dual end sealed box for sub
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=117749
Printed Date: April 28, 2024 at 5:46 PM
Topic: dual end sealed box for sub
Posted By: comfy_shoes
Subject: dual end sealed box for sub
Date Posted: November 15, 2009 at 6:58 PM
Hi there. I was wondering if it was possible to build a sealed box where both ends of the sub are sealed instead of just having one side sealed? if so what would it sound like. I want the tightest bass possibe!
Replies:
Posted By: i am an idiot
Date Posted: November 15, 2009 at 7:44 PM
I think that will not make much bass at all.
Posted By: blackcivichatch
Date Posted: November 15, 2009 at 7:45 PM
Lol, No bro. You're gonna get little to No noise at all.
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UNLABELED Custom Car Club President
Posted By: DYohn
Date Posted: November 16, 2009 at 10:02 AM
Yea... an enclosure with both ends sealed would pretty much be a vibrator... 
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Posted By: i am an idiot
Date Posted: November 16, 2009 at 7:52 PM
If Haem built it, it would not vibrate. 
Posted By: haemphyst
Date Posted: November 17, 2009 at 8:26 AM
i am an idiot wrote:
If Haem built it, it would not vibrate.
Not quite enough bracing!  ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: blackcivichatch
Date Posted: November 17, 2009 at 8:50 AM
Who needs 'bracing' ??
Wut it NEEDS is a Plexiglas window and some LEDs!
 ------------- UNLABELED Custom Car Club President
Posted By: ianarian
Date Posted: November 17, 2009 at 12:01 PM
EH......em.... full credit for trying at least... Keep on thinking outside the box!
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This is what I do for FUN!
Posted By: comfy_shoes
Date Posted: November 17, 2009 at 9:11 PM
technicaly when a sealed sub enclosure is in a trunck isn't it theoreticly sealed at the opposite end? althow the sub enclosure is 1.5 cubic feet and a trunk maybe 15.....(just a guess) I am thinking I could seal the opposit end as well......althow maybe with more volume! what if I used a diaphram at the one end?
Posted By: i am an idiot
Date Posted: November 17, 2009 at 9:29 PM
Play your system and hold your hand on the speaker enclosure. Notice how little it moves. Now close the trunk, play it again and hold your hand on the trunk lid, and the fender. Notice how much more the trunk lid and the fender moves. A particle board box will flex very little. Your idea will make no sound.
Posted By: whiterob
Date Posted: November 17, 2009 at 10:16 PM
comfy_shoes wrote:
what if I used a diaphragm at the one end?
Using a diaphragm or something similar would not be any improvement in sound over a sub itself. Your sub is going to make sound from the movement of the cone. If you put a diaphragm at the end it will also make sound from the movement of it. So all you would be doing is having your sub drive a diaphragm. There would not be anything to gain it would just be a transfer of energy from the sub to the diaphragm. Since you would also have a loss of energy from various objects the output would actually be less. So I don't see any reason of doing this.
Posted By: DYohn
Date Posted: November 18, 2009 at 8:21 AM
comfy_shoes wrote:
what if I used a diaphram at the one end?
That would create a bandpass enclosure. ------------- Support the12volt.com
Posted By: i am an idiot
Date Posted: November 18, 2009 at 8:25 AM
I don't think that would be a bandpass. It would just be a passive radiator powered by a woofer without the benefits of the woofer. The radiator would make sound because the woofer is making it move. But wasting the energy that the woofer would normally produce. EDIT: I could have saved a lot of typing had I read Whiterob's post before I typed it. So in short, What WhiteRob said.
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