Verified answer

heres what you want to get a really good system

1.A head unit with 3 amp outputs (front,rear,and subwoofer)

2.2 Pairs of component speakers

3.a 4-channel amp

4.some subwoofers

5.an amp for the subwoofers

6.amp installation kits.

Here we go

1. A car deck(CD PLAYER)

2. Car speakers(1 in each front door and a 6x9 in the back where your speakers are x2)

3. Two 12" subwoofer(10" or 12" I prefer 12")

3. An mono amp that can run both of thw subwoofers alone( Find subs then ask again on a question for amps)

4. A 4-channel amplifier for your speakers.

5. A high output alternator so your car lights dont dim and it is driveable.

6. Maybe a deep cycle battery.

Mono amps are better for subwoofers.

Channeled amps are better for speakers.

You will need seperate amps if you want better sound.

This is going to cost you lots though don't get me wrong.