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Old 09-28-09, 09:27 PM   #1
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How much power can the biggest capacitors hold?

Can somebody tell me how much power the biggest capacitor can hold? How long does it take to recharge one? I have never used one and am curious. I will try searching as well, but if somebody is really up on this, I could use a quick answer.

Thanks,

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Old 09-28-09, 09:36 PM   #2
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I know that the Z-machine puts down around 50 terawatts. That's the most I've heard of. Sorry Gordon, couldn't help with the wise-assedness. I don't know anything of audio system technology.
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Old 09-29-09, 04:49 AM   #3
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I've heard that this one is good for 1.21 gigawatts.

Click the image to open in full size.

It takes a substantial external source to charge, though.
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Old 09-29-09, 11:21 AM   #4
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What are you using the cap for is the first Q... you can get many farad caps (like 20F) for memory storage applications at low voltage. For your stereo I know they have 3-4F caps though i've seen a few that are very poorly designed, like with aluminum coated plastic looking parts for the screw connections.
As for power, depends what you mean, current can be hundreds of amps for a very short time. Look up capacitance on wikipedia, they have an explanation of capacitance.
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Old 10-01-09, 11:41 AM   #5
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what the cap does is act as a fast recharging battery, when your bass hits, the power is stored close to the amp in the trunk, it will provide the power the amp needs to slam the bass through your speakers, and then it will recharge very rapidly while the bass is on a 'break'

what this does is like i said keeps more voltage near the amp instead of having to draw it all the way from the battery in the front of the car

yea the cap still draws it from the front however it does it at a controlled rate, much smoother and slower than the amp requires it to be drawn

it is made of two pieces of metal that are placed close together but not touching, they were made for A/C to D/C applications, a/c power can pass between the two pieces of metal but D/C power can not, there for it 'filters' out any D/C power noise (basically)
that of course is not the intent in car stereo.

the larger the cap the more power you will have readily available, I had a 10F cap in my car i was running a 1200W mono amp for my sub and a 1200W 4CH for the components, it still drained fairly quickly, it all depends on the volume you intend and the type of music, for rap music that hits hard but not very fast you won't need as much, but for like heavy metal with the drums and the bass guitar you will have more rapid bass and the cap will drain much faster.

caps are fairly cheap too, don't go to bestybuy or any walk in store, I paid 130 roughly for my 10F and that is the same price you will pay for a 1 yea ONE farad at the store if you walk in, I have seen up to 50 i think, maybe more, you can even hook up multiple caps together for more power, but if that is done wrong you will lower the power of the system

keep all this in mind but remember that a cap will not help a weak battery or weak alt, if your lights dim the cap may or may not help, If you drive an FC, get an FD alt and even rebuild it for more than 100A, get an optima yellow top as well, these things will help your car in many more ways than just the system...
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Old 10-02-09, 11:49 AM   #6
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Guys... I am working on (another) odd project. I am trying to build an inline ducted fan for the exhaust on my car and the fan will be driven by an electric motor. I am concerned about the power draw and thought maybe a cap would be helpful. (see last page of thread "New Exhaust Idea" in the na performance section)

Gordon
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Old 10-05-09, 01:08 PM   #7
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the only thing the cap will help with is the instant power draw that the fan creates when starting up, other than that it will offer little to no effect... and the cap must be as close to the fan as possible...
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Old 10-05-09, 01:08 PM
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