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Old 09-16-2006, 01:56 AM   #1
sikproteen
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How many farad?

The installation
1 JBL P1222 12" Subwoofer - 400W rms - 1600W peak
1 JBL Power Series BPx 1100.1 amplifier - 1300W peak

The car battery is 70amps

I bought a Audiopipe capacitor CAP-100 - 1farad 20V 24V surge

Is this enough??
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Old 09-16-2006, 04:50 PM   #2
pocko5000
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capacitors are a hoax, they do nothing for you. your shouldn't even need one, your sub isn't using that many watts. your battery should be fine.
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Old 09-16-2006, 06:54 PM   #3
sikproteen
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Alternator screeches

Whenever I crank up the sound the alternator makes this screeching noise.
Doesn't that mean that the battery power is being sucked up fast and the alternator is trying to charge the battery?

Then what EXACTLY is the capacitor its purpose?
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Old 09-16-2006, 09:00 PM   #4
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Quote:
Originally Posted by pocko5000
capacitors are a hoax, they do nothing for you. your shouldn't even need one, your sub isn't using that many watts. your battery should be fine.

Well, there's a reason they were made.

For car audio, capacitors are put in parallel with the battery to smooth out the current (that may be fluctuated) produced by the battery. So, your audio devices get smoother current. Also, they provide enegy during times of peak loads; they act as a power reservoir, so to say.

I don't know how much capacitance you need for your car, but you can try and check it with the car audio shops. Usually, it's either 1 or 2 Farad.

Last edited by Pete_S : 09-16-2006 at 09:07 PM.
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Old 09-17-2006, 01:10 PM   #5
sikproteen
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Well i tested it last night and the power gets as low as 11.44V stable with the capacitor connected now.
But when i dont crank up the sound the capacitor shows 14.35V.
I guess now i just need to buy new belts for the alternator.
I heard SUN is a very good brand.
Are ther any others?

What could i do to get more power to my amp?
I know for sure i'm gonna make all wires as short as possible and instead of using 4gauge wire i'm gonna us 2gauge wires.
Would dat be a good idea by the way.
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Old 09-17-2006, 11:16 PM   #6
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i do not know what the screeching noise your alternator is making, it may just be bad. but again i am telling you that the capacitor does little if anything. as far as i know you only have one subwoofer in your car, that is sucking 400 watts rms, and the wiring you have in your car is good for it. 4 gauge wire that is less then 20 feet can handle around 1400 watts, that is 1000 more then your amp can put out. your wiring is fine! and if your are worried about voltage drop or dimming then first try doing something that is called the big three.
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Old 09-18-2006, 01:58 AM   #7
sikproteen
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ok
but i'll check by replacing the belts of the alternator and then unplug the capacitor.
I'll see what happens.
Thanks!
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Old 09-20-2006, 02:43 AM   #8
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do you even know what the big 3 is?
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Old 09-22-2006, 03:10 AM   #9
sikproteen
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WOW wat is dat
"the big 3"

gees dude unless its some weird invention u just came up with then i dont think so that i would know what "the big 3" IS
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Old 09-22-2006, 03:14 AM   #10
sikproteen
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also i dont know if you're aware of this but i dont play music on volume 3

i actually play it loud
the volume does go higher
the amplifier can also be adjusted
did U KNOW THAT
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Old 09-22-2006, 03:19 AM   #11
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Quote:
Originally Posted by sikproteen
WOW wat is dat
"the big 3"

gees dude unless its some weird invention u just came up with then i dont think so that i would know what "the big 3" IS
Quote:
Originally Posted by sikproteen
also i dont know if you're aware of this but i dont play music on volume 3

i actually play it loud
the volume does go higher
the amplifier can also be adjusted
did U KNOW THAT
Stop now while you're ahead. Your ignorance is only being amplified by your unwillingness to use proper English. This is not a chat room, this is not a text message, using words like "wat" and "dat" do not make you look smart. While the term "the big 3" is somewhat odd, the concept is absolutely sound. I strongly suggest you pull your head out of your ass and make an honest attempt at learning.
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Old 09-22-2006, 04:33 AM   #12
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ahh, go easy on him.
OK, the "Big 3" is the wirering from the alternator to the battery and grounds.
Basically you upgrade the wires to a larger size, thus lowering the overall resistance of your power supply, allowing more of the power the alt is producing to accually be used or stored by the battery. Its fairly simple to do and the only cost is that of the wire itself, unless you dont know what's going on under the hood and you skrew things up...

As for the question about farads, 1farad will usually power up to 1000Watts, but the caps dont realy help enough to make it cost worthy. Capacitors are nice for monitoring (and sometimes boosting) the voltage going to the amp(s).
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Old 09-22-2006, 06:18 PM   #13
sikproteen
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Boohoo.........
Sorry Mr. Grammar.
What are you going to do about it, fail me for my English course?

What is this better?
Just because you have some stuck-up live and don't get laid doesn't everybody else is supposed to have your lifestyle. You don't have a social, do you?
Sticking feathers up your butt doesn't make you a chicken.

Just because I used "volume 3" as an example doesn't mean that I was referring to "the big 3".

Everybody else stayed on the topic; apparently you have to nag like a little girl.
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Old 09-22-2006, 06:24 PM   #14
sikproteen
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Well that is exactly what i was going to do.
I was going to use 0-gauge wires for the installation and a 4 farad capacitor, because i'm going to buy two of the JBL 1222 sub and one of the JBL BPx2200.1 amp.
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Old 09-22-2006, 07:26 PM   #15
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...sigh
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