[nass]

ok for those that don't know what an infinite baffle sub is, it's basically a " free air " sub meaning you don't need a box to put it in to make your balls jiggle. I was seriously thinking of getting a 12" iB sub putting it onto the rear deck so I could get bass like a hatchback plus it saves my trunk space!

Yes I know the rear deck is a structural part of the car but steps would be taken to re-enforce it. I am not sure if I would have to make a good seal between the rear seat and the rear deck, cause iB subs work best when the cone and magnet are seperated. ie the cone is on one side of a wall the magnet is on the other side of the wall and it's sealed between.

An install like this would only need 1 12" sub to kill small animals

Anyways I am just curious to see if anyone else has done this? either in a focus or any other car.

[Raine]

Infinite baffle systems generally sound quite sloppy, albeit loud. The problem lies with the fact that in a no-enclosure situation, the speaker cone has nothing to reflex off (in a sealed box, for example, it has the air, slightly compressed by the pressure generated at low frequencies), thereby nothing to force the cone back against the signal. Certain IB subs have "springs" to return the cone to position, but such springs can often be TOO tight and result in short, overly sharp bass hits. I still think a sealed fiberglass enclosure is the best option. If space is your concern, either try making a sidewall box, a false floor, or use an Infinity Basslink

[nass]

Raine,Oct 26 2005, 10:37 PM Wrote:Infinite baffle systems generally sound quite sloppy, albeit loud. The problem lies with the fact that in a no-enclosure situation, the speaker cone has nothing to reflex off (in a sealed box, for example, it has the air, slightly compressed by the pressure generated at low frequencies), thereby nothing to force the cone back against the signal. Certain IB subs have "springs" to return the cone to position, but such springs can often be TOO tight and result in short, overly sharp bass hits. I still think a sealed fiberglass enclosure is the best option. If space is your concern, either try making a sidewall box, a false floor, or use an Infinity Basslink
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yeah I know that some of the cheaper subs would sound almost out of phase in comparision to the front stage. I have also heard iB setups that just sounded great it all depends on the car where it sits etc.

I wasn't too too serious about this setup I just had it as an option for something diff. My original plan was for 2 x 12" subs in the trunk on the sidewall, and I already have the glassed mold made out, just a matter of building it up some more and slapping the MDF on. Come to think of it an iB sub in the wheel well would work nicely I would think and no more measuring box size.

As for that basslink, I already have a Pheonix Gold BassCube which I presume does the same thing ( dB boost and variable freq. adjustments )

[Raine]

nass,Oct 27 2005, 10:03 AM Wrote:Come to think of it an iB sub in the wheel well would work nicely I would think and no more measuring box size.
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It would, but you sacrafice your spare. I was going to do this, but couldn't find anywhere else to put the tire so I gave up the project.

[DevilDriver]

well, IB is not at all like free air. in IB, the cone must be separated from the basket (i mean in terms of acoustical space). IB can actually be one of the better anechoic response installs you can do, but does take some fiddling with placement. the rear deck is always a good spot because you can obtain more cabin gain and create a harder to locate sub stage.

[NoiSeeVT]

So what is the difference even free air speakers have to have some type of baffle, you cant just sit them in the trunk and tehy will work. If you want to do it you have to make sure your trunk is well sealed as well as the area you mount it to, most people have moved away from this as it it difficult to do plus you can get small ensclosure subs which outperform them.

David

[DevilDriver]

NoiSeeVT,Oct 27 2005, 03:14 PM Wrote:So what is the difference even free air speakers have to have some type of baffle, you cant just sit them in the trunk and tehy will work.  If you want to do it you have to make sure your trunk is well sealed as well as the area you mount it to, most people have moved away from this as it it difficult to do plus you can get small ensclosure subs which outperform them. 

David
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the true definition of free air is the use of some form of suspending the speaker in air, with no form of a baffle, and playing into a large open space.