how to read caps

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=28091
Printed Date: November 26, 2025 at 8:35 AM

Topic: how to read caps

Posted By: skylark
Subject: how to read caps
Date Posted: March 09, 2004 at 10:29 PM

my cap is reading 9.4 and 9.7 then my battery is dead again. i got it recharged yesterday so i know its probably an bad battery. so is the cap reading right or should i be concern. and what should the cap be reading on a regular basis. i have an 150 amp alt.........thanks

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goingcrazyonsound

Replies:

Posted By: superstreet786
Date Posted: March 09, 2004 at 10:30 PM

the cap should be around 12-14

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---- 1996 Chevy S10 ----
1 Lightning Audio S2.600.2 Amp
2 Lightning Audio 12" Subs
1 Lightning Audio 1 Farad Cap

Posted By: skylark
Date Posted: March 09, 2004 at 10:42 PM

thats what i thought so my battery is shot and there is probaly something wrong with my alt because i know my amp is sucking the juice out of the battery damn i have an audiobahn hct1500 amp running 4 12 inch kickers compvr but i have two jbl 1200 mono amps on the way i need to fix this problem soon because if my deck is shutting off each time i turn the volume up its not gonna work when i have the jbl amps my car is an 70 buick skylark with an oldsmobile 350 rocket. the alt is an 140 amp not 150 from jc whitney the chromed out one. so do i just have an cheap alt or i should just get an new battery?

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goingcrazyonsound

Posted By: cheagreen
Date Posted: March 10, 2004 at 1:38 AM

what is your systems watts RMS in total?

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Head Unit:Pioneer-Deh-1600
Fronts:Kicker 6x8 S57's
Front Amp:Coustic PowerLogic Amp460
Rear Fill:Stock 6x8's
Subs: 2 10" JL Audio W3's
Sub Amp: JBL bp600.1
Wiring: KnuKonceptz

Posted By: cheagreen
Date Posted: March 10, 2004 at 1:40 AM

I noticed you said "ampS" with an S. This might be your problem. There is an easy way to calculate just how much work your alt. and batt. are doing.

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Head Unit:Pioneer-Deh-1600
Fronts:Kicker 6x8 S57's
Front Amp:Coustic PowerLogic Amp460
Rear Fill:Stock 6x8's
Subs: 2 10" JL Audio W3's
Sub Amp: JBL bp600.1
Wiring: KnuKonceptz

Posted By: skylark
Date Posted: March 10, 2004 at 2:41 AM

right now i have an audiobahn 1500 hct amp and i should have 2 jbl 1200 watt amps by friday now i have 4 12 kicker compvr wired down to 1 ohm the amp is 1 ohm staple and is supposed to put out 2000 watts at one ohm i doubt that i dont know the rms but its not as loud as it should be

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goingcrazyonsound