quick question about SDX10 - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > CSS

CSS Creative Sound Solutions (CSS) is a service-oriented provider of high-value speaker components for the DIY loudspeaker builder

Reply
 
Thread Tools Search this Thread
Old 9th October 2011, 12:50 AM   #1
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
Default quick question about SDX10

I bought a couple of SDX10s,

I just need to find out what the volume of the driver is, so i can subtract it from my box calculation.
  Reply With Quote
Old 10th October 2011, 07:12 AM   #2
diyAudio Member
 
Join Date: Sep 2011
Hey Neutron , perhaps tis could help ??


Speaker Driver Displacement Calculator

Speaker Driver Displacement Calculator Help
  Reply With Quote
Old 10th October 2011, 04:58 PM   #3
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
That's perfect, thanks, I am glad you pointed that out, my guess was off by quite a bit.
  Reply With Quote
Old 13th October 2011, 05:21 PM   #4
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by neutron7 View Post
That's perfect, thanks, I am glad you pointed that out, my guess was off by quite a bit.

Did you mean the (net internal) physical volume the driver would occupy within the enclosure? As the calculator appears to not consider the cast frame, etc (which on the CSS woofers and other biga$$ woofers are quite substantial), that could certainly be a different figure - your initial estimate might be closer than the calculator suggests?
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  Reply With Quote
Old 13th October 2011, 05:37 PM   #5
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
I thought about that, and the fact that the magnet is hollow, so i guessed they would cancel out, but i added a half liter anyways, which i can always fill with something if it screws up the tuning too much.
  Reply With Quote
Old 13th October 2011, 06:07 PM   #6
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by neutron7 View Post
I thought about that, and the fact that the magnet is hollow, so i guessed they would cancel out, but i added a half liter anyways, which i can always fill with something if it screws up the tuning too much.
Why would the "hollow" magnet ( vented for voice coil ) make that much difference? - there's much more "free-air" inside the support arms and cone/rear spider. An easy rule of thumb for a driver of this type is to estimate the internal volume as that of a cylinder the diameter of magnet.

But in any case, the real question might well be what enclosure design did you have in mind? A single of these would work quite well in a simple sealed approx 40liters, (~1.5 ft^3) - just be sure to allow for bracing, including a magnet support if possible - these are very substantial drivers and will definitely benefit from all the bracing you can incorporate.
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  Reply With Quote
Old 13th October 2011, 08:23 PM   #7
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
I thought the air space in the the hollow magnet would make up (roughly) for the additional volume of the basket compared to a stamped one, which i am guessing that calculator was made for.

using the rule of thumb cylinder calculation gives almost double what the calculator does.

Anyways, today i modeled the cone, magnet, and basket roughly in 3ds MAX, (which has a tool to calculate the volume of things) and it came to roughly 2.1L. closer to the calculator (1.5L) than the cylinder rule of thumb (3L) that is if the cylinder is supposed to be the depth of the driver, i wasnt quite clear on that.

the enclosure is sealed, 24 liters as suggested in the SDX10 PDF. I know its a bit small but that's about as big as i can realistically go (studio monitors). and it has bracing but no magnet support. (i could change that)

they will be crossed over with miniDSP board, so i will be able to use some equalization with that as well.

Last edited by neutron7; 13th October 2011 at 08:28 PM.
  Reply With Quote
Old 13th October 2011, 08:40 PM   #8
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by neutron7 View Post
I thought the air space in the the hollow magnet would make up (roughly) for the additional volume of the basket compared to a stamped one, which i am guessing that calculator was made for.

using the rule of thumb cylinder calculation gives almost double what the calculator does.

Anyways, today i modeled the cone, magnet, and basket roughly in 3ds MAX, (which has a tool to calculate the volume of things) and it came to roughly 2.1L. closer to the calculator (1.5L) than the cylinder rule of thumb (3L) that is if the cylinder is supposed to be the depth of the driver, i wasnt quite clear on that.

the enclosure is sealed, 24 liters as suggested in the SDX10 PDF. I know its a bit small but that's about as big as i can realistically go (studio monitors). and it has bracing but no magnet support. (i could change that)

they will be crossed over with miniDSP board, so i will be able to use some equalization with that as well.

I've not worked with this driver, but have done with the( much smaller) SDX7 which thrives in very small sealed enclosure, so all theorizing aside, you may well be fine with the 24 liters. Magnet support could be as simple as sitting on a small block of material. With the driver's prodigious power handling ability, and adequate power to support any necessary EQ, you should be able to move some air.

have fun
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  Reply With Quote
Old 13th October 2011, 08:54 PM   #9
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally Posted by neutron7 View Post
Anyways, today i modeled the cone, magnet, and basket roughly in 3ds MAX, (which has a tool to calculate the volume of things) and it came to roughly 2.1L. closer to the calculator (1.5L) than the cylinder rule of thumb (3L) that is if the cylinder is supposed to be the depth of the driver, i wasnt quite clear on that.
I take the cylinder only as far as the back of the baffle, which with a double baffle as recommended for SDX10, would be 36-38 mm less than the height of the driver. With the SDX10 i'd probably also consider the last bit of the magnet that is a shallow cone seperately.

Quote:
the enclosure is sealed, 24 liters as suggested in the SDX10 PDF. I know its a bit small but that's about as big as i can realistically go (studio monitors). and it has bracing but no magnet support. (i could change that)
I have SDX10 for a pair of push-push woofers. So far the plan is to do a sealed 15" square cyclinder of 50-60 litres heavily stuffed with ultratouch. Do install braces. And i'd recommend BB.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 18th October 2011, 05:57 PM   #10
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
if you haven't already got the box finished, bracing/support for the magnets could be as simple as a square block or curved saddle - these are heavy drivers
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  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
quick question. timwebb Car Audio 2 29th July 2011 02:49 AM
Dual CSS SDX10 Sub Construction Westy37 Subwoofers 7 6th September 2010 02:07 PM
Music sub -2 sdx10 or 1 sdx15 ? Bfpca Subwoofers 18 10th June 2010 06:29 PM
SDX10 in 24L sealed sub build sam xt Subwoofers 21 15th February 2010 12:01 AM
Quick quick question ! guitvinny Pass Labs 6 7th February 2007 04:20 PM


New To Site? Need Help?

All times are GMT. The time now is 02:46 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