Double bass-reflex enclosure. - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 20th October 2011, 03:54 PM   #1
diyAudio Member
 
Join Date: Mar 2010
Default Double bass-reflex enclosure.

I am curious to know whether single 18" double bass reflex enclosures would be any good for outdoor djing and p.a uses if possible.I know they may turn out to be very large but just curious and which software can best model these with drivers and port front-facing.
  Reply With Quote
Old 20th October 2011, 05:08 PM   #2
Tytte71 is offline Tytte71  Norway
diyAudio Member
 
Join Date: Oct 2010
Quote:
Originally Posted by simpleacoustic View Post
I am curious to know whether single 18" double bass reflex enclosures would be any good for outdoor djing and p.a uses if possible.I know they may turn out to be very large but just curious and which software can best model these with drivers and port front-facing.
I am not experienced with djing or PA, but the answer depends very much on what you want to acheive. For less crowded areas with limited distance to the crowd - why not?
If you for example take BMS 18N860 and use it in a 250 net litre BR cabinet and tune it to 23Hz, it could produce some 117dB/1m/1500W outdoor, baffle step diffraction loss taken into account. It's capacity extends relatively flat down to 23Hz and without getting outside xmax at 20Hz. That should leave you some 110dB "distortion free" average sound pressure level and low frequency electronic music should be no problem. It could off course be driven harder, but then outside its (by definition) linear operating range. Add another sub and you gain 6dB of maximum sound pressure - four subs +12dB and so on
By the way... this would also make a very nice sub for home use.

A free and easy to use Excel tool is Kristian Ougaard's Unibox
  Reply With Quote
Old 20th October 2011, 07:57 PM   #3
diyAudio Member
 
Join Date: Oct 2011
Location: East Texas
Quote:
Originally Posted by simpleacoustic View Post
I am curious to know whether single 18" double bass reflex enclosures would be any good for outdoor djing and p.a uses if possible.I know they may turn out to be very large but just curious and which software can best model these with drivers and port front-facing.
..hmm...come to think of it, I have never heard or seen anyone use a double bass reflex cab of any sort(that I am aware of). I am definately curious about the outcome of this thread...how is the efficiency with such a critter?
  Reply With Quote
Old 20th October 2011, 08:35 PM   #4
Tytte71 is offline Tytte71  Norway
diyAudio Member
 
Join Date: Oct 2010
Oh, thanks Quackhead... Didn't catch that the question was regarding double chambered bass reflex enclosure.
Then my answer is turned into a question, why not pick a proper designed driver with high xmax that does the job in a simpler box?
  Reply With Quote
Old 20th October 2011, 09:04 PM   #5
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
You might want to have a read of this article by Claudio DCR

As far as I am aware the overall size of this style of DCR is no more than it would be for a single chamber bass reflex. The main advantage of DCR that I have seen mentioned is lower distortion.

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  Reply With Quote
Old 20th October 2011, 09:22 PM   #6
diyAudio Member
 
Join Date: Mar 2010
What about the RCF L18P300-It's popularly used for p,a here but never seen in this type of enclosure...Ts here
http://http://www.rcf.it/products/precision-transducers/low-frequency-transducers/l18p300
  Reply With Quote
Old 20th October 2011, 09:51 PM   #7
diyAudio Member
 
blakkshepeaudio's Avatar
 
Join Date: Sep 2010
Location: Country Victoria Australia
Just a reminder not to confuse the DCR on Claudio's excellent website, which has two chambers and three ports in total, with the DBR/DCAAV which has two chambers and two ports in total.

Different beasts.
  Reply With Quote
Old 20th October 2011, 10:29 PM   #8
diyAudio Member
 
revboden's Avatar
 
Join Date: Feb 2011
AkAbak can sim a DBR... hope you have a lot of free time if you don't already know it.
  Reply With Quote
Old 22nd October 2011, 04:51 PM   #9
diyAudio Member
 
Join Date: Mar 2010
Quote:
Originally Posted by revboden View Post
AkAbak can sim a DBR... hope you have a lot of free time if you don't already know it.
I'm very new at this stuff but I'm willing to try.Apparently v2.1is not compatible with win 7,where can I find it?
  Reply With Quote
Old 23rd October 2011, 05:29 AM   #10
diyAudio Member
 
blakkshepeaudio's Avatar
 
Join Date: Sep 2010
Location: Country Victoria Australia
Akabak should run under Win7 32 bit, but it does not run under Win7 64: at least, I haven't been able to make it go.
So I use it on my WinXP32 SP3 netbook, which works a treat.

There is also a 'Virtual XP' mode included in Win7 Ultimate (I think) and there is a 'VirtualXP' downloadable from Microsloth which I have, but haven't been game to try on my 'real' PC. My system is very stable and I am reluctant to mess with the OS too much.
  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
Visaton FR10 in Double Bass Reflex enclosure activexp Full Range 11 8th September 2010 11:00 AM
Fostex FE107E Double Bass Reflex Enclosure RemoGaggi Multi-Way 1 9th January 2009 12:25 PM
Double Bass Reflex. Harderror Full Range 24 31st July 2006 10:57 AM
how to design a series tuned double bass reflex/ABC enclosure Puggie Subwoofers 0 1st May 2006 01:47 PM
Double bass reflex information Ilianh Multi-Way 26 28th February 2004 10:19 PM


New To Site? Need Help?

All times are GMT. The time now is 03:33 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