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Platinum's amp draw

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SuBXeRo

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Post Fri Feb 27, 2004 6:39 pm

ok i know ppl have done threads about this b4 but i want to know how many amps it draws, the dealer fixing my car says that my kit draws 17 amps im like this is bs. so hes upgrading my alternator for me for free b/c of all the brake probs, but yeah they said 17 amps, and that that was the cause of why my abs was failing lack of power to the abs. my next questions is how many does my damn AMP pull from my batt.
ADDICTED2ICELED

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Post Fri Feb 27, 2004 6:47 pm

what amp?
Mav

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Post Fri Feb 27, 2004 7:02 pm

hehe if your car stereo amp is ONLY pulling 17 amps, I'm shocked =P must be a low output amp.. there is a reason why the amps have a pair of 30 amp fuses or larger =P
9sdime9

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Post Fri Feb 27, 2004 8:21 pm

Mav wrote:
hehe if your car stereo amp is ONLY pulling 17 amps, I'm shocked =P must be a low output amp.. there is a reason why the amps have a pair of 30 amp fuses or larger =P



read his post again...he said the dealer said his UB KIT was pullin 17 amps.
SuBXeRo

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Post Fri Feb 27, 2004 10:05 pm

yeah i mean th way io look at it the lights hsould be the prob the amp should in my mind
Mav

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Post Sat Feb 28, 2004 1:08 am

your stock alternator should be able to handle 17 additional amps for one, and you aren't always driving with the UB kit on, so it's not really drawing anything aside from a few miliamps in standby mode if even that.

Your stereo amp on the other hand will draw much more than that. Look at how many people power 2 amps off of their stock alternator and their battery, and they don't have a problem with ABS.. sounds like **** to me.
pontiac4evr_14

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Post Sat Feb 28, 2004 8:28 am

Yea i really doubt it would draw that much current for the UB but the amp will draw alot of current but noting that would screw up your abs. My headlight flash like a SOB but ive never had problems
SuBXeRo

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Post Sat Feb 28, 2004 11:14 am

yeah well i calculated it it my amp draws about 4.5 amps so my neons are drawing more which should be 5 not 17 thats would be retarded doesnt make sense my default alternator put out 90 amps they upping to 120 so im hjappy so ima let them think it draws 17 amps so i get a free alternator whatever itll help power my new 4 ch amp for my speakers when the time comes plus ima get a cap eventually fo shizzo lol
Mav

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Post Sat Feb 28, 2004 11:22 am

what kind of amp do you have that's only 4.5 amps? Aside from maybe a stock amp, it should draw a whole lot more than that....
SuBXeRo

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Post Sat Feb 28, 2004 1:25 pm

jl e2150 i found a nice thing on crutchfield last night it explains to you how to figure out the appromimate amp draw for your amps. i only use 45 watts a channel for my subs.

this is an explanatiuon of how much your electrical system can handle more or less





What's the biggest amp I can hook up to my car's electrical system?

A: Your car's alternator ampere rating determines how powerful an amplifier you can install. Multiply the ampere rating by 40%, and you'll get a rough idea of how much reserve current capacity your car's system has. Next, you'll need to calculate the approximate current draw of the amplifier you're considering installing.

To calculate the current draw of an amplifier, multiply the number of channels by the RMS watts per channel (a 2 channel amp rated at 300 watts RMS per channel would be 600 watts). Double it to account for amplifier inefficiency (600 watts X 2 = 1200 watts), then divide by the average output Voltage of an alternator, 13.8 volts (1200 divided by 13.8 = 87 amps). Since the average music signal requires about 1/3rd of the average power in a test tone, divide by 3 (87 amps divided by 3 = 29 amps). The result is the amplifier's approximate average current draw.

A fast-and-nasty way to ballpark an amplifier's current draw is to divide the total fuse value of the amp by two. For amplifiers with multiple fuses, the rating of all fuses provided with the amp must be added together. This will likely produce a significantly higher estimate than using the proper formula. Although inaccurate, this will err on the side of safety.

Finally, compare the amplifier's approximate current draw to your vehicle's reserve current capacity to determine if the electrical system can support the amplifier.

If all those numbers are a bit much, here's a simpler way to think about it: an alternator capable of producing 65 amperes is usually adequate for systems up to 270 X 2 watts RMS. A compact car with a 35-amp alternator can accommodate around 150 X 2 watts of power, while a Sport Utility with a 145-amp alternator can handle a 600 X 2 watt system. A capacitor can help if your system is drawing a little too much power. Car audio competitors often replace their vehicle's alternators with heavy-duty upgrades to accommodate big power demands.
SuBXeRo

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Post Sun Feb 29, 2004 10:12 am

cotamotor said it may be combinign with other accessories on the line they tapped into, why they just dont run a new wire it beats me and they wont even listen to me, i asked them to run a new wire and they wouldnt. so when i get it back i am rewiring it
SuBXeRo

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Post Tue Mar 02, 2004 9:10 am

ok talked to pg 3-4 amps they said so to be safe 5
ADDICTED2ICELED

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Post Tue Mar 02, 2004 9:17 am

17 is waaaaaaay steep for a ub kit... and the hu doens't typically do more than 17. they only consist of an ic transistor chip to produce sound... so power is typically drawn @10 amps for a factory unit. even the pioneer have a ic chip to power...
SuBXeRo

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Post Tue Mar 02, 2004 9:24 am

yeah so infiniti is wrong IM right oy damn professionals, now i just gotta get me car back tomorrow and rewire
ADDICTED2ICELED

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Post Tue Mar 02, 2004 9:39 am

they are horrible electricians at dealers. they only know how to replace stock items.

they told me my 2 1ft tubes hooked into the fuse on the radio channel caused my headlight clips to fry becuase of the amount of current they were drawing... icon_evil.gif
Brandon

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Post Tue Mar 02, 2004 10:56 am

SG claims their's draws 9 amps... so what's this madness about the 10KV transformer being soooo much better? Are they gonna try and say that their transformer is also 50% more efficient?
Aken

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Post Tue Mar 02, 2004 11:26 am

Hahahahahahahaha! About time I get someone to side with me!
SuBXeRo

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Post Tue Mar 02, 2004 2:18 pm

well i talked to them at pg and they said at max 5 amps
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