[akg7091]

4.5 How do I build an enclosure? [AO]
Build a Sub Enclosure

Just some of the links I found when I googled it sir. You can search around. There are some wonderful guides out there on other forums also. I think screws are better as they offer a better grip than nails and also nails tend to come loose with time more than screws.

[Gill]

Can one use the Bubble test to check the leakage???Otherwise the leakage is hard to detect???
Any opinons!

[low_bass_makker]

One can try one thing more. Push the woofer diaphragm and see that it comes back slowly. The slower the sub comes out better the sealing.

[Gill]

Raghu bai ji,THAT MIGHT NEED SOME XPERIENCE IN THAT TESTING,,I HAVE NONE AND MORE OVER I WON'T BE ABLE TO COMPARE SLOW N FAST.
WE KNOW FOR SURE THERE IS A PROBLEM BUT NOW COMES THE SOLUTION PART,ANY OTHER METHOD ...
BUBBLE METHOD MIGHT WORK BUT ONE CAN'T DO IT AROUND THE DRIVER MOUNTED AREA....AGAIN A LIMITATION...

[low_bass_makker]

Originally Posted by Gill

Raghu bai ji,THAT MIGHT NEED SOME XPERIENCE IN THAT TESTING,,I HAVE NONE AND MORE OVER I WON'T BE ABLE TO COMPARE SLOW N FAST.

It is not a big thing sir. You can try it at least.

[Akashh]

AKG i think the best solution would be to get a ready made enclosure, i am familiar with all the subs in the Indian market, they all have a basic output of 100 to 200 RMS, you could get one 12" sealed Sub enclosure from a brand called BaassFX sold in India. If you tell your subwoofer and its spex i could surely tell you if it matches the same. Cheers.

[akg7091]

Originally Posted by Akashh

AKG i think the best solution would be to get a ready made enclosure, i am familiar with all the subs in the Indian market, they all have a basic output of 100 to 200 RMS, you could get one 12" sealed Sub enclosure from a brand called BaassFX sold in India. If you tell your subwoofer and its spex i could surely tell you if it matches the same. Cheers.

Just one correction. Gill is looking for a new box, not me

[Gill]

Originally Posted by low_bass_makker

One can try one thing more. Push the woofer diaphragm and see that it comes back slowly. The slower the sub comes out better the sealing.

Just did this small test,and the sub came back, at a quite slow speed, one could could hardly feel it comming back to postion(Though it did came back)Though as far as i know if the box in properly sealed teh sub will go go down quite hard once pressed..
So what one can drive after this test......

[Gill]

Originally Posted by Akashh

AKG i think the best solution would be to get a ready made enclosure, i am familiar with all the subs in the Indian market, they all have a basic output of 100 to 200 RMS, you could get one 12" sealed Sub enclosure from a brand called BaassFX sold in India. If you tell your subwoofer and its spex i could surely tell you if it matches the same. Cheers.

Ahashh bhai,
would u plz explain the"all the subs in the Indian market, they all have a basic output of 100 to 200 RMS"
I am really confused!!

[ScarySkulls]

Originally Posted by low_bass_makker

One can try one thing more. Push the woofer diaphragm and see that it comes back slowly. The slower the sub comes out better the sealing.

I tried it on Gill's Sub and Clip's back to back.

On Gill's sub, it goes in easily and comes back also, slowly though.

Clip's Sub, on the other hand would hardly even want to go in.

I guess the second case tells better about the sealing being achieved.

[Gill]

Originally Posted by ScarySkulls

I tried it on Gill's Sub and Clip's back to back.

On Gill's sub, it goes in easily and comes back also, slowly though.

Clip's Sub, on the other hand would hardly even want to go in.

I guess the second case tells better about the sealing being achieved.

Exactly Rajat,i read some where that if You can push on the center of the cone gently for a few seconds and when you let go it should go right back to its normal position right away. If you see it slowly return you have a leak. If you have a completely seal box then you have an air spring, the air will expend immediately after you take your hand away if there is not leak. But on the other hand if there is a leak and you push down on the cone for a little bit, it will give the box time to let that air leak out and when you release it the air will leak back in slowly as the only force pulling it in will be the suspension of the sub wanting to go back to its normal state. That would be a much weaker and slower acting force then air re-expending in a sealed box.

[low_bass_makker]

Originally Posted by Gill

Just did this small test,and the sub came back, at a quite slow speed, one could could hardly feel it comming back to postion(Though it did came back)Though as far as i know if the box in properly sealed teh sub will go go down quite hard once pressed..
So what one can drive after this test......

Then it is ok

Originally Posted by ScarySkulls

I tried it on Gill's Sub and Clip's back to back.

On Gill's sub, it goes in easily and comes back also, slowly though.

Clip's Sub, on the other hand would hardly even want to go in.

I guess the second case tells better about the sealing being achieved.

Yes sir the clip enclosure is quite sealed. But even if it is a very small leak it will not make much of a difference. If the leak is big there will be air noise which you can easily hear.

[Gill]

Originally Posted by low_bass_makker

Then it is ok

LBM
So that means sub enc is fine,,,,there is problem in something else???

Should we look for problem somewhere else...Any pionters!!

[ScarySkulls]

Originally Posted by ScarySkulls

On Gill's sub, it goes in easily and comes back also, slowly though.

Clip's Sub, on the other hand would hardly even want to go in. And when pushed, will bounce back instantly.

In my above quoted example, Please make me understand why even in second case we can call it sealed? Sealed should mean that compressed air will literally kick the cone back into place. Why then it wants to come out slow?

Asking because, I read that in case of a sealed box, a leak will reduce the Sub's capacity to handle power. And it can bottom out easily even at moderate power.

This is Exactly the problem that is being faced.

[low_bass_makker]

Originally Posted by Gill

LBM
So that means sub enc is fine,,,,there is problem in something else???

Should we look for problem somewhere else...Any pionters!!

Originally Posted by ScarySkulls

In my above quoted example, Please make me understand why even in second case we can call it sealed? Sealed should mean that compressed air will literally kick the cone back into place. Why then it wants to come out slow?

Asking because, I read that in case of a sealed box, a leak will reduce the Sub's capacity to handle power. And it can bottom out easily even at moderate power.

This is Exactly the problem that is being faced.

I dont understand what you two guys trying to say. The Sub is bottoming out, But why ? how come what is the problem.

SS if the sub is coming back at a slow speed then it is a good sealed box. Like I said a very small leak will work but one can check for any major leak but playing the sub only and see that any air is coming out or not.