Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

newguy, but whats is the REAL volume in there?
newguy, but whats is the REAL volume in there?
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
Thread Tools Search this Thread
Old 1st May 2008, 07:10 PM   #1
RVjupiter is offline RVjupiter  United States
diyAudio Member
Join Date: May 2008
Default newguy, but whats is the REAL volume in there?

fist time caller to the show.
it's wonderful to find a total wealth of information here, and i am still new to the DIY sound concept with a question about the real volume in the cabinet.

how much space is really taken up by the extracurricular components, and is it really something to worry about or not? If the math comes out with a perfect .5 cubic foot box for my needs, and then i put an internal brace, a crossover, wires, and the tweeter motor takes up some space...well what am i left with? and if i'm shooting for as perfect as i can get, wouldn't i want to compensate slightly in box measurements? i'm just trying to get as much as possible with what I got. i did some searching under various terms and came up nothing.
am i splitting hairs?

my project is going to be something nice and bookshelf-ish but i will be mounting the tweeter (a very good one, not the HiVi.) separately on top in its own padded small enclosure (to dampen its own returns and not be interfered with by the driver and it's waves.) in plane with the driver cone center. i just think it's more efficient that way.
  Reply With Quote
Old 1st May 2008, 07:26 PM   #2
Godzilla is offline Godzilla  United States
diyAudio Member
Godzilla's Avatar
Join Date: Nov 2005
Location: New York
When adding bracing i always figure it takes away a bit of volume when i calculate. I usually just round off a little. When you use a program like WinISD you will see slight variations in volume do not really change the response you get from a speaker. Enjoy.
  Reply With Quote
Old 1st May 2008, 08:28 PM   #3
Lsharptec1 is offline Lsharptec1  United States
diyAudio Member
Lsharptec1's Avatar
Join Date: Oct 2004

Godzilla makes a good point.

I usually add 10% to the total box volume for braces, crossover network, etc.

Zilla, it's great to have you back, stomping Tokyo flat.

  Reply With Quote
Old 2nd May 2008, 10:36 AM   #4
Svante is offline Svante  Sweden
diyAudio Member
Svante's Avatar
Join Date: Feb 2004
Location: Stockholm
The volume taken up by driver, vent, bracing etc should be removed to get the effective volume of the box. Then this volume should be increased a bit if there is damping material in the box (that has an isothermalizing effect). These two things counteracts one another, and compensating for just one of them might actually turn out worse than skipping it all.

...then again one should be aware about how small effect these small box volume changes has on the frequency response. Typically it turns out that the difference is rather small, within a dB or so.
Simulate loudspeakers: Basta!
Simulate the baffle step: The Edge
  Reply With Quote


newguy, but whats is the REAL volume in there?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
So whats the real deal with behringer ep-2500 saabracer23 Instruments and Amps 28 12th December 2013 07:05 PM
Volume control on DVD player remote. Lose resolution at low volume? Circlotron Digital Source 2 10th June 2011 07:20 PM
Swichable source and volume pot. Whats the best way? sounder Chip Amps 2 22nd September 2003 06:29 PM
Combing effects: How real in "real" rooms? smeade1079 Multi-Way 3 10th March 2003 12:32 AM

New To Site? Need Help?

All times are GMT. The time now is 03:59 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio