carboard speaker box
11-21-2008, 04:37 PM
#17
they can try to mount the speaker "backwards" onto the box.
meaning the basket is outside and essentially, the woofer is pointing INTO the box.
can clear up some space that way...
meaning the basket is outside and essentially, the woofer is pointing INTO the box.
can clear up some space that way...
11-21-2008, 06:20 PM
#19
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reason you use thick wood is so that it doesn't flex. if it flexes, it changes the frequencies and sounds like poo poo
reason most people use wood over other things is because it's easy to work with
my opinion is yeah, it might "work," but that's very subjective
reason most people use wood over other things is because it's easy to work with
my opinion is yeah, it might "work," but that's very subjective
11-21-2008, 08:39 PM
#23
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Looks like it would work for a while depending on the sub and how much power he is going to push. Will it sound good? probably not. Like what others said, the carboard will flex and won't help with the sound. Subwoofers push a lot of pressure to make bass and needs to make the right amount of it in a correct amount of volume depending on the type of box. Looks like a sealed type and would seem like it would break a seal after it starts kicking for a while. Then theres the issue of the expansion foam. Foam is not a fully solid state object so it might absorb some of the sound. Although some people use fillers like polyfil inside sealed boxes to help dampen some sound and especially used for smaller boxes in attempt to expand the box volume without actually making it bigger. Expansion foam on the other hand, will probably just muffle the sound.
11-21-2008, 09:33 PM
#26
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And the update:
Originally Posted by golfvariant
Well... im amazed to say it worked, held together perfect with near to 0 flex. Here are my findings:
1. Box leaks a little air, prob from one of the T-nut's that wouldn't thread
2. I'm overpowering that Perfect12.1, rates for 400rms, im giving it 500rms
3. Foam made the cabinet size too small so will need to gut it out a little and hope it doesn't affect the structure
Both video's are from my cell phone so the sound quality if beyond crap. With-out making any adjustments the sub is prob good for 85-90db @ 80hz (box tuned wrong)
I was also asked its weight, with-out the sub the cabinet weighs 6.6lbs
http://homepage.mac.com/bdub03/.Pictures/cbox1.wmv
http://homepage.mac.com/bdub03/.Pictures/cbox2.wmv
1. Box leaks a little air, prob from one of the T-nut's that wouldn't thread
2. I'm overpowering that Perfect12.1, rates for 400rms, im giving it 500rms
3. Foam made the cabinet size too small so will need to gut it out a little and hope it doesn't affect the structure
Both video's are from my cell phone so the sound quality if beyond crap. With-out making any adjustments the sub is prob good for 85-90db @ 80hz (box tuned wrong)
I was also asked its weight, with-out the sub the cabinet weighs 6.6lbs
http://homepage.mac.com/bdub03/.Pictures/cbox1.wmv
http://homepage.mac.com/bdub03/.Pictures/cbox2.wmv
Last edited by sybir; 11-21-2008 at 09:36 PM.
11-21-2008, 09:44 PM
#28
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another problem...uh you forgot to paint it maybe? or is that the look you werre going for? lol? i guess nobody will want to steal it.
11-22-2008, 12:27 AM
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It'll work but will sound terrible unless you compensate with enough power.
My friend and I used to build calculated enclosures for speakers and sometimes prototyped the design with cardboard... (to get a feel for size/design, not for sound)
The enclosure is necessary to act as a baffle which affects the low frequencies more than the highs. First, the enclosure separates the front of the driver from the rear, which prevents the larger wavelengths from cancelling each other out. The volume of the enclosure creates a resistance to the various frequencies which affects the frequency response; ie the Q value.
My guess is that the flexible cardboard will act as a larger effective baffle than the actual volume of air. This will cause the bass response to fall off. Blah blah blah....
Bottom line... the cardboard box will "work"... sorta. But as far as speaker boxes go, it's "bad". Then again, the average person putting together a random, uncalculated wooden/plexi/fiberglass box isn't much better.
This can all be compensated for with strong amps and a properly set equalizer.
My friend and I used to build calculated enclosures for speakers and sometimes prototyped the design with cardboard... (to get a feel for size/design, not for sound)
The enclosure is necessary to act as a baffle which affects the low frequencies more than the highs. First, the enclosure separates the front of the driver from the rear, which prevents the larger wavelengths from cancelling each other out. The volume of the enclosure creates a resistance to the various frequencies which affects the frequency response; ie the Q value.
My guess is that the flexible cardboard will act as a larger effective baffle than the actual volume of air. This will cause the bass response to fall off. Blah blah blah....
Bottom line... the cardboard box will "work"... sorta. But as far as speaker boxes go, it's "bad". Then again, the average person putting together a random, uncalculated wooden/plexi/fiberglass box isn't much better.
This can all be compensated for with strong amps and a properly set equalizer.