Designing for corner placement - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 13th February 2008, 09:47 PM   #1
odell is offline odell  United Kingdom
diyAudio Member
 
Join Date: Apr 2007
Default Designing for corner placement

I'm looking for some help - I have a pair of Fostex FE167E drivers which I plan to use in a small room (6' 3" x 9' 2" with 8' ceiling). The resulting speakers will need to be mounted on the short wall (over a desk so floorstanders are out) and I will be listening from around 2-3 feet. Amp is a Trends TA 10.1.

What I would ideally like to do is build cabinets with a triangular cross section which would then fit flush into the corners. What I don't know is how to adapt the cabinet design to work with the corner placement rather than against it. Should I go for a 15l cabinet as recommended by Fostex or something a little larger? How can I avoid boomy bass or other problems normally associated with corner placement?

Thanks for your help,

Mark
  Reply With Quote
Old 13th February 2008, 11:45 PM   #2
John L is offline John L  United States
diyAudio Member
 
John L's Avatar
 
Join Date: Oct 2001
Location: Cary NC
Are you living in prison?
  Reply With Quote
Old 14th February 2008, 12:03 AM   #3
diyAudio Member
 
Godzilla's Avatar
 
Join Date: Nov 2005
Location: New York
http://www.zillaspeak.com/systems.asp

http://www.zillaspeak.com/bib.asp

My room is not much bigger.

Godzilla
  Reply With Quote
Old 14th February 2008, 12:57 AM   #4
ttan98 is offline ttan98  Australia
diyAudio Member
 
Join Date: Apr 2006
Location: Melb
Default Re: Designing for corner placement

Quote:
Originally posted by odell
I'm looking for some help - I have a pair of Fostex FE167E drivers which I plan to use in a small room (6' 3" x 9' 2" with 8' ceiling). The resulting speakers will need to be mounted on the short wall (over a desk so floorstanders are out) and I will be listening from around 2-3 feet. Amp is a Trends TA 10.1.

What I would ideally like to do is build cabinets with a triangular cross section which would then fit flush into the corners. What I don't know is how to adapt the cabinet design to work with the corner placement rather than against it. Should I go for a 15l cabinet as recommended by Fostex or something a little larger? How can I avoid boomy bass or other problems normally associated with corner placement?

Thanks for your help,

Mark

try this site you may get a few ideas there.

http://www.pispeakers.com/

the designer/owner is very helpful.
  Reply With Quote
Old 14th February 2008, 01:34 AM   #5
Jeb-D. is offline Jeb-D.  United States
diyAudio Member
 
Jeb-D.'s Avatar
 
Join Date: Nov 2005
Location: SoCal
Quote:
How can I avoid boomy bass or other problems normally associated with corner placement?
Boomy bass is better than no bass

In all honesty I've had some full rangers sound better in the corner. The bass was slighly boomy but still better defined then what comes out of a lot of the subs these days. The FE167E normally has no bass anyways without a BSC circuit. So the recommended enclosure adapted for the corner might do fine with no correction circuit.

Corner horns are sweet. There is one using the FE167E on the Decware website, but it's big and heavy.
  Reply With Quote
Old 14th February 2008, 04:33 AM   #6
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 Jeb-D.
The FE167E normally has no bass anyways without a BSC circuit.
Maybe in your experience. Unless in a big room we found Demetri to have too much bass, Also keep in mind that pushed up against a wall a box has next to no baffle step. In a corner, and in a room this small, you want to design for very low Q bass if you don't want it to be boosted. I'd start out with a sealed box with Q somewhere between 0.5 & 0.577.

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 14th February 2008, 05:24 AM   #7
Jeb-D. is offline Jeb-D.  United States
diyAudio Member
 
Jeb-D.'s Avatar
 
Join Date: Nov 2005
Location: SoCal
Quote:
Maybe in your experience. Unless in a big room we found Demetri to have too much bass
What is Demetri? I've only run the FE167E driver in the recommended bass reflex, which may be the reason for lacking bass. Excellent sounding with a BSC circuit, but very harsh and shouty without one. It also does pretty good without BSC compensation, when driven by an amp with a Zout of 8ohms and a Zobel.
  Reply With Quote
Old 14th February 2008, 07:34 AM   #8
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 Jeb-D.
What is Demetri? I've only run the FE167E driver in the recommended bass reflex, which may be the reason for lacking bass.
Quite a bit bigger than the 167 BR

http://www.planet10-hifi.com/boxes-fostex.html

We built a variation on the factory 15l (with lower tuning) for our initial 167e tweaking experiments.. It was good sounding and served th epurpose -- low bass is not its strong point -- and the current owner really enjoys them.

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 14th February 2008, 11:14 AM   #9
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Yeah, the Fostex BR isn't bad -one of their better reflex-boxes IMO, but it doesn't extract the most out of the drivers; certainly not WRT extension.

My own 167 MLTLs are actually running sans a BSC circuit too. That said, they are pushed up against a rear wall, which helps, despite my designing them with as narrow a baffle as possible.
__________________
Community sites www.frugal-horn.com http://frugal-phile.com/
  Reply With Quote
Old 14th February 2008, 01:35 PM   #10
odell is offline odell  United Kingdom
diyAudio Member
 
Join Date: Apr 2007
Thank you to everyone for the replies - I'm new to this and you've been very helpful.

I don't expect miracles from this compromised room, but would like to make the best out of the situation. As far as bass goes my only reference is listening to typical small standmount speakers which list frequency reponse low numbers of around 65/70Hz. I wouldn't want less bass than this type of speaker.

I've plotted a couple of boxes in WinISD - a 15l sealed box gives a Q of 0.57, as advised by planet10. Am I right in saying that I could start sealed and simply add a port later if necessary?

Also, should I build the triangular cross section cabinet with a narrow baffle (equilateral triangle) or a wider baffle (right triangle) - what affect does baffle width have?

Thanks again,

Mark
  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
Designing for on-wall/near-wall speaker placement morbo Multi-Way 4 27th November 2010 05:52 PM
Pros and cons of corner placement nunayafb Multi-Way 9 5th May 2006 10:08 AM
sub for corner placement... wuffer Subwoofers 5 23rd December 2005 10:23 AM
Line array behavior with corner placement johninCR Multi-Way 8 19th August 2005 03:52 PM
Designing for guys who like designing Sch3mat1c Tubes / Valves 14 31st August 2003 12:46 PM


New To Site? Need Help?

All times are GMT. The time now is 08:26 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