Free air build rear deck?

[CadillacBass]

Hello all need some input I got a 96 Cadillac fleetwood that I want to run two 12 free air subwoofers in my rear deck because it's big enough to and also got limited space in my trunk,how should I about doing this,should I do something out of wood with a woofer spacer or should I go fiberglass? In the picture is something what I like to do minus the amp

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[SlugButter]

Wood. Your subs won’t mount well in just fibergalass.

 

[CadillacBass]

Wood. Your subs won’t mount well in just fibergalass.

So use what size wood you recommend and still use the spacer?

 

[SlugButter]

You can use a spacer, if you like the looks. It’s not necessary for the install. Use at least 3/4 inch wood. I would do as thick as you can, especially of your subs have decent power and excursion. MDF is probably normally used, but you can use most anything. Oak, pine, birch. Birch is pretty light. So is pine. It’s double the cost of mdf though.

 

[SlugButter]

The rear deck needs to be very solid. Brace it wherever you can. What subs are you running free aired?

 

[CadillacBass]

Ok cool I want a raised look to the subs on each side of the deck so mite use the spacers to do so , should I bolt the boards to the deck though?

 

[CadillacBass]

I was looking at the infinity air subs

 

[SlugButter]

I would remove the rear deck completely and redo It. you wont want subs screwed into that thing at all. It will likely rattle badly.

 

[CadillacBass]

So how would the board mount if I don't attach it to the deck somehow

 

[SlugButter]

I’m not seeing any infinity that say they are to be used free air. Some companies make subs that are specifically designed for it. I did see a rear deck with kicker comp subs, which are cheap and low powered. didnt sound bad.

 

[SlugButter]

you could try to run some wood underneath the deck., but it will have to be tight to the stock deck, or you will rattle terribly. This isn’t as easy as it sounds to do right and sound good. Is it a nice flat deck, or does it have some curves and dips?

 

[SlugButter]

The rear of the subwoofer has to be sealed off in the trunk. If you get any rear waves coming from the back of the sub into the cabin, it will ruin the sound.

 

[CadillacBass]

Infinity Primus 1270

Primus Series 12" 4-ohm component subwoofer

www.crutchfield.com

 

[CadillacBass]

It's pretty straight just bumpy where the factory speakers are but that area will be cut out

 

[CadillacBass]

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