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Old 19th April 2009, 11:08   #1
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Default Problem with sub enclosure

I just bought a GZ Titanium MK2 12" sub and made a 1 cu ft enclosure for it. However, i cut the pieces of MDF before the sub arrived and made the hole on the box to exactly 12 inches.

But it turns out this is too big for the sub which measures quite a bit less than 12" at the level of the basket. The rubber gasket is just bigger than the whole and there isnt enough space to put in the screws.

What do i do now? It wont be possible to take apart the box and build it again.
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Old 19th April 2009, 11:26   #2
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You will have to change that part of the box.

different woofers have difference in the circumference. Some are exactly round but when compared to others they are not.
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Old 19th April 2009, 11:37   #3
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make a big spacer ring ?
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Old 19th April 2009, 11:48   #4
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Quote:
Originally Posted by greenhorn View Post
make a big spacer ring ?
Ya...You can put another mdf board on it the same side with smaller hole in it. It will help in bracing the box and will yield better results..
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Old 19th April 2009, 11:50   #5
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As you are going sealed it is necessary that the enclosure is made keeping every detail in mind.The best option for you will to remove that piece and put a new one in place.

Last edited by DjNik : 19th April 2009 at 11:51.
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Old 19th April 2009, 11:57   #6
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Will this arrangement make it more difficult to seal the box ?

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Originally Posted by low_bass_makker View Post
Ya...You can put another mdf board on it the same side with smaller hole in it. It will help in bracing the box and will yield better results..
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Old 19th April 2009, 12:07   #7
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Found this nice, easy to understand article on Crutchfield on how to build a subwoofer box. Have a look, it may be helpful.

How to Build a Subwoofer Box
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Old 19th April 2009, 12:14   #8
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Quote:
Originally Posted by adityamunshi View Post
Will this arrangement make it more difficult to seal the box ?
Why..you are putting two flat MDF boards one with 12 inch hole and other will 11 inch hole. Put some solution between them before fitting, this will seal them perfectly.
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Old 19th April 2009, 12:14   #9
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like other said you can remove the whole piece or can put a spacer ring.

or you can put a whole new piece on the cutout side covering the old with the new piece with a smaller size cutout,this will not cause any problem to enclosure and will not leak

edit:just saw lbm post go with the same as suggested by him that will be the best way to do it.

Last edited by karankapoor : 19th April 2009 at 12:17.
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Old 20th April 2009, 10:00   #10
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Quote:
Originally Posted by DjNik View Post
As you are going sealed it is necessary that the enclosure is made keeping every detail in mind.
On the contrary. Sealed boxes are most tolerant of minor differences in enclosure volume.

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Originally Posted by low_bass_makker View Post
Why..you are putting two flat MDF boards one with 12 inch hole and other will 11 inch hole. Put some solution between them before fitting, this will seal them perfectly.
Exactly. LBM is right. All you need to do is make a new baffle and attach the new baffle to the box.
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Old 20th April 2009, 10:21   #11
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to the fact that sealed enclosures are the most tolerant to minor volume differences, what i wanted to suggest is that whichever option he chooses, it is sealed as properly as possible to get the expected performance out of the sub.
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Old 20th April 2009, 11:59   #12
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Im doing what LBM suggested. Will buy some more MDF today and update the thread tonight.
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Old 22nd April 2009, 22:03   #13
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Fitted another piece of MDF with an 11 " hole onto the box. Works fine.

The cone takes around 3 secs to come back up after i push it down. Is this good ?
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Old 22nd April 2009, 22:09   #14
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Ya very good.....how is the wire coming out..Are you using a terminal or direct hole ?
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Old 22nd April 2009, 22:12   #15
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Its a speakon connector. Does 3 secs mean there's a slow leak ?

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Originally Posted by low_bass_makker View Post
Ya very good.....how is the wire coming out..Are you using a terminal or direct hole ?
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