It helps relieve the stress on your Battery and Alternator.
Capacitors are generally used in high powered automotive sound applications. The capacitor acts as a storage for power. When peak parts of a music program are played and extra power is needed to drive the amplifier and speaker, the power is drawn from the capacitor. This puts less strain on the car's battery and alternator.
When a stereo system drains too much battery power, it is time to add a capacitor. The capacitor will not increase the battery, but instead will modulate it allowing for additional stereo usage.
a car
No. The capacitor is there to store the power so that the power isnt drained from the car at once. It helps reduce the strain placed on the vehicles electric system.
A car battery does not need a capacitor as it's regulating capacity (when in good condition) is well above any capacitor you can fit into your car.
sound system
yes
It depends on your car, your system, your budget and our personal preferences with regard to sound quality. First, talk to friends in the know. Then visit a car sound system shop that can tell you about the various options and what to expect. Most have set-ups that give you a good idea of the sound quality of each type.
The price of a car sound system ranges depending on the brand and quality of the product. On average speaker systems cost around $200 for an average, middle of the range system.
Positive post of capacitor is connected to the heavy amp cable. The ground terminal (or case) of the capacitor is connected to the car's ground or a ground wire that leads to the car's chassis. That's it.
After a repo you have the right to get your belongs out of the car and your tag off the car.
Sound systems and other after market products can be purchased and installed through the dealership where the car was purchased. There are also auto shops that specialize in sound system installation which can be found through local directories.