Sealed Enclosure Please Help.

[CodeNameU]

Hi, I'm new to this build-your-own sealed box thing. I have 2 Alpine type R 12" thin woofers and also will be using 2 ARC xdi v2 amps (one for each woofer). I pretty much listen to all types of music depending on mood. My goal is to have a chambered sealed box (to save trunk space) and box built between 40hz to 45hz with the best SQ. The car that is going into is a 05 lexus LS430 and with 37"L (left to right) 15"H (top to bottom). How deep should I go to achieve my goals? I will be using 3/4" wood with no ploy-fill. Please help if you can. Or maybe Joe X. (if you have free time) Please help. Thank you guys in advance!

[Joe X]

Welcome, are those subs the new 5th generation (SWR-12D4) ones or older ones.

[CodeNameU]

Welcome, are those subs the new 5th generation (SWR-12D4) ones or older ones.

Hi Joe, These are the SWR-T12. Thank you for the fast response!

[Joe X]

Here is your request, Qtc = 0.95 (if that's what you really want), power: to subs rated, figure is just an assembly guide, use some damping inside like polyfill:

NOTE: If building outside you need to build a cardboard dummy box to test fit in it's way inside.

[CodeNameU]

Here is your request, Qtc = 0.95 (if that's what you really want), power: to subs rated, figure is just an assembly guide, use some damping inside like polyfill:

NOTE: If building outside you need to build a cardboard dummy box to test fit in it's way inside.

Thank you so much Joe X !! I'll try it out and let you know how it sounds.

[Joe X]

You will be giving up a lot of output and low end extension, hope you understand that but it should sound clean.

[CodeNameU]

You will be giving up a lot of output and low end extension, hope you understand that but it should sound clean.

Clean sound is what I am looking for now. For some reason if I want to maximize the full potential of those woofers in the future (in the same car with a sealed box), what are the measurement of the box?