[Nightmistx22]

Flex,

I would suggest reading up on some of XR's subwoofer threads. Several have followed the Cone Area is King approach ( dual 18's infinite baffle) to get the most out of the lower frequencies without killing trunk space.

I will be starting with my 10" JBL P1022 sub in a fiberglass box meant for the passenger side cubby of an RX8 that I use to own. I am considering doing that dual 18" sub build.

 

[Nightmistx22]

I agree 100%. My experience with SDS was exceptional. I told them what my build plan was and they were able to help me adjust my quantities accordingly. They were also able to save me nearly $20 on shipping by combining everything into a single box. They were also very prompt with any questions I had. Highly recommend them for anyone doing anything with sound deadening.