Pretty much decided but.....suggestions/changes/opinions???

ya it will power them fine. you need to wire them exactly like the first model. if u wanna go 3 subs, u will want
this amp thats black
http://www.sonicelectronix.com/item_14613_Power+Acoustik+LFA1-2000D.html
or the one to match ure front channel amp
http://www.sonicelectronix.com/item_9723_Power+Acoustik+PS1-2000D.html

well i guess u could get the S4 subs and that would give you a lower independence so it would push more power, like 1000RMS or a little less. so ya u could prolly go that way and still be safe AND loud as balls!

if u wanna go 3 subs, go this amp from this place, its a good store and alot cheaper. this is where i will buy my amp.
http://cgi.ebay.com/POWER-ACOUSTIK-...m14&_trkparms=72:570|66:2|65:12|39:1|240:1318
and get the S4 model here.
http://www.sonicelectronix.com/item_13440_Hifonics+HFi+12S4.html

 

it all depends on whether you have the room for 3 subs and the final impedance of the 3 will determine what amp to choose.

 

its really up to you. if you like the sound of just the front speakers then remove them. if not. put something there.

also i should note if you go the "no rear" route and get 3 subs. you will/might need to deaden the rear shelf a bit. you can do it cheaply by getting a small roll of peal and seal from lowes.

 

i told a friend to use 2 shoe boxes and some peal and seal for his rear speakers. its works for him and its cheap.

his girl is a shoe freak so boxes are easy to come by for him. you may have to trim them a bit. also make sure the surface is clean so the peal&seal will stick.

 

the volume required for three 12s would be at least 6cuft for a decent box. i recently built a 5.3cuft box for two 12s for a friend that gets super loud and super low.
http://www.caraudiotalk.com/audio-forum/showthread.php?p=64982#post64982

 

not really. it depends on the design. an L ported box is easy as pie.

thats what i made.

 

holly.. why so cheap for all that??

 

its because we are awesome... haha
Thats how much stuff actually costs when a shop doesnt rip you off.

 

now the HU will need this

2004 NISSAN ALTIMA 4DR SEDAN WITH 2.5L ENGINE AND STANDARD AUDIO SYSTEM KIT

http://metraonline.com/productsl.aspx

thata was assuming you have a 2.5L motor and standard stereo without BOSE.

 

because the altima has that entire panel covering it. (the ac and heat and the side nobs for tune and vol the deck itself is pretty big.) if you hit the interwebz and snag your self a dash kit for your model it will come with a handfull of spacers and a replacement panneling for the dash. the little bracets should mount right onto the.... mounting spot on the HU adapter. it will pop right in. although I've come to notice on the last two I've done, a little snagging on the lower left side (07, and 05 models 05 had bose). but that's probably just me. also if you havnt pulled the pannel off yet watch for the little retaining clips nissan makes tough ones lol you can snag and break the peg right off.

 

Whole section on it right here!