Originally posted by contour_phoenix_when: Dave would it be possible to, for a free air application under the rear deck opening, use one of the mentioned 8" drivers along with two pieces of wood where the piece of wood that the woofer would be attached to has a circular cutout equaling the diameter of the cone and surround material and having a thickness equaling or no less than the one way xmax if the driver; then the piece of wood that will be attached to the bottom of the rear deck will be attached the top of the first piece of wood where this other piece of wood having a circular cutout equaling the diameter of the rear deck opening would be glued so that the air pressure from the speaker would not vibrate the thin metal or the thick piece of wood. Yes there will be some pressure loss but not much. The only problem I see is that a precision tool is needed to create the openings in the pieces of wood. A dremel tool along with a non steady hand would not give a accurate enough cut on an incorrect template drawing onto two pieces of wood 13"X9"X3/4" (LxDxH) to get things to fit correctly. Is this a good way to fire an eight inch driver into a smaller five inch opening without causing to much rear deck rattle?
A thick enough baffle with the driver bottom-mounted to it really is sufficient to take care of the rattles from the rear deck as long as you mount it securely. I used 3/4" MDF for a pair of 8s, and it worked pretty well. The most rattling problems come from the rear deck cover. I cut out the backing above both subs to make it as transpearant as possible, and used some felt carpet padding to further quell rattles.
See here for some pics:
http://photos.yahoo.com/bc/colinmthompson@sbcglobal.net/lst?&.
1999 Ford Contour SVT #900/2760 (SOLD)
2005 Mazda 6s
2003.5 Mazdaspeed Protege
1998 Ford Ranger 4x4
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