Free Wiring Diagram For 09 Ford Flex 3.5 Ford Forum
So this is the same spare tire well box I made earlier, only with the top section now cut out. The idea here is to try and use this space as part of the enclosure for the space the 18's will need. And of course, they will need plenty of space.
Test-fit in the vehicle, it does fit but the spare tire well has a slight cant to it so the box is angled downward a bit. This will need fixing
You can just see a hint of it here, I had to cut out the bottom of the box to make way for the magnet and the pole vent of the SA-18. Also the cutout diameter of 16 3/4" is what it takes to plop one of these subs in. Astute observers will note that this cutout just barely streaks by the edge of the box on either side of the cutouts. Going 18" was a ballsy move.
I cut the top board to match, and made it slightly wider on the sides, and slightly shorter on the length to allow for other panels to fit in later.
They do fit!
The depth is a bit sketchy
So obviously, a single 18" would have fit under the deck height, but with a pair of them will push the deck higher. This was confirmed A-OK with the owner, who does not intend to carry much cargo. I'll make it look good in here when it is all said and done, but I did lose quite a bit of sleep over it since I'm always used to building stealthy and flat. I'll figure something out.
So I am almost all caught up here, but I did get the box braced inside and coated with rubberized sealant. This thing is approaching the "too heavy to lift into the vehicle" state, so I'll probably test the box out to make sure it is fully sealed and then install it once and forever in the car.
Meanwhile, the effort of wiring continues inside, where it is warmer.
So that brings us current!
Even though it will have 18's in the trunk, this is a sound quality build. After researching and modeling extensively, they produced the best bass respsonse for the approximate airspace I planned on using, and being an SA it should sound great. I've absolutely loved using the smaller ones so hopefully these big boys do fine.
The front stage will be the Eric Stevens components run active, but I'm left to wonder if I can get a shallow midbass under the front seats now that there's no equipment going under them. Y'all let me know what you think. Do the components need midbass to finish off the bottom end? Do they run deep on their own? My basic modeling of them show they can handle an infinite baffle / free-air design just fine up to their rated power, provided they are crossed in the 75hz range. But would they benefit from midbass under the seat? Hmm I'll just have to think about it. I've got the extra sub channels from the BLX5's to use for that, if need be.
Oh well, I guess we'll have to see!
Source: https://www.diymobileaudio.com/threads/2009-ford-flex-3rd-row-removed-18s-etc.412109/
Posted by: gaildesrosier.blogspot.com