capacitor and speaker hum

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=81334
Printed Date: May 15, 2025 at 10:05 PM

Topic: capacitor and speaker hum

Posted By: nicenasty
Subject: capacitor and speaker hum
Date Posted: August 07, 2006 at 9:00 PM

Should a digital capacitor(1 farad fosgate) read voltage even with vehicle off. Also It came with a little circuit board for charge and discharge, Should that be on the capacitor all the time or just to charge and discharge.

2nd question is when I turn my sub amp on there is a very faint hum even with volume turned all the way down. I am running 2 12" kicker comp vr 1 ohm into a memphis 500.1

Any help would be appreciated.

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alpine CDA 9830
memphis 500/1
kicker comp 12's
infinity ref. 6010CS
JL_AUDIO E-4300 for components

Replies:

Posted By: nicenasty
Date Posted: August 07, 2006 at 9:02 PM

capcitor is wired in line before dis.block

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alpine CDA 9830
memphis 500/1
kicker comp 12's
infinity ref. 6010CS
JL_AUDIO E-4300 for components

Posted By: killer sonata
Date Posted: August 07, 2006 at 9:08 PM

i used to have a digital 30 farad capacitor back when i used to think they actually did something. It turned off by itself after a set amount of time. or atleast thats what the directions said. sell the crap, i mean cap :) on ebay and upgrade your big three.

Posted By: jettagli03
Date Posted: August 07, 2006 at 11:12 PM

yeah i've put in a few caps in friends cars, they all are convinced they need it so i dont complain--just get paid to do it, and the digital ones usually still read the voltage for a good minute or so before they turn off

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