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Old 14th December 2013, 22:06   #1
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Default FiberGlass Sub enclosure in a CNG Swift

yes guys, you read the title correctly, i have successfully made a fiberglass sub enclosure for a swift with a CNG kit

Pics follow.

Sorry for the bad quality pics, i did not document the entire process.
i will post daylight pics of the completed product tomorrow.
cheers!
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FiberGlass Sub enclosure in a CNG Swift-1.jpg  

FiberGlass Sub enclosure in a CNG Swift-2.jpg  

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Old 14th December 2013, 22:48   #2
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Default re: FiberGlass Sub enclosure in a CNG Swift

A good and nice innovation. Please try and put before and after pictures if you can. Also, do let us know what drew your attention of having such a thing in place. I am also concerned about the sound quality as the kenwood speaker/woofer is quite below the CNG cylinder. Do you feel the difference in sound quality. Best wishes.
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Old 15th December 2013, 18:55   #3
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Default re: FiberGlass Sub enclosure in a CNG Swift

Quote:
Originally Posted by mints21 View Post
A good and nice innovation. Please try and put before and after pictures if you can. Also, do let us know what drew your attention of having such a thing in place. I am also concerned about the sound quality as the kenwood speaker/woofer is quite below the CNG cylinder. Do you feel the difference in sound quality. Best wishes.
Hey,
Well, i was earlier running a slim sub under the cng tank, but slim sub drivers do not just cut it.
Hence i went in for a custom fibreglass install.
The kenwood sub sounds tight and punchy, the subwoofer placement does not really matter that much, usually in hatch backs it sounds best when it is firing towards the boot lid (because of cabin gain)
The subwoofer is cut of at 70Hz, all frequencies below 85hz are unidirectional, that means that our brain can not pin point the location where it is coming from..
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Old 16th December 2013, 14:04   #4
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Default re: FiberGlass Sub enclosure in a CNG Swift

Quote:
Originally Posted by HimuraKenshin View Post
... all frequencies below 85hz are unidirectional, that means that our brain can not pin point the location where it is coming from..
LOL where did you get that? Of course it is possible to figure that out (at least it is coming from rear), unless there are multiple reflections interfering. The issue is of integration with the front image, which one uses TA to achieve.

Anyhow, congratulations. Fantastic DIY effort!!!
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Old 16th December 2013, 16:02   #5
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Default re: FiberGlass Sub enclosure in a CNG Swift

Mod Note : There are several spelling & grammatical errors in your posts. This negatively affects the forum experience for other readers.

Kindly ensure that you proof-read your posts prior to submission. Also, it would be a good idea to use spell-checkers.

Last edited by GTO : 18th December 2013 at 14:20.
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Old 17th August 2014, 09:40   #6
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Default Re: FiberGlass Sub enclosure in a CNG Swift

Quote:
Originally Posted by DerAlte View Post
LOL where did you get that? Of course it is possible to figure that out (at least it is coming from rear), unless there are multiple reflections interfering. The issue is of integration with the front image, which one uses TA to achieve.

Anyhow, congratulations. Fantastic DIY effort!!!
Thanks for the kind words.
Sorry for the late reply,just saw this. haha

Sorry for the wrong use of terminology, what i meant was that bellow 80Hz or so, is the point at which human hearing sound localisation ends. At lower frequencies to adjust localisation of sound, phase and amplitude come into play. This is because at lower frequencies the wavelengths are so large that the distance between our ears is far too small to perceive the difference
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Old 17th August 2014, 10:53   #7
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Default Re: FiberGlass Sub enclosure in a CNG Swift

Great effort, have a few questions since I intend to do something similar:

1. How many layers of fiberglass did you put on the enclosure to make it rigid?
2. Where did you source the speaker ring?
3. How have you fixed the new enclosure so that it doesnt move about?
4. How did you measure the enclosure volume for the subwoofer?
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Old 17th August 2014, 11:08   #8
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Default Re: FiberGlass Sub enclosure in a CNG Swift

Quote:
Originally Posted by SunnyBoi View Post
Great effort, have a few questions since I intend to do something similar:

1. How many layers of fiberglass did you put on the enclosure to make it rigid?
2. Where did you source the speaker ring?
3. How have you fixed the new enclosure so that it doesnt move about?
4. How did you measure the enclosure volume for the subwoofer?
Hey, thanks for the kind words, answering your questions one by one.
  1. The box is made up of chopped mat fiberglass, 3/4 layers all over.
  2. I sourced the speaker ring from a person near my house who makes sub woofer enclosures and speaker boxes, he is a friend so gave it to me for free. To measure the integrity of the box, you can use a scientific method called the stand test, you stand on top of the box, it shouldn't flex or break :P
  3. I fixed the enclosure in place with the help if wooden supports. it s not screwed to the body, but in fact held in place by 2 wooden strips that apply pressure on the enclosure from the CNG tank/stand.
  4. I measured the volume by pouring water inside it and then measuring the water. HAHAHAHA this also helped me in checking for leaks.
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Old 11th November 2014, 13:40   #9
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Default Re: FiberGlass Sub enclosure in a CNG Swift

Hey must say you have got a very clean install in your ride.

I can understand the space constraints with a CNG kit fitted but you have overcome that as well as kept the looks of the install very clean.
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