Spherical Speakers - 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 19th December 2007, 05:06 PM   #1
diyAudio Member
 
Join Date: Dec 2007
Default Spherical Speakers

Hi,

I am planning on building a pair of spherical speakers using W3-871SC Full Range drivers. I know a sphere front and a tapered tube for the back is better than a sphere but I'm going with the sphere because of how I want it to look. I want to know if porting it would be practical instead of leaving it sealed. Also what method should I use to reduce resonances? The internal diameter will be 8-1/2 inches. I will use Tuf Cal plaster as the enclosure material.
  Reply With Quote
Old 20th December 2007, 02:33 PM   #2
diyAudio Member
 
Join Date: Dec 2004
I used Jordan JX92s in a sealed 3 litre enclosure to create my spheres. Though I got the enclosures hand turned out of American Black Walnut [beyond my skill]

They sound excellent when positioned near a wall, and with a matching sub woofer do justice to any CD or DVD !

I found that porting wasn't really necessary [and would have been difficult in such a small enclosure]

The shape itself tends to reduce any sort of problem with resonance, and stuffing it lightly with polyester wool gives good results with the mid range.

Good luck with your spheres, post some images when your done !!!
Attached Images
File Type: jpg highball-stand.jpg (49.3 KB, 778 views)
  Reply With Quote
Old 20th December 2007, 06:01 PM   #3
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

I get around 4 litres for your sphere. Zaphs measurements for
3" drivers all have Vas < 1 litre and ~ 1/2 specified values.
Reflexing is pointless with typical Qts values. 2L to 3L sealed.

W3-871s over bright.

/sreten.

P.S. I have a zipped file for Zaph's article.
Attached Images
File Type: gif audio-speaker11-xover-lowdiffraction.gif (3.2 KB, 657 views)
  Reply With Quote
Old 20th December 2007, 06:47 PM   #4
diyAudio Member
 
Join Date: Dec 2007
Beautiful speakers smallangryboy. And thanks for the advice from both of you. I used win isd to get the Vb of my enclosure then I used a calculator I made to calculate the same size sphere that would need to give me that internal volume. I asumed that this program was accurate but I don't know. I noticed that win isd takes into acount measurements from small speakers more accurately than many online calculators that just aproximate the measurements for smaller speakers based on some kind of size limit. ex. smaller than 4 or 5 inches.
  Reply With Quote
Old 20th December 2007, 07:43 PM   #5
TNT is offline TNT  Sweden
diyAudio Member
 
TNT's Avatar
 
Join Date: Apr 2003
Location: Sweden
Ikea ? :-)

http://www.diyaudio.com/forums/showt...942#post989942

/
  Reply With Quote
Old 21st December 2007, 02:00 AM   #6
diyAudio Member
 
Join Date: Dec 2007
Awesome. What did you use to make them?
  Reply With Quote
Old 21st December 2007, 02:23 AM   #7
diyAudio Member
 
GuyPanico's Avatar
 
Join Date: Mar 2005
Location: Euless, TX
My little spheres

A few pics of my finished B3N mini spheres
  Reply With Quote
Old 21st December 2007, 05:15 AM   #8
diyAudio Member
 
Join Date: Dec 2007
Nice!

Made out of bowls from Target eh. I thought about using some bowls from under our sink today as making them with plaster would take too long (because of waiting for the plaster to be delivered). And cost much more than I really want to spend. I'm sure someone would have been angry if I did.lol
  Reply With Quote
Old 21st December 2007, 09:22 AM   #9
diyAudio Member
 
Join Date: Dec 2004
TNT

Lovely ! I wanted to make a matching sub woofer fro my spherical speakers, but couldn't get over the logistics , do you have some instructions about how you went about making your metal enclosure, and a parts list
  Reply With Quote
Old 21st December 2007, 12:11 PM   #10
el`Ol is offline el`Ol  Germany
diyAudio Member
 
Join Date: May 2005
Location: Bavarian Forest
Not mine, found them in the Manger DIY zone:
Attached Images
File Type: jpg diy_kunden_keller_2_gr.jpg (60.4 KB, 619 views)
  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
Spherical speakers and all that jazz cirrus18 Multi-Way 59 6th March 2009 05:31 PM
Spherical Arrays...? klocwerk Multi-Way 18 5th May 2007 10:08 AM
Spherical horns AuroraB Multi-Way 17 10th October 2006 03:32 PM
spherical enclosure MrSensitive Subwoofers 94 6th March 2006 08:06 AM


New To Site? Need Help?

All times are GMT. The time now is 04:34 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