SPL Setup

Heres my dilemna. I'm just getting back into  wanting to compete. So I'm going over every option for my vehicle. I have a 2000 Extended Cab Chevy 1500. I want to do 4 12" subs where the back seat is at now. Removing the seat of course.

My question: When looking for subs would excursion play a factor for you guys? Keep in mind I'll be competing SPL only.

The reason I ask is the two brand of subs I'm looking at that are readily available to me have the following excursion: 14mm and the other has 18.7mm. Both are rated at approximately the same RMS, 600rms for the 14mm and 500rms for the 18.7.

Brands: Rockford Fosgate T1 and Dayton MKIII

I want RE, but I am having a hard time finding them readily available. Other recommendations to me have been the 12" Memphis MOJO. But they require 3cu.ft per sub for vented with an RMS of 1000. And I'll only be pushing 2000 watts RMS.

Any recommendations would be appreciated.

Whiskey, Tango, Foxtrox...OVER! My head is spinning like the day after a bottle of Patron!

Ham...I'm going to have to search through all of your posts now and compile an audio reference manual (I'll have to include DYohn as well). Always good stuff from you guys. Always something that makes me glad I joined this forum.

BTW...nice SIG change.

I may be the only person on this forum that does this, and there may well be a good reason for that, but you could consider using pro audio drivers rather than automotive components. The reason for doing this is the massive increase in sensitivity, giving you much more volume for the amount of input power you have available. To give you an idea of the difference the new JL audio 12W3v3 has a sensitivity of 87.15dB 1W/1M, whereas the eminence delta 12A i use (x2) in my sub has a sensitivity of 98.3dB 1W/1M. This equates to around 10 times the power input to the JL driver than the eminence driver to make the same SPL. The downside is that excursion on pro audio drivers is significantly lower. I decided to try doing this because of my pro audio background, and so far i am very pleased with it. I'd like to know if anyone has any opinions on not using automotive/mobile audio components. You may find it interesting, while im blabbering on about sensitivity, that i've built a horn loaded sub that has an efficiency of 102dB 1W/1M and with a 350W input from my amp will blow the bloody doors off! The picture below shows the sub missing its side so that you can see the horn section (which is 7 feet long!)