How do you check for leaks? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 9th January 2003, 03:03 AM   #1
diyAudio Member
 
Join Date: Nov 2002
Location: South Australia
Question How do you check for leaks?

Ive recently built a subwoofer for my home theatre using a shiva driver. I am really happy with the result, and am currently hunting all the things vibrating in the room to eliminate them! (damn those steel frame homes!)
Anyway, when I built the sealed enclosure, I used generous amounts of silicon at every joint (and waited for it to cure before I installed the driver). I used 25mm MDF with 16mm bracing. I also mounted the amplifer separate to the main box.

I was just wondering what the best method is to test for any leaks. I keep hearing how important this is but dont hear anything about how to test for it after the box is built.

Any suggestions??
  Reply With Quote
Old 9th January 2003, 03:15 AM   #2
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Minor leaks in a closed box are not tragic. If the impedance curve comes out where you want it, you're probably OK. If not, you can run an infrasonic signal to the sub (maybe 10 Hz or so) at a moderate excursion, then wet your lips and move your mouth around the joints of the box (keeping it a cm or so away!). You'll feel any air leaks. Just don't let anyone see you do this 'cause it looks so silly. Works, though.

Alternatively, you can do the same thing with a stethascope, but I think the wet lip thing works better.
  Reply With Quote
Old 9th January 2003, 03:32 AM   #3
Ilianh is offline Ilianh  Canada
diyAudio Member
 
Ilianh's Avatar
 
Join Date: Oct 2002
Location: Montreal, Canada
Send a message via MSN to Ilianh
Immerge it in water, and see for air bubbles.








btw.. it was a joke (just to make sure) what SY said is about the best method..
  Reply With Quote
Old 9th January 2003, 03:49 AM   #4
diyAudio Member
 
Join Date: Nov 2002
Location: South Australia
Well I gotta admit I would’ve never guessed the wet lips method!
I’ll give it a go but I gotta be careful coz I got aluminum sheets stuck on all sides!

I was thinking of somehow surrounding it in smoke and seeing whether any leaks created movement. Could I try dry ice or do I have to crack open the cubans?
Actually we test for gas leaks here at work with soapy water, but I reckon that sounds a bit messy.
My main concern is around the driver itself because that was the last thing I installed and hence I couldn’t seal it from the inside.
Attached Images
File Type: jpg dscn0530.jpg (7.8 KB, 332 views)
  Reply With Quote
Old 9th January 2003, 04:16 AM   #5
diyAudio Member
 
FrankDIY's Avatar
 
Join Date: Mar 2001
Location: Quebec City
In my case, I put so much glue that it can not leak
__________________
Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert Einstein
FrankDIY's Audio Corner
  Reply With Quote
Old 9th January 2003, 04:19 AM   #6
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
Easy. Hold a candle flame near any supect joints. If the flame jumps, you've got a leak.

Grey
  Reply With Quote
Old 9th January 2003, 05:29 AM   #7
Banned
 
Join Date: Nov 2002
Location: Adelaide, Australia
Send a message via MSN to SkinnyBoy
Ummmm what can I sugest... I know.. don't look for leaks, seal them, even if they are not there. . hmm, not sure how that works of a metal covered box, perhaps making sure it was sealed should have been don't first..
  Reply With Quote
Old 9th January 2003, 06:03 AM   #8
BrianGT is offline BrianGT  United States
diyAudio Moderator Emeritus
 
BrianGT's Avatar
 
Join Date: Jan 2002
Location: near Atlanta, GA
Send a message via AIM to BrianGT
Quote:
Originally posted by SkinnyBoy
Ummmm what can I sugest... I know.. don't look for leaks, seal them, even if they are not there. . hmm, not sure how that works of a metal covered box, perhaps making sure it was sealed should have been don't first..
I found a leak in my tempest ported ebs enclosure when I was playing a 10hz wave at full power on a 250w plate amp. I had put a screw in the bottom to secure the two 3/4" baltic birch plywood pieces together when gluing, and forgot to plug it. It was quite noticable.

It is amazing how much stuff that 20hz can shake in my apartment. It makes the walls resonate. I did some frequency sweeps with a tone generator, and it seemed to find the resonant frequencies of everything in my apartment. Definately too big of a sub for a small apartment.

--
Brian
  Reply With Quote
Old 9th January 2003, 06:04 AM   #9
diyAudio Member
 
seangoesbonk's Avatar
 
Join Date: Jan 2002
Location: Vancouver, BC, Canada
You could use the smoke from a stick of insence, to avoid putting an open flame close to your speakers.

Of course then your speakers might smell like one of those damn hippies...
__________________
My girlfriend's sub is bigger than mine...
  Reply With Quote
Old 9th January 2003, 06:06 AM   #10
BrianGT is offline BrianGT  United States
diyAudio Moderator Emeritus
 
BrianGT's Avatar
 
Join Date: Jan 2002
Location: near Atlanta, GA
Send a message via AIM to BrianGT
Quote:
Originally posted by seangoesbonk
You could use the smoke from a stick of insence, to avoid putting an open flame close to your speakers.

Of course then your speakers might smell like one of those damn hippies...
those damn hippie subwoofers!!!

--
Brian
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Transformer Hum leaks to Speakers kff322 Tubes / Valves 16 18th January 2007 12:01 AM
Air leaks in horns xcortes Multi-Way 6 20th August 2004 05:48 PM
Arrggg Leaks!!! RyanC Multi-Way 10 6th June 2004 01:42 AM
Searching for Leaks (aka !@#$) Nappylady Multi-Way 8 21st February 2003 12:59 AM


New To Site? Need Help?

All times are GMT. The time now is 09:28 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2