I've designed a box for the back of my 09 Maxima, but am trying to decide what sub(s) to run in it.

I have 1.9 cu.ft. available if I run the box sealed. I have not decided on the amp, but I will be keeping it under 600W RMS.

The subs I am looking at:
1- JL 8w7
1- JL 10w6
1- JL 12w6
4- JL 8w3
2- Alpine SWR 8

I have the depth for any 8'' sub, most 10'' subs, and the area for 12'' subs if they don't have a wide trim ring, and aren't too deep.

The purpose of this build is to add the low end to the factory Bose system in the Maxima. SQ is key here, with SPL being an after-thought. I do like to be able to turn my music loud on rare occasions though. I used to do loud and louder, but have gotten away from that.

If you have thoughts or comments on the sub selection, or other ideas, I would like to hear them.
I used to do custom stereo, but that was a decade ago, and I don't remember all that I used to. I used to run memphis gear, and like that, but from what I remember, the JL had a better sound to it.

Some of my previous setups and builds to give you an idea of what I used to do.

 

With that amount of air space, I would think that you could use two 10W6's. If not, a single 12W6 would be nice. I ran one for several years.

 

W6 or SSA GCON 12.

 

The new alpine type R as of 2012 is the same design as 2011 type X. Same price. Prolly winter hit as hard as a W6 but two 8's would keep uo with heavy metal bass haha

 

May be late to this but ive been looking At a set of Sundown SA8-V2

 

Wow your builds are crazy ( in a cool way). I'm pretty sure you like SPL more but SQ definitely W7 is great quality.

 

There is someone selling a pair of Sundown SA-12's in the classified section. Great sub for the price ($200 retail new) and properly tuned to the car they can give you both SQ and SPL.

Personally I've also been a fan of Cerwin Vega's. They used to be all the rage back in the day, but have faded in popularity here in the US, but still maintain a strong following and popularity in Europe. I'd take a Stroker Pro over a JL W7 any day.

Back to the Sundowns... If you are familiar with Peter Kulicki with PWK Designs (formerly with Team Toxic Bass) you'll know how serious of a guy he is, since he's an acoustic engineer. He currently is running these subs in his own personal car. Here's a demo video of it. *spoiler alert* He does a SPL test at the end of the 2nd vid. Also, he can design an enclose for you. Info on what he needs is on his PWK website.