I just purchased a 12 in. AQ hdc3 and I'm going to be running approx. 1200 wrms to it. I'm using 3/4 mdf for box material. I want the box to be at 34-37 hz. My maximum dimensions are 32Wx15Hx16D. I would also like to use internal bracing if that is needed? I'm open to suggestions, I'm new to this but I have someone helping me build the box. Thanks for any help!