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Can free air work in this case?
Can free air work in this case?
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Old 1st February 2006, 07:18 PM   #1
Safe_Cracker is offline Safe_Cracker  United States
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Default Can free air work in this case?

I have a Pontiac GrandPrix GTP (2001), I now am the proud owner of two Kicker sx1250.1's and two ID MAX V.3 DVC 2's. I was searching the net for enclosure ideas, I have a pretty big trunk for a later model car. I found a guy who has the same subs but they are mounted to his back deck, how well could this work? Can this perform just as good as a sealed or ported enclosure? Any help would be greatly appreciated and I love pictures too, lol. Polo..

PS- Sorry, here is the pic....

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Old 1st February 2006, 08:09 PM   #2
Stocker is offline Stocker  United States
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The rear deck MUST be reinforced with lots of glass or MDF, or else your car will be a rattletrap.
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Old 1st February 2006, 09:29 PM   #3
trusound is offline trusound  United States
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IMO the only way to do subs in a car is free air...you may loose a Db or so...but the trade off is well worth it...juat make sure the trunk is sealed real well and the baffle does not flex in any way..
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Old 1st February 2006, 09:33 PM   #4
tade is offline tade  United States
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I agree with trusound.
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Old 1st February 2006, 10:42 PM   #5
Safe_Cracker is offline Safe_Cracker  United States
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I have one of those little arm rest doors, seal that up too? Isn't that just like creating an extra large sealed enclosure but out of your trunk, basically? thanks...Polo..
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Old 4th February 2006, 07:11 PM   #6
NaftaliG is offline NaftaliG  United States
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Default ?

While I do not question the ideas above for use in hi fi car audio situations, I do think that we are mislabeling them.

The way I understand it, is that free air denotes a speaker literally in free air. For example, a speaker in a back deck lid that is not sealed. This leads us to Infinite baffle, which is what I think has been described above. If the back deck is sealed around the driver, then the trunk acts like a large sealed enclosure (as mentioned). Although the trunk volume should be about 10 times Vas or greater,I think some trunks may very well be.

Perhaps someone more knowledgeable could check this over.

Otherwise great work, I'm jealous of the SX amps.
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Old 4th February 2006, 10:17 PM   #7
Safe_Cracker is offline Safe_Cracker  United States
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WOW, a fellow Chicagoan, lol. That picture isn't my car but someone elses. I ordered 2 RE sx15" DVC 2+2's. I have decided to build a baffle behind my rear seat and make the rear seat back able to fold flat. I have a rather large trunk, about a 4 body one. I hope to have everything mounted soon and those SX amps are GREAT! Polo..
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