if i have a capacitor can i listen to music with my car off?

Answer 1

Yes, but you can listen to music if you turn your key to ACC on the ignition switch also without the car running.

Answer 2

A capacitor will not extend the length of time you can listen with the car off before draining the battery. Compared to a battery, the capacitor does not really hold that much energy. As soon as the vehicle engine is turned off, the capacitor voltage will drop to the battery level (probably within 1 second) and after that all the power comes directly from the battery.

Capacitors are good at keeping the voltage up during a very brief demand for extra power, but not for maintaining an extended high current draw.

Answer 3

alright first do not use an optima yellow top battery unless you have a high output alternator your factory charging system wil not keep that battery fully charged it is a deep cycle battery for boats and rvs. and because its a gel cell after a while of not being fully charged it will eventually die. a red top will work iit is made for cars. you would add a capacitor because it can charge and release energy instantly where a battery has to have a chemical reaction to produce energy. its only milliseconds but it makes a difference. you can put a switch in on the stereos ignition wire with a diode that blocks the power from going back into the vehicles electrical system and turning stuff on or just turn your key on. the headunit should tell the amps to turn on. also a 1 farad capacitor will only store a small amount of energy, enough to light a small light bulb for a minute or so if your amp(s) produce massive power youll probably need a bigger capacitor.

Answer 4

In theory, yes, however it will not have much of a positive effect considering it will take some time and a lot of power to put enough power into the capacitor to hold. And eventually depending on its size it will run out. I don't think any capacitor holds more than a few minutes from my very small experience with them.

Answer 5

No, you can not. The radio needs power from the battery. Pray tell, just where did you get this idea from that a capacitor would allow you to listen to music when the car was turned off?

Answer 6

Yes, if you could get it in the car (as it would have to be quite large) and wired it to feed both the back-up and acc switched circuits. It would be easier to just run a separate line from the battery (through a large toggle switch) to both power inputs. A better idea would be to just turn your ignition switch to the accessory mode and not start the car.
And for the benefit of our 8 year tech., a so called "super cap" is used quite often as a battery. Many electronic devices use 2 and even 4 Farad caps, instead of battery cells, for such things as memory back-up for processor chips.

Answer 7

Um, yeah, the capacitor should supply enough current to last maybe 3 seconds, then it will start draining your battery.

Answer 8

good answers but if you dont have a ho alt such as 180amp -250amp alt then you can put all the caps you want and they will still die! you must upgrade your alternator first that supplies the battery and cap.use a 180,200,250amp a good deep cycle battery ie deka,optima or stinger and a good cap depending on your wattage and you can run your sys for hrs if you want all day then do sep charge sys for your audio that means its own alt,battery and cap but remember that can be more costly than the first solution......good luck

Answer 9

For a very short time.

Answer 10

KaeZoo has in nailed.