Just purchased 2 12" dual 4 ohm Rockford HX2'* and 2 12" dual 4 ohm Rockford P3'*. In a quad box. I will be porting each chamber. Each chamber is about 1.8 cubic feet. So if i install 4 inch diamteter round ports 10" deep.. it will be tuned to about 38-40hz. I know thats a little high but thats the only way i can make this box useable.. its to small to remain sealed. All will wire the box down to a 2 ohm load.

I am purchasing a Memphis 16 pr-1.1000 amp next weekend. I know this amp wont beable to push the subs at RMS or above... so after a short time i might remove two of the subs (kind of the reason i will run all 4 for a short time.. to see which i like better, the HX2'* or the P3'*)
P3 excursion test
http://www.youtube.com/watch?v=qXIQAm9bLVE

HX2'*
http://www.youtube.com/watch?v=9E3up...eature=related

all subs are 500rms and 1000w max. and all are Dual 4 ohm voice coils

lol man i commented on one of them vids and then realized the date on them lol thought hey were recent lol. ya got a good deal for them mang. i had a 15" HX2 and thoughtit was pretty decent for a pawn shop sub lol nah i liked it alot but did buy it at the pawn shop FTW. if ya need recones on them ever i might know a guy that can do it

sounds good.. Just ordered a DB Meter from sonicelectronix also

Just wired the subs up to my buddies 1000w Alpine and OMFG!!! Ridiculous! I haven't heard anything like that in a long time! Quite possible loudest car In Town!

nice!
thats what i had in my GP few years ago

http://i338.photobucket.com/albums/n...c/P1030254.jpg

Try pulling up to me one day.

15" Hifonics Olympus, 1600W RMS @ 1 ohm, running on a Hifonics 1600W @ 1 ohm RMS amp.

What I really want though is old school. An 18" Kove Audio U2 Armageddon. That literally would take up my entire trunk.

I know the pics are chitty, ill get better pics in the daylight

Lets Run em! I think i might beatcha.. I am under powering em a little but they still slam and have good excursion for a smallish sealed enclosure. pushing em with a 1000w rms/2000w max Alpine amp.

Its not all in just the subs. I'm very curious to see how you're going to build this enclosure. I built mine custom and tuned it to 32hz, which is just above the free air resonance frequency. Its a ~3.25 cubic foot ported enclosure, reinforced at all edges and corners internally. One day I'd love to meet up with you and hear what sounds like. I can only imagine that 4 subs will move a lot of air.