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Silver Member Username: Icecreamman5687Post Number: 125 Registered: May-06 | does anyone have the formula for finding what size alternator u should run whit the size amp u have... i have a hifonics bxi1606d.. |
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Gold Member Username: CtmikeCt. Post Number: 3269 Registered: Feb-06 | what size alt. do you have now and do you have any other amps? http://wickedcases.com/caraudio/charging.html |
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Silver Member Username: Sinful_systems70Post Number: 268 Registered: Nov-06 | I suggest 250A because you still need the extra amps for the factory equipment. JMO |
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Bronze Member Username: WhitewidowIL Post Number: 26 Registered: Oct-06 | Try taking a look at some local shops in your area. My buddy owns an auto shop and upgrades any alt to 160amp for a very minimal amount or can build bigger sizes for fairly cheap. So just a suggestion check out some local stuff and see if you can't just get an upgrade for much less. |
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Gold Member Username: JohnfiacIL Afghanistan,... Post Number: 1311 Registered: Mar-06 | Just my opionion.... DONT EVER buy from a Audio Dealer in a local shop, without first pricing around. The audioshops by me, the only one i could find that had bigger alt. was Music in Motion.. and they wanted 1100$ for it, but thats installed to...for no charge....they said....LMAO and thats only a 200A i can get a 300A for 450$ |
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Silver Member Username: Trey4sportsPost Number: 404 Registered: Sep-06 | yes i have an equation. if its a class D amp then it is (wattage X 1.15) / volts = AMPS needed for example if your system is 1600 watts and 12 volts it would be 1840/12= 153 amps |
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Silver Member Username: Sinful_systems70Post Number: 339 Registered: Nov-06 | Like I suggested 250amp because remember that your vehicle came with 90 to 100 amp for factory equipment and that 153a is only what the amp needs so you still need 60 to 110 amps extra depending on the extra equipment you have or might add. Plus this leaves room for upgrades. Hope that helps. |
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Gold Member Username: Nyyfan13Fi SSD USA Post Number: 3444 Registered: Jul-06 | just get the biggest you can find...wont have to upgrade later down the road |
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Gold Member Username: AdddisorderWest palm, Florida Post Number: 3133 Registered: Jan-06 | and troy your a little off there. a class D amp is not 85% efficiant its 80 so you mulitply by 1.2 |
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Silver Member Username: Sinful_systems70Post Number: 341 Registered: Nov-06 | I agree with Yanks fan but if you are on a budget than I would go no lower than 250a. I also agree with Mat Dope. |
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Silver Member Username: Sinful_systems70Post Number: 342 Registered: Nov-06 | I agree with Yanks Fan but if you are on a budget than I would go no lower than 250amp. I also agree with Mat Dope. |
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Silver Member Username: Sinful_systems70Post Number: 343 Registered: Nov-06 | Sorry for the duplicate. |
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Silver Member Username: Trey4sportsPost Number: 410 Registered: Sep-06 | depends on what amp mat, my P3000.1 claims 85% effiency, so i just use it as a benchmark for class D |
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Gold Member Username: AdddisorderWest palm, Florida Post Number: 3149 Registered: Jan-06 | hm thats weird troy, iv heard those amps are pretty power hungry but i guess efficant too. but the standard for class D amps is 80% really that 5% doesnt make much difference but just saying... |
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Silver Member Username: Trey4sportsPost Number: 414 Registered: Sep-06 | once i do the install i will be sure to tell you how it performs, but i just went off of massive's claims. well see |
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Gold Member Username: N2audioLawrence, Ks USA Post Number: 1197 Registered: Mar-04 | "for example if your system is 1600 watts and 12 volts it would be 1840/12= 153 amps" This may be true for full volume test tones, but I don't think there are many of us that have listening habits quite so extreme. Even bass-heavy music at full volume will require about 1/3 test tone power. So realistically - rms power for that amp, at full volume playing music is going to be around 50A. It's this principle (crest factor) that explains why thousands of people can (and do) run 1000w+ systems in their civics and corollas for years and never have an electrical system problem. I'm all for beefing up an electrical system when it's needed, but 250A for an efficient 1500w amp is way overkill IMO. (assuming an average car with average stock electronics) -- If it were me -- I'd look for something around 150A and expect it to be enough for the HF and a good sized a/b to run the front stage. However, I don't have very high demand listening habits - if you do, a 200A alt might be worth the extra $. |