corner loading details? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 5 Old 09-20-2014, 09:28 AM - Thread Starter
Member
 
Tstan7777's Avatar
 
Join Date: Jan 2013
Posts: 122
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Liked: 17
corner loading details?

When corner loading a ported sub, should the port fire into the corner or out into the room? Does it even make a difference? I have a hsu that has 1/2 port mode. I just moved the sub into the corner and have the port towards the wall plugged.
Tstan7777 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 09-20-2014, 09:46 AM
AVS Special Member
 
derrickdj1's Avatar
 
Join Date: Sep 2011
Posts: 1,498
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 107 Post(s)
Liked: 149
The port diameter should be the same distance from the wall. Otherwise, no real difference.

Klipsch RF 7 based HT 7.4, Pioneer SC 35, Acurus 200 Five, Dayton 18 Ultimxa Dual Sub Cab(2), Dayton 18 Ultimax Large Vented Sub Cab (2), on Berhinger I Nuke DPS amps, Samsung BDP F 7500, Asus/My Book Live HPC 4 TB

Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500
derrickdj1 is offline  
post #3 of 5 Old 09-20-2014, 02:27 PM
AVS Special Member
 
Bill Fitzmaurice's Avatar
 
Join Date: Nov 2009
Location: New Hampshire
Posts: 9,914
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 1501
Quote:
Originally Posted by Tstan7777 View Post
When corner loading a ported sub, should the port fire into the corner or out into the room? Does it even make a difference? I have a hsu that has 1/2 port mode. I just moved the sub into the corner and have the port towards the wall plugged.
The direction that the port aims makes no difference. The direction the driver aims does, though probably not for the reason you might think. Aiming the driver at the corner or wall adds a bit of acoustic filtering to above bandwidth harmonics radiated by the driver, which you don't want, while having the cone relatively close to a corner or wall can add some low frequency loading, lowering the sub response, which you probably do want. As to how close the cone or port must be to a corner or a wall to fully benefit from space loading, it's less than 1/4 wavelength. With an 80Hz crossover that's 3.5 feet for the cone. The port can be even further away, as its radiation pass band doesn't go as high as the cone does, by an octave or two. Most users would not want to aim the driver at the corner or wall and the port away from it, because of how it looks, but in terms of how it sounds that's usually going to give the best result.

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
Bill Fitzmaurice is offline  
post #4 of 5 Old 09-20-2014, 06:47 PM - Thread Starter
Member
 
Tstan7777's Avatar
 
Join Date: Jan 2013
Posts: 122
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Liked: 17
Well....it's a down firing sub, lol. But basically it doesn't matter which direction the port fires. If it were possible, the driver firing into the wall might be beneficial?
Tstan7777 is offline  
post #5 of 5 Old 09-20-2014, 07:12 PM
AVS Special Member
 
Bill Fitzmaurice's Avatar
 
Join Date: Nov 2009
Location: New Hampshire
Posts: 9,914
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 1501
Quote:
Originally Posted by Tstan7777 View Post
If it were possible, the driver firing into the wall might be beneficial?
Down firing has the same benefits as aiming it at a corner or a wall.

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
Bill Fitzmaurice is offline  
Reply Subwoofers, Bass, and Transducers

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

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