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

Loudspeaker placement
Loudspeaker placement
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 25th January 2003, 10:48 AM   #1
djdan is offline djdan  Romania
diyAudio Member
 
Join Date: Dec 2001
Location: Romania
Default Loudspeaker placement

Why when put the loudspeaker down on the floor or in the room corner, we have a signifiant improvement for bass fequencies ?
  Reply With Quote
Old 25th January 2003, 01:20 PM   #2
cocolino is offline cocolino  Germany
diyAudio Member
 
cocolino's Avatar
 
Join Date: May 2002
Location: Bavaria (south of veal sausage equator)
Default improvement?

You have a boost towards lower frequencies due to room gain but I would not say it is an improvement putting the speakers in the corners.
The reason for room gain is twofold. One is "spatial loading" (see link) the other is reflection.
Depending on frequency and position of the speaker in the room, the gain can be significantly.

http://www.trueaudio.com/st_spcs1.htm

BUT:
This way all the room modes (resonant frequencies) getting most excited. This modes usually have a long decay time (ringing) and this sounds not so good (better try to avoid exciting room modes).
Some constructions though benefit from placing the woofers near the floor and can lead to flatter frequency response in the "upper" bass range (~100-300Hz) as this position compensates for baffle step drop of SPL.
Regarding room modes the position near the floor is not so bad compared to corner placement. The worst You can do (IMO) is placing the woofers near the floor AND in the corners.

There are tons of information about that on the net:
Just do a google search for "Room Acoustics", "Baffle Step", "Room Gain" "half-space" "full-space" (radiation), "Spatial Loading" and You`ll find plenty to read and learn.
__________________
Christoph
STEAL the BEST - INVENT the REST
  Reply With Quote
Old 25th January 2003, 05:03 PM   #3
djdan is offline djdan  Romania
diyAudio Member
 
Join Date: Dec 2001
Location: Romania
Thank you Cocolino !

Yes , the term " improvement" is not so well chose . Maybe the term " more " will be more precise.
  Reply With Quote

Reply


Loudspeaker placementHide 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
DIY loudspeaker vs. factory built loudspeaker keyser Multi-Way 137 28th November 2019 06:05 AM
Placement lpd Planars & Exotics 0 21st August 2008 12:39 AM
sub placement chainenoble Subwoofers 3 13th October 2006 04:45 AM
Placement of PR on a sub box Stantob Subwoofers 5 16th January 2006 11:21 PM


New To Site? Need Help?

All times are GMT. The time now is 08:16 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki