Concerning the alternator- I have a 01 Xterra. Either 70-80 amps. The Quest they made that year was basically an identical alternator, just more powerful(120 amps). I picked one up on ebay used for 50$ shipped and I'll just slide it right in(obviously not that easy).
Ordered some 4 gauge to do the big 3. I'll supplement it with the current wiring. Not good under the hood so this will be a bitch.
Now here's the system-
Headunit- JVC KW-NX7000BT-
JVC KW-NX7000BT Navigation receiver at Crutchfield Signature
Front Speakers- Infinity Kappa 6.5's-
Infinity 60.9cs 6-1/2" 2-way Kappa Series Component Speakers
Rear Speakers- Alpine Type-R 6x9's-
Alpine SPR-69C (spr69c) - 6" x 9" Speakers - Sonic Electronix
Amp'ing the front/rear speakers- Pioneer GM-D9500F -
Pioneer GM-D9500F 4-channel car amplifier — 75 watts RMS x 4 at Crutchfield.com
Portable HD- The reason I got the JVC headunit was because it didnt have a max file size on USB media. Most have a 5-8gb max. This one doesnt have a max, but it does take about a minute to index all the songs. Worth it imo. Extremely tiny. Its about the size of my wallet. Right in the glove box. If I want to add music I pull it out and plug it into the computer. - [ame="http://www.amazon.com/gp/product/B002FJZYAA/ref=oss_product"]Amazon.com: 320GB External 2.5-in USB Powered Mini Portable Hard Drive: Electronics[/ame]
Now onto the sub
The box i have. Atrend E12Sv B Box Series 12-Inch Single Vented. I am amazed at how high quality this thing is for the price I paid.- [ame="http://www.amazon.com/gp/product/B0013N0UEE/ref=oss_product"]Amazon.com: Atrend E12Sv B Box Series 12-Inch Single Vented Subwoofer Enclosure: Electronics[/ame]
The sub- Alpine SWR-1223D -
Alpine SWR-1223D Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield Signature
The amp- Alpine MRP-M500-
Alpine MRP-M500 Mono subwoofer amplifier — 500 watts RMS x 1 at 2 ohms at Crutchfield.com
The capacitor I will soon have- Tsunami 2 farad digital beast. I notice that when i blast it, the sub doesnt fully hit at times. If that problem isn't fixed with the new alternator, then I will install this. If that problem is gone with the new alternator, then I will return this.
Tsunami PP92UM-CAP | Digital 2 Farad Hybrid Power Capacitor
Both amps are ran with 8 gauge wiring. The sub is done with 8 gauge wiring and the front/rear speakers are done with 16 gauge(nice and small for easy installation, but still supplies plenty of power.) Can't wait for the alternator to come in. I am only able to play the music at 18, otherwise the amp for the sub cuts out(the sub is at +8 on the headunit haha). The highest I went before I had the sub was 32 before I made my ears bleed haha.
I am amazed by the system. The music is so crisp/clear no matter how loud it is. I'll be in a friends car for awhile listening to their stock system, then jump in mine and just be blown away by the difference. I had to spend 8 hours deadening all the panels about a month ago. I can rattle the mirrors to the point I can barely see with them, and I wont hear a single rattle from the car.
This is my first system and I havnt seen anyone else, so I have no idea how advanced/simple my setup is. I enjoy it and its good enough for me.
edit: o btw, thanks for all of the suggestions. will take a look
@vgeek- Dont know much about tuning and all that. I just bought the box because it had good reviews from people using the same sub.