i am in the process of doing a spl/daily setup in the trunk of my 2000 regal what is the best way to get good bass and numbers.
i will have two 10's or 12's the seats fold down if that helps

 

If you're looking for numbers, you might want to start off by picking up a termlab

 

i would say 4cuft on 2 12's tuned to 35-40hz.=)

 

get 2 subs and run 3000watts rms to 12" tuned to what patotay said port it by the 6x9 seaker hole and if the seats fold down make the subs fire front should be nice and loud for ya

 

I have a 2000 Regal. You can fit two ported 15's depending on the space between the woofers and box thickness, I measured 9 cuft of USABLE space without the seats folded, I think the max width was 33-34", if you don't mind having the seats folded down permanently, that'd be your best bet. Those trunks are spacious. If you want an SQL system that can hit a good number then I agree with danyman, 2 12's that can handle 1500W each tuned to 32-38hz is probably the route with the least headaches.

 

ok that sounds good. have anyone of u heard the TF ONE 12's i think those would be the choice of subs for me

 

i have used tf1 12's and they are an awsome sub, also, if your loooking for numbers you might wanna tune higher than suggested here. tuning low will be loud as hell for daily but it wont put up numbers on a meter

 

i was thinking about switchable ports for SPL

 

you planning on using round ports? i found plot port worked for me in my trunk car for competition.

 

make a center square port 50% in the the box with a ring peace to screw it in and make multiple lengths for different tuning