So, what exactly does a compression chamber do?? - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 4th February 2006, 08:44 PM   #1
NV&H is offline NV&H  United States
diyAudio Member
Join Date: Feb 2005
Location: Charlotte, North Carolina
Default So, what exactly does a compression chamber do??

Can someone please explain the theory and function of a compression chamber? Why do horns need them?
  Reply With Quote
Old 4th February 2006, 09:29 PM   #2
GM is offline GM  United States
diyAudio Member
GM's Avatar
Join Date: Jun 2003
Location: Chamblee, Ga.

Well, first and foremost, it protects the very fragile diaphragm if required. Second, it keeps the driver from comb filtering with itself. Third, it can be used to reactance annull the horn (apply the right amount of acoustic compliance to offset the horn's air mass loading) to obtain peak performance down to Fc.

Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 5th February 2006, 12:40 AM   #3
Mark Kravchenko
diyAudio Member
mwmkravchenko's Avatar
Join Date: Jan 2002
Location: Perth Canada
Default Two more cents

In a rear loaded horn the compression chamber acts as a capacitance to create a high pass filter if used as a chamber behind a driver that has the cone radiating into the air.

A capacitance blocks low frequencies at the rate of 6db/octave below the corner frequency. The corner frequency is determined by the size of the chamber.

  Reply With Quote


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
Compression ratio and diaphragm size in compression drivers inkasound Multi-Way 50 8th January 2009 03:38 PM
front loaded bass horn without rear compression chamber? paulspencer Subwoofers 9 28th October 2005 04:53 PM
Compression Chamber Size mrlots2do Full Range 29 17th August 2005 06:02 PM
Why, horn, compression chamber? tade Subwoofers 8 28th April 2005 06:04 AM
Separated or Same Chamber Box? suprastar17 Subwoofers 2 19th April 2005 02:32 PM

New To Site? Need Help?

All times are GMT. The time now is 08:40 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2