alternator power wire - Page 2 - JeepForum.com
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post #16 of 24 Old 07-07-2013, 02:57 PM Thread Starter
davidtownsend
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A capacitor for my sound system. Doesn't that act like a second small battery closer to my amps so they draw power from that one instead of my main battery? Then the alt will fill it back up? If it is a bad idea then I won't do it. But no one had told me about them.


1994 Jeep Grand Cherokee 5.2L Limited
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post #17 of 24 Old 07-07-2013, 03:17 PM
Oldfrog
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A capacitor releases it's charge all at once...unless it's set up with a resistor, to slowly bleed it off. ( called a time constant and we dont need to get into the ins and outs of that here...or we'll be all day)

A capacitor is NOT a substitute for a battery. I think what you need is a larger battery which will hold a charge longer under load. Maybe a larger alternator too.

One of the things you can do is to increase the wire size going TO the audio AMP, thus reducing loss. ( to a point)

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post #18 of 24 Old 07-07-2013, 03:23 PM
Oldfrog
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A little sidebar for grins:

While in high voltage lab classes ( RF transmitters), we'd charge an electrolytic capacitor and toss it to an unsuspecting classmate...who would naturally catch it with his hand and get the crap shocked out of him. It's been going on for decades and will continue to do so, I suspect. The point is, after it discharges all at once....it's dead until you recharge it.

2007 5.7 Hemi, Ltd. QD II -
1997 ZJ, 4,0 select trac, Up country, track lok.
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post #19 of 24 Old 07-07-2013, 03:34 PM Thread Starter
davidtownsend
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I have ordered 0 gauge wire to a distribution block then 4 gauge wire from the block to the amps. In the future i will Gerry a 136 alternator. I have a duralast gold battery in right now. I forget the specs on it. Is our a good battery? So a capacitor like this isn't a good idea?

http://www.sonicelectronix.com/item_...oss-CAP4C.html

That sorry is funny though!

1994 Jeep Grand Cherokee 5.2L Limited
2006 Jeep Grand Cherokee Overland 5.7L Hemi
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post #20 of 24 Old 07-07-2013, 06:17 PM
Oldfrog
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Ahh...for powered subs and a huge amp. I thought you just wanted your audio system to run longer by battery alone. duh... You need to speak with someone who installs them for a living. ( because I hate them)

You're still taxing the system and you need to start with a higher output source. ( alternator)...and work from there.

One more bit of advice. Dont pull up next to me and turn it up. I WILL draw my 45 down on you... ( just kidding...it's against the law here to make that much noise with a car audio system ...thankfully..)

Now if you were talking guitar amps....that's a different story..

2007 5.7 Hemi, Ltd. QD II -
1997 ZJ, 4,0 select trac, Up country, track lok.
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post #21 of 24 Old 07-07-2013, 06:58 PM
David97
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Capacitors like those are a waste of money. Your better off just getting a better starting battery, preferably a AGM, and doing the big 3 upgrade.

What amp are you using? Other accessories?
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post #22 of 24 Old 07-07-2013, 09:00 PM Thread Starter
davidtownsend
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I will definitely save up for a bigger battery and alternator.

1994 Jeep Grand Cherokee 5.2L Limited
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post #23 of 24 Old 07-07-2013, 10:24 PM
ZeeJay1997
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Quote:
Originally Posted by Oldfrog View Post
Dont pull up next to me and turn it up.

Those high Db thumpers get me at stop lights. I always think the ZJ is coming apart.
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post #24 of 24 Old 07-08-2013, 12:48 PM
Oldfrog
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I played guitar in a recording studio for a living for 3 years. I was also on the road with a band 3 days a week during that time, playing bass through an 18" Cerwin Vega spkr in a folded horn cabinet. ( much louder than 4- 15" speakers)

People dont understand that the wavelength of a bass note is long......so it doesnt "seem" as loud when you are close to the speakers....yet it kills the ears of the guy who's 75 feet back away from the stage. The trouble with that is the bass player himself is also KILLING his own ears, by being close to it, yet he doesnt hear it. I still play from time to time with some old studio musician friends and I use a very small guitar amp, mic it and we run it through the PA system so we dont kill our own ears.

2007 5.7 Hemi, Ltd. QD II -
1997 ZJ, 4,0 select trac, Up country, track lok.
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