Angling of ports and/or drivers? - 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 8th August 2010, 05:48 PM   #1
diyAudio Member
 
Join Date: Aug 2010
Default Angling of ports and/or drivers?

So, if one were to undertake building an enclosure along the lines of this one, but knew because of placement restrictions that the enclosure would need to be mounted either above or below the planned listening position (possibly as much as 1 1/2'-2' at a twelve foot listening distance), would it be advantageous to cant either the driver, or the ports (or both) to point directly at the desired prime "sweet spot"? Could such modifications result in undesirable side effects in sound reproduction, or is it just a waste of time as the "problem" is not really much of an issue anyway?

A couple of qualifiers...

Let us stipulate these two things for the sake of conversation...

1. The difficulty of construction is not an issue.
2. Angling the entire enclosure is not desirable (aesthetics, read "spouse approval").
  Reply With Quote
Old 26th March 2012, 07:39 PM   #2
fakeout is offline fakeout  Canada
diyAudio Member
 
fakeout's Avatar
 
Join Date: Feb 2012
If there's an answer to this question, my question would be if I wanted to build μFonken, would it make sense to put spikes underneath the speakers only at the front so they're angled up?
  Reply With Quote
Old 26th March 2012, 08:40 PM   #3
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 fakeout View Post
If there's an answer to this question, my question would be if I wanted to build μFonken, would it make sense to put spikes underneath the speakers only at the front so they're angled up?
Certainly a valid approach

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 26th March 2012, 08:59 PM   #4
chrisb is online now chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by Dave McReeferson View Post
So, if one were to undertake building an enclosure along the lines of this one, but knew because of placement restrictions that the enclosure would need to be mounted either above or below the planned listening position (possibly as much as 1 1/2'-2' at a twelve foot listening distance), would it be advantageous to cant either the driver, or the ports (or both) to point directly at the desired prime "sweet spot"? Could such modifications result in undesirable side effects in sound reproduction, or is it just a waste of time as the "problem" is not really much of an issue anyway?

A couple of qualifiers...

Let us stipulate these two things for the sake of conversation...

1. The difficulty of construction is not an issue.
2. Angling the entire enclosure is not desirable (aesthetics, read "spouse approval").
being somewhat familiar with the design, the volume and internal length of ports is included in the calculations, so there'd be a little bit more than simply canting the entire cabinet, but I can't see why not

Dave?
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  Reply With Quote
Old 26th March 2012, 10:17 PM   #5
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 chrisb View Post
Dave?
To maintain tuning the only way i can see it down, would be to vertically angle the baffle top to bottom, with the top shallower than the bottom. The bottom would need to increase in depth by at least 36mm to accomodate the unfolding of the L-shaped vent. The other option would be to move the vent to the back firing out the bottom or top (top better for the aspect of where the vent opening is on the inside.

It would then have a significant angle, minimum 67 degrees -- quite a radical angle. Might still need an offset placed on a desk or upside down on a wall.

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 27th March 2012, 06:18 PM   #6
diyAudio Member
 
tuxedocivic's Avatar
 
Join Date: Jan 2011
Location: Ladysmith, BC
Quote:
Originally Posted by chrisb View Post

now, where there some specific questions not yet answered?
Why angle a port? Doesn't seem like there would be a reason if you ask me. Perhaps angling the driver would have some benefit...
  Reply With Quote
Old 27th March 2012, 06:36 PM   #7
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Off topic split off to here:

The P10-hifi web 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 27th March 2012, 06:38 PM   #8
diyAudio Member
 
Join Date: Feb 2012
Location: Chicago
Is there any audible/measurable difference between angling the driver baffle, versus angling the entire cabinet, provided the internal volume stays the same (and no introduced standing waves, etc.)?
  Reply With Quote
Old 27th March 2012, 06:44 PM   #9
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 liamstrain View Post
Is there any audible/measurable difference between angling the driver baffle, versus angling the entire cabinet, provided the internal volume stays the same (and no introduced standing waves, etc.)?
Only as it affects the diffraction signature of the box.

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 27th March 2012, 06:59 PM   #10
chrisb is online now chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by planet10 View Post
Only as it affects the diffraction signature of the box.

dave

and on enclosures with array of side mounted slot ports such as the "prime" mini-onken series, an increase in build complexity - it's a lot easier to imagine or draw some of these than to build them
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  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
ANGLING FOR 90 - tangential pivot tonearms directdriver Analogue Source 756 29th July 2014 07:40 PM
Angling drivers left and right in a vertical line-array???? ozziozzi Multi-Way 12 16th January 2009 04:23 AM
Ports Ryan_U Multi-Way 6 2nd November 2004 04:16 PM
"Angling rings"... worth the effort? eRiCdWoNg Multi-Way 16 4th August 2003 09:50 PM
curved ports vs. multiple ports Craig Multi-Way 1 22nd September 2002 07:30 AM


New To Site? Need Help?

All times are GMT. The time now is 10:24 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