Foam Core Board Speaker Enclosures? - Page 70 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 13th December 2012, 08:48 PM   #691
diyAudio Member
 
Join Date: May 2009
Location: Wellington
Quote:
Originally Posted by xrk971 View Post
Yes, I have seen other "Box" speakers wrapped in matching upholstery or drape cloth (glued on with PVA). ...
Good point. You can make the driver "disappear".

Step 1: Cover the front panel with a layer of thick cardboard or thin foamboard, just thick enough so that the driver sits flush or just below the surface. Or, glue a small bead around the front edge so that the covering (next step) is lifted slightly up off the panel, as is done with painters' canvases when mounted on wooden frames.

Step 2: Stretch acoustically transparent cloth (curtain netting, "stocking material", lycra stretch fabric) around the speaker and fasten it (glue, staples) to the back panel. The cloth can be coloured / patterned, or you can paint it with fabric paint.
  Reply With Quote
Old 13th December 2012, 08:50 PM   #692
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Klampy,
It all depends on how efficient your drivers are vs woofers. If you biamp, you can balance easier. My experience with 2 inch and even 3.5 in FR drivers is that they don't need a tweeter. You need to get drivers with published specs or it can be a lot of time wasted especially for a big wall of sound build.
  Reply With Quote
Old 13th December 2012, 08:53 PM   #693
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Quote:
Originally Posted by von.ah View Post
No option for DIYing in the foreseeable future. I barely have time to just sit and listen to music on my two home systems. It's all armchair quarterbacking for me currently.
As ST has shown, one who is good with a razor and hot melt glue gun can bang these out in less than 2 hrs. My record is 80 minutes on my second 14 inch spiral. So do what I do and sleep less!
  Reply With Quote
Old 13th December 2012, 09:06 PM   #694
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Quote:
Originally Posted by xrk971 View Post
So do what I do and sleep less!
Your wife will thank you. Soon she will appreciate the influence diyaudio has on you.
  Reply With Quote
Old 13th December 2012, 09:08 PM   #695
diyAudio Member
 
Join Date: Dec 2010
Location: Coffs Harbour NSW 2450
Quote:
Originally Posted by xrk971 View Post
Klampy,
It all depends on how efficient your drivers are vs woofers. If you biamp, you can balance easier. My experience with 2 inch and even 3.5 in FR drivers is that they don't need a tweeter. You need to get drivers with published specs or it can be a lot of time wasted especially for a big wall of sound build.
yep, the horn i posted is with drivers i have specs for, i just have to buy them. lol

and bi-amping isnt really an option at this point, altho i really probably should. i have a pair of car amps i could certainly use for this.. its the power supply i might have issues with..... hmmm now you have me thinking...
__________________
  Reply With Quote
Old 13th December 2012, 09:17 PM   #696
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
I have an old Sony car audio amp, a tiny 25 w per channel but the thd specs are very good. It was in the bottom of my tool box for 15 years sitting there unused until I thought about all the laptop PS bricks I have lying around. I hooked it up to a 19v 4.6 amp brick fom an old Dell. Connected my old Boston Acoustics HD5's plugged in my ipod and wow, that thing seriously is loud and clean without distortion. I think the 25 w was based on 12 volts. Since I am overdriving it with 19 v, probably getting more. You run the risk of frying your electrolytic caps but hey what the heck.... Short story is, use laptop power supplies. They are plenty and cheap. Give the car audio biamping a try. Use car audio active crossovers too. External hard drives use 12 v 2 amp bricks. That will work if you are too timid to try the 19v but cant get much more than 2 to 3 amps for cheap.

Last edited by xrk971; 13th December 2012 at 09:21 PM.
  Reply With Quote
Old 13th December 2012, 09:20 PM   #697
diyAudio Member
 
Join Date: Dec 2010
Location: Coffs Harbour NSW 2450
see.. this is why DIY is a bad influence... haha.
its a shame i just threw out two LaptopPSUs when i moved house...
__________________
  Reply With Quote
Old 13th December 2012, 09:33 PM   #698
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Quote:
Originally Posted by klampykixx View Post
see.. this is why DIY is a bad influence... haha.
its a shame i just threw out two LaptopPSUs when i moved house...
Are you referring to trading sleep for speaker building?
  Reply With Quote
Old 13th December 2012, 09:33 PM   #699
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
I just did a quick calculation of time and materials [incl taxes]:

If I bought everything:
$370
Actually spent for this project:
$150
Hours:
18
Days to complete:
10
Posts in this thread:
137
Satisfaction:
Priceless
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 13th December 2012, 09:41 PM   #700
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Cal,
Thanks For sharing the true cost of your speakerholism
Good thing you had drivers already...

My cost on 20 inch minis
$32 drivers including s/h
$6 for foam boards
$1 gluesticks
Free old pillow stuffing
Free spare speaker wiring ( actually old alarm system 4 conductor cable)
8 hrs time
3 days to complete

But then I did not spend any time decorating it

Cost on 14 inch micros
Free old Logitech s120 drivers and amp
$3 in foam boards
$1 gluesticks
4 hrs time
3 days to build

Last edited by xrk971; 13th December 2012 at 09:45 PM.
  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
Speaker damping: Foam or expanding foam akunec Multi-Way 4 11th February 2014 01:14 AM
Replace speaker foam with this odd material? flyingsquirrelman Subwoofers 7 25th July 2010 01:32 PM
concrete board for enclosures? alandarkdale Multi-Way 6 31st March 2007 08:35 AM
Foam core construction for subwoofers morbo Subwoofers 19 30th August 2005 08:09 PM
speaker foam dave k Multi-Way 2 24th June 2003 05:05 AM


New To Site? Need Help?

All times are GMT. The time now is 11:16 PM.


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