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Here is what I did on my 97 STS Cadillac.

NEW Sony explode everything except the baby bazooka sub.

Head unit 180.00. Bluetooth usb etc..

500 watt amp, 4 channel. 225.00

Door speakers dual cone 120.00

Deck speakers triaxel 6x9 125.00

Big ( 3/8) power wire going from the battery to the trunk, with a big fuse.

Good size braided speaker wires that all reached the trunk.

3 coax braided wires that reached the trunk from the head unit. ALSO don't for get to run a small signal wire to the trunk from the deck for the amp signal. L R front- L R rear and sub out. (I took out the front seat and the back seat and ran everything under the carpet)

Get a good ground fore the amp, in the floor of the trunk. (I drilled a hole and used some sand paper)

It was about 600 bucks and 6 hours work.

I have a 1 farad capacitor ready to go in, but so far there is no dimming of the headlights or charging problems.

Make sure you have very high quality tweeters and that they are separately located from the main side-door speakers. They usually go on the dashboard. You'll also want to listen to them carefully in the store first to make sure they aren't the the ones that can't get the "S" sound right and make whistling sounds instead.

The price of the amp is probably what's going to hurt the most, but a high quality one will help the sound because weak amps that need to be near full power all the time make the sound garbled.

As for the head unit, make sure it can handle MP3/ipod input since if you just leave CDs all over your car they'll get scratched.

depends on what your really looking for. if you want a good sound full range system i would reccomend the following: Headunit

One 12'' or 10' subwoofer - For a nice bass tone for those low frequencies but not overly bassy.

replace stock speakers with correct size ( for example 6x9 every car has differant sizes so you will want to find out the sizes for your particular make. this will be your middle range frequencies )

Tweeters- High frequencies

and last but not least your amps. I would reccomend a class D mono block for the sub(s) and a seperate 2 or 4 channel amp.

if you would like a system with lots of bass i would definetly reccomend two 12's" or even 2 15"s (strongly reccomend more popular brands as their specs generally match where as lower end car audio brands can handle far less power than what they may claim. good luck

Depends how far you want to go with it and how much you are willing to fork out! A simple sytem will consist of one sub, probs 10", powered by a mono amp which will need a power cable, ground cable, remote cable and speaker cable. two co-axial speakers preferably with two crossovers off those leading to two tweeters run from a head unit. Then you can build off that adding more component speakers, an amp to run the component speakers rather than running them off the head unit, bigger sub or two subs, its never really complete!

i wouldnt pass jbl yet mtx is sweet and so is rockford and pioneer audio gadget get an amp and one 15 more desirable then likly you'll have more desirable bass from one 15 then 2 10s yet amp wiring harness rockford componet audio gadget an a rockford 10 for in the back of your seat and then a magnificent 15 with an amp wou'll spend like $three hundred-$500 on-line