What size speakers will fit in my door?

What does a capacitor do?

 

I cant answer your first question, but im pretty sure a capacitor is basically like a second battery. It is designed to hold an electrical charge on its own, so when your car is turned off, the stereo gets its energy from the capacitor and not the car battery, thus saving you from having to jump your car. Some1 correct me if im wrong.
by the way, i had to build a little capacitor in H.S. for a project. We used the static on a TV screen to charge it. It was the equivalent of sticking a 9v battery to your tounge for about 1/1000 of a second. LOL. Just dont try that with a real capacitor, it would probably make your balls explode

 

The front and rear door speakers are 6.5 inches. the depth is about 1.75 inches. With almost all decent replacement speakers you will need to add spacers to reduce the installed depth. I used 3/4 inch MDF for my Boston Acoustic ProSeries.

The capacitor does act like a battery, but has a much faster charge and discharge rate. The cap would only power your system for about 1-10 seconds. It's main function is to remove voltage and current transients in the electircal system while the battery and charging system are used to maintain a constant power flow.

hth,

-- pierre

 

Yeah FVFFC is right...

Basically if you can imagine this...an analogy...a girl jumping up and down on a trampoline...where the trampoline at level is where your battery draw SHOULD be, and when she jumps you're looking at small power spikes, and when she lands, you're looking at DEEP power drops (depending on how heavy she is, aka how big your stereo amps are).

Capacitors are just two parallel conductive plates separated by a nonconductive layer, and by running current through it, it builds up + charge on one side and - charge on the other. Now your battery holds a lot of charge, but it doesn't spit it out very fast. So your capacitor acts as an electronic absorber. Every times your subs hit (normally this isn't as big of a deal with component sets) the amp draws an enormous amount of current...sometimes up to 120 amps, from the electrical system. The battery can't provide this and run everything else in your car, so you'll see your gauges go nuts, lights dim, etc etc etc. The cap will spit out this momentary draw and then be recharged by the battery, or more likely the alternator, which outputs much more power than the battery can absorb normally, and instead of being wasted the capacitor absorbs it. I have 6 Lightning Audio Digital Storm 1.5 Farad capacitors for my two 800a2 RF's and one 600a5...as well as my computer, wireless LAN, etc.

Hope that helped
Austin519