Basic Build

Front Doors (x2)
1 Cadence QRS6K3 - $150

Rear Deck
2 Cadence CVL88MBX - $90

Truck
2 HDC415.D1 (wired to 1 Ohm) - $860
Crescendo BassClef BC5500D (trunk amp) - $1,100
Polk Audio PA D2000.2 (front door amp) - $150
Polk audio PA D1000.1 (rear deck amp) - $225
5 XS Power D3400 (1 in front) - $
2 Homemade Fuse Holder (single input, dual fuse)
2 Homemade Fuse Holder (single input, single fuse)
6 300a ANL Fuses - $24

Engine Bay
DC Power Engineering 370a Alternator - $900
Homemade Fuse Holder (single input, dual fuse)
4 300a ANL Fuses - $16

Wire
1 Positive runs of SHCA 2/0
1 Negative runs of SHCA 2/0
4 Positive SHCA 1/0 (amps)
4 Negative SHCA 1/0 (amps)
2 SHCA 1/0 to 4g reducer - $36

Rex Festiva Audio Build

Sub Amp - Crescendo Audio BC2000D - $500

Subwoofer - DC Audio M2 XL 18 - $550

    -8ga leads

    -1.4 Ohm

Woofer, Mid, & Tweeter Amp x3 - Crescendo Audio S550.2 - $660

Woofer x2 - GRS 10SSW-4  - $60

Mid x6 - GRS 5PF-8 - $30

Tweeter x4 - Pyramid TW44 - $40

My First Created Audio Build

So today I stumbled across my very first audio build and man have I come a long way. This is all it said:

3 Subs "Pioneer TS-W304R"
Inside a "Qpower QBASS123"
Powered by a "Hifonics HFi 1000.1D"
2 Mids "Rockford Fosgate PPS4-6"
Powered by a "Crunch PZX1000.2"
Door speakers powered by a "Autotek ATA1000.4"
Tweeters "Audiopipe ATQ-1250"
Split by "Soundstream PR02.XVR"
Power Wire Disturbed by "Xscorpion TB4444G"

Compared to what I do now, this is embarrassing. But it shows something important; progress. I know I'll get better at this, and I still am. If you're getting into the car audio game, just remember that it takes time and experience. You have to actually do some things to understand it (which I struggle with) and don't give up if something's not making sense. Lean, ask questions, read forums, and don't just take an answer, know why it is that way so you understand it better.