Advice on full range enclosure for 5.1 setup - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 18th January 2003, 04:25 AM   #1
CDJ is offline CDJ
diyAudio Member
 
Join Date: Jan 2003
Location: San Diego
Default Advice on full range enclosure for 5.1 setup

I plan to build small floor standing enclosures for a small room. I thought about designing a single driver loudspeaker using the full range 4” Fostex FE108Sigma (http://www.fostex.com/speakerparts/fe_sigmaseries.html). I plan to use these speakers in a 5.1 setup with a subwoofer with a 80 Hz crossover. Would it be worth the extra effort to make a transmission line enclosure over a closed box design? What Hz would I tune the enclosure? Whose transmission line formula is the best?

Thanks for your help,
Curtis
  Reply With Quote
Old 19th January 2003, 03:23 AM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default Re: Advice on full range enclosure for 5.1 setup

Quote:
Originally posted by CDJ
[B]I plan to build small floor standing enclosures for a small room. I thought about designing a single driver loudspeaker using the full range 4” Fostex FE108Sigma (http://www.fostex.com/speakerparts/fe_sigmaseries.html). I plan to use these speakers in a 5.1 setup with a subwoofer with a 80 Hz crossover. Would it be worth the extra effort to make a transmission line enclosure over a closed box design? What Hz would I tune the enclosure? Whose transmission line formula is the best?
Curtis,

Can you actually get some FE108Sigmas? They would normally be considered as having too low a Q for a TL, but Martin King has shoen (with his FE208Sigma project) that a mass-loaded TL (ML-TL) can work.

The replacement for the FE108 has a bit higher Q, and some new tricks that should make it a better performing driver.

You also need to consider shielding issues if the L, R are close to the TV monitor and the centre channel is usually even more critical (i avoid the problem by using a virtual centre-channel). There are some Fostex shielded drivers that you might want to consider if this is going to be an issue.

For the $$$ involved in an FE108, you could have 2 FE103s (or FE107s -- i think this is the shielded one) and build a bi-pole (or the 1.5 variation) and not have any issues with baffle-step. The BD-Pipe is an example that i know works well -- even with el cheapo RS 40-1197s (budget FE103s).

The best (available) "formula" for TL design is Martin King's software.

And have a look at my site (URL below), and Bob Brine's site.

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 21st January 2003, 05:25 AM   #3
CDJ is offline CDJ
diyAudio Member
 
Join Date: Jan 2003
Location: San Diego
Dave,

Thanks for your info and links. I think I’ll take your advice and purchase the shielded FE107 speakers. Who is a good dealer to get loudspeaker parts?

Thanks again,
The Newbie,
Curtis
  Reply With Quote
Old 21st January 2003, 05:28 AM   #4
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 CDJ
FE107 speakers. Who is a good dealer to get loudspeaker parts?
For Fostex in the US Madisound.

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

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
Full range driver & enclosure selection help CrookedChris Full Range 36 26th August 2009 10:59 PM
can I add additional Full range driver to my enclosure shuggi67 Full Range 6 2nd August 2009 04:45 AM
Vintage Full range- Need some cab advice waam68 Full Range 7 19th August 2008 09:30 PM
full range ht setup help kazoo Full Range 18 17th November 2007 03:19 AM
JMR Trente's as Full Range Enclosure? kstylianos Full Range 5 20th March 2007 11:18 PM


New To Site? Need Help?

All times are GMT. The time now is 06:10 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