explain why they might have done this and by the way they beat everyone at our towns anual car show |
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Gold Member Username: Th3pwn3rPost Number:... Post Number: 1670 Registered: Jul-06 | Because caps aren't pointless...and you don't need an alternator at all to compete.All you need is enough batteries to support current demands.The only time you may need an alt is when your batts begin to lose voltage.Even when they do a lot of guys hook their batts to a Charger and never use an alt at all.That's something M.S. left out.He seems to know everything though...so eh...A high output alternator is a good idea for a daily driver but for an all out COMP car you don't really need it.Just enough batteries and a nice charger and you're good to go. |
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Silver Member Username: BasssquaredPost Number: 293 Registered: Nov-06 | call me stupid but i thought the alt was what recharged your battery? are you talking about a seperate charger like the ones you use when your battery dies and you dont have jumper cables you just use the car charger? oh and would i be fine then with hooking up 3 caps to my amp instead of getting an HO alt? |
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Gold Member Username: Th3pwn3rPost Number:... Post Number: 1671 Registered: Jul-06 | ^I wouldn't hook up caps to support current demands but I would use more batteries in a non daily driver vehicle. |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1169 Registered: Jul-06 | I was talking about daily driving systems. Serious competition is totally different. And no there is NO substitute for an HO alt. In a D.D. vehicle that is. |
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Silver Member Username: BasssquaredPost Number: 295 Registered: Nov-06 | i ran 1200 watts rms well they were sopose to be 1200 watts rms at one ohm im not sure if audiopipe amps are over rated or not but the point is i used this amp pushing two 12" L7s for about 3 weeks and besides some slight dimming of my head lights there was nothing wrong so would just adding 300 more watts make a huge diff? and would getting a durabrand lifetime warranty alt be a bad idea? i know they would last long but i could just keep getting a new one because of the lifetime warranty |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1170 Registered: Jul-06 | Install the system, and play it full blast, while watching your voltage with a DMM. If it drops below 12 volts, you need an HO alt. That is really the only to tell for sure. Having an inadequate alternator will not only damage the alt but also the subs, since the amp would be clipping when the voltage drops. BTW, with most lifetime warranty parts, they will only replace it once. As I said before, There is NO substitute for an HO alt. |
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Silver Member Username: BasssquaredPost Number: 296 Registered: Nov-06 | ok thanks a lot M.S. i apreciate your help and patience |
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Silver Member Username: Trey4sportsPost Number: 842 Registered: Sep-06 | hey m.s. what voltage does clipping occur ?? like 11.9?? wat im really asking i guess is when im watching my volt-meter, when should i recognize that i need to turn it down because my volts are dropping too low ?? |
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Silver Member Username: JblanfordPost Number: 665 Registered: Oct-06 | i would say anything under 12v |
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Silver Member Username: Snarl2004Audioque 12 SD2.5s, Earthquake P... Post Number: 746 Registered: Dec-06 | wheres the best place to get a 200amp ho alt? cheap but still relaible...? |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1173 Registered: Jul-06 | Assuming your gain is set correctly and volume is turned all the way up: For an amp with an unregulated power supply, clipping will occur when the charging system voltage drops below the voltage at which the amp is rated. For example your amp is rated at say 13.8 volts and your voltage drops to 12.5 volts, it will clip. Or if your amp is rated at 12 volts and your voltage drops to 11.5 volts, same thing. As a side note, if your amp is rated at 14.4 volts, you can never get the rated power from it with the engine off, since most batteries are 12.5-13.5 volts. For an amp with a regulated power supply, the amp will never clip due to low voltage. It will simply turn off when the voltage drops below the operating range. |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1174 Registered: Jul-06 | Snarl, for good quality HO alternators: www.ohiogen.com OR http://stores.ebay.com/Iraggi-Alternator-and-Electronics |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1188 Registered: Jul-06 | bump this |
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Silver Member Username: Trey4sportsPost Number: 852 Registered: Sep-06 | so since my massive p3000.1 is rated at 14.4 its clipping even when im at rest ? (13.8) for my vehicle and how much damage will i do, because i typically turn down my system once i go below 12.0. so if my amp is 3k at 14.4 would i be ok running it down to 12 volts? |
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Gold Member Username: Nd4spd18Southeast PA Post Number: 1190 Registered: Jul-06 | Sure you can run it at 12 volts. It will only clip when you try to get more power out of it than it's capable of. You would have to get it benched if you wanted to know exactly how much it can do at 12 volts. What you can't do is turn the volume all the way up with it running at 12 volts, then it would clip, as you are trying to get 3000 watts from it, but it can't produce that much. |
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