Foam Core Board Speaker Enclosures? - Page 58 - 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 11th December 2012, 02:10 PM   #571
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 11th December 2012, 02:15 PM   #572
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
You can blame me if you like but I put the blame squarely on the shoulders of xrk. He showed me how to make a really cool set of speakers, that have a high WAF, were quick as the dickens, allowed me to do much of the work in my condo, are a design I have been pondering for years, and end up sounding great.

Expert my ***. I'm still on the first rung of that ladder.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 11th December 2012, 02:19 PM   #573
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
yeah, I agree, it's Cal's fault!
  Reply With Quote
Old 11th December 2012, 02:52 PM   #574
diyAudio Member
 
Join Date: Mar 2011
Quote:
Originally Posted by overtheairbroadcast View Post
Me: "They make for really good speakers you can hang on the wall Honey... and he is an expert."
You could have added: "Moreover, dear, he said is better than viagra..."
  Reply With Quote
Old 11th December 2012, 02:54 PM   #575
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Quote:
Originally Posted by overtheairbroadcast View Post
Thanks Cal. No, really. Thanks.

My wife: "Where were you? The kids wanted to say good-night to you and what is ALL that you're carrying?"
Me: "I was at the Dollar-rama and this is 16 sheets of Readi-Board."
My wife: "Ready-Board? Why Ready-Board?"
Me: "Yes, Ready-Board and because my friend Cal says that I need it."
My wife: "Cal?!?!? Who is Cal? WAIT! Don't tell me. It has something to do with your amplifier thing?"
Me: "Sort of... it is for the speakers. It was cheap. Dollar-rama you know... and Cal knows his speakers. He's a bona fide expert. And he's Canadian too."
My wife: "Canadian too? So he's not even in this province? And you went out and bought Ready-Board because a guy who told you to?"
Me: "They make for really good speakers you can hang on the wall Honey... and he is an expert."

Well, 16 sheets... it is a start.
Overtheair, Great to see we have a new start! Whowouldathunk that readiboard from Dollarama can provide so much listening enjoyment?
Good thing your wife didn't say who's this Cal or Calista or whatever her name is you met on the internet...
Good luck with your build. Are you doing an all foamcore board 20 incher or the larger wood faced 70 cm?
  Reply With Quote
Old 11th December 2012, 03:35 PM   #576
diyAudio Member
 
Join Date: Jan 2012
Location: Canada
Quote:
Originally Posted by xrk971 View Post
Overtheair, Great to see we have a new start! Whowouldathunk that readiboard from Dollarama can provide so much listening enjoyment?
Good thing your wife didn't say who's this Cal or Calista or whatever her name is you met on the internet...
Good luck with your build. Are you doing an all foamcore board 20 incher or the larger wood faced 70 cm?
I am probably going to go somewhere between 50 cm and the full 70 cm and experiment just sort of because I have too many projects to finish first (a KT-88 SE, the Amp Camp, and LM1875 amplifier projects and re-capping a SX-780, Quad 303, and maybe even re-capping a Sansui B-1000 for giggles). The workbench bench needs clearing and any of these ought to be able to power the speakers sufficiently.

What caught me with this was two things; my once every blue moon bug Cal with a PM to see whatelse I can learn (and he pointed me to the "Foam Core Speaker Enclosure?" thread) and that I have four rather nice looking Pioneer 3 inch surround sound speakers I salvaged from a ready to run boxed system. From there, I was going to consider maybe liberating a pair of 4 inch Tang Band bamboo speakers from my friend for $50 and cutting out the hole bigger and possibly using an adapter if I want to go backwards.

I have enough 1/4 inch 3 ply floorboard, a couple of tubes of Alex Plus, and Varathane, leftover from my make my wife happy downstairs bathroom reno I did last year and I will see where that leads me.


One question though that has been kind of bugging me though... with this being a single full range driver, why is there no snubber thing-a-majiggy on the back end where other single full range driver speakers often do?
  Reply With Quote
Old 11th December 2012, 04:07 PM   #577
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Default Son of Cornucopya

I got to put the micro Cornucopya (14 in square) in my room and it sounds great! Even with stock Logitech amplifier powering it. It seems to be much louder than stock enclosures, and certainly the richness of the music and enhanced bass is so much better. I leaned it against the window and noticed something very cool: it is translucent and you can clearly see the spirals. Maybe a window suction cup hanger would be the way to mount these guys...
Attached Images
File Type: jpg cornucopya-seethru2-847874914.jpg (93.9 KB, 405 views)

Last edited by xrk971; 11th December 2012 at 04:21 PM.
  Reply With Quote
Old 11th December 2012, 04:15 PM   #578
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Quote:
Originally Posted by overtheairbroadcast View Post
I am probably going to go somewhere between 50 cm and the full 70 cm and experiment just sort of because I have too many projects to finish first (a KT-88 SE, the Amp Camp, and LM1875 amplifier projects and re-capping a SX-780, Quad 303, and maybe even re-capping a Sansui B-1000 for giggles). The workbench bench needs clearing and any of these ought to be able to power the speakers sufficiently.

What caught me with this was two things; my once every blue moon bug Cal with a PM to see whatelse I can learn (and he pointed me to the "Foam Core Speaker Enclosure?" thread) and that I have four rather nice looking Pioneer 3 inch surround sound speakers I salvaged from a ready to run boxed system. From there, I was going to consider maybe liberating a pair of 4 inch Tang Band bamboo speakers from my friend for $50 and cutting out the hole bigger and possibly using an adapter if I want to go backwards.

I have enough 1/4 inch 3 ply floorboard, a couple of tubes of Alex Plus, and Varathane, leftover from my make my wife happy downstairs bathroom reno I did last year and I will see where that leads me.


One question though that has been kind of bugging me though... with this being a single full range driver, why is there no snubber thing-a-majiggy on the back end where other single full range driver speakers often do?
What do you mean by snubber? The cone that we have been discussing? I think Don is right in that the cone dimension is too small to matter and the magnet is in the way. Or do you mean stuffing - I have dense stuffing in driver cavity, and into first several inches of throat on bigger one. $50 for four TB bamboos is a good deal. From the specs I think that driver will work well as you want something with a hot top end. What is neat about this project is that it is so cheap and fast, you are not afraid to throw whatever driver you have lying around. Like I did with the no-name Logitech 2 in drivers from my old pc speakers. The Pioneers from your old HT-in-a-box could work really well too.
Good luck.
  Reply With Quote
Old 11th December 2012, 04:20 PM   #579
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Quote:
Originally Posted by xrk971 View Post
What do you mean by snubber?
I think he means Zobel.


BTW, the backlight spirals look awesome!!!
  Reply With Quote
Old 11th December 2012, 04:26 PM   #580
diyAudio Member
 
Join Date: Jan 2012
Location: Canada
The baffle step correction circuit is what I mean... Is it called a Zobel? I had better read up some more.

And yes, the speakers look quite nice against the window. Another question though just popped up, would you be treating the enclosure with some kind of varnish or coating since it is paper and so close to a window (condensation, water, humidity)?

And the bamboo TBs is only a pair... the Pioneer surrounds were the 4 speakers (a pair unshielded and other pair shielded -- there was one more that died a horrible death while being used as a test speaker).
  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 12:58 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