Free air subs?
curious on how they work, what their proper application would be, any differences in construction, etc?
its been a question nagging at me for the past couple of days and havent really found a good explanation of it

thanks

wicked

a free air sub is a sub that doesnt require a box



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I personally don't like the infinite baffle setup. It's too sloppy.


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arent they just like 6x9s w/o the tweets?

basically infinate baffle (free air) is a speaker that doesnt play well in a small enclosure, it requires a huge enclosure, basically about the size of your trunk. so instead of building a box. you just seal off the trunk from the interior cabin and put the speakers on the baffle so now your trunk is basically acting as an enclosure, they can sound good if done right, but most people dont take the time to seal up the trunk from the interior properly so allot of installs sound bad. most people just hear the word free air and think they can just throw them in the trunk and be done with it.


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thanks for the info jason
and on isobaric(?) enclosures, how does the sub firing into the othersub work exactly?

by the way like your enclosure, did you do that yourself or had someone do it for you?

wicked

isobaric, is the way your thinking is a clamshell one sub in the box the normal way and another on top of it facing it, the one on top u wire out of polarity with the first sub, so now whenever the first sub pushes out the one on top of it pulls in. this gives your subs allot of control, this was big in the early 90's because you could take a sub that needed say 1 cu. ft. of airspace, slap another sub on top in a clamshell isobarik, and now that box only needs to be .5 cu.ft. so allot of people were doing it, to cut the box size in half, this is back in the day when most 12's on the market needed up to 1.5 cu.ft. for a sealed box. so u gained allot of space, and u gained control over the sub. but u got less bass. basically your throwing away the bass output of one sub. generally it would be about 3db less then two subs in a standard box.




as for the sub enclosure, i built it myself and its up for sale actually. theres a for sale post of it in the regions forum under the area for ohio/indiana.


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wouldnt fit my car but it looks good, thanks for the info

wicked