ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1]   Go Down

Author Topic: ported subs proper coupling  (Read 919 times)

John Barclay

  • Newbie
  • *
  • Offline Offline
  • Posts: 2
ported subs proper coupling
« on: April 01, 2018, 10:35:48 pm »

xxx....sub box with driver lower front, ports upper front  Identical box stacked on top.  Ports together with driver top and bottom of stack OR ports on top and bottom of stack Thx  :)
Logged

Tim McCulloch

  • SR Forums
  • Hero Member
  • *
  • Offline Offline
  • Posts: 19207
  • Wichita, Kansas USA
Re: ported subs proper coupling
« Reply #1 on: April 01, 2018, 10:49:33 pm »

xxx....sub box with driver lower front, ports upper front  Identical box stacked on top.  Ports together with driver top and bottom of stack OR ports on top and bottom of stack Thx  :)

It probably doesn't matter.  How far apart are the ports in the latter scenario?

Sources within 1/4 wavelength will combine, and the bottom octave is what comes out of the port.  At 60Hz that's roughly 4.5 feet...
Logged
"Practicing an art, no matter how well or badly, is a way to make your soul grow, for heaven's sake. Sing in the shower. Dance to the radio. Tell stories. Write a poem to a friend, even a lousy poem. Do it as well as you possible can. You will get an enormous reward. You will have created something."  - Kurt Vonnegut

Ivan Beaver

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 8674
  • Atlanta GA
Re: ported subs proper coupling
« Reply #2 on: April 02, 2018, 07:30:14 am »

xxx....sub box with driver lower front, ports upper front  Identical box stacked on top.  Ports together with driver top and bottom of stack OR ports on top and bottom of stack Thx  :)
It depends on how high the cabinets are run, the tuning freq of the ports, the size of the cabinet etc.

It may or may or may not matter-based on the answers.

But to be safe, I would put the ports on the outsides, drivers together.

This way the drivers have a better chance of coupling at the higher freq, and since the ports are tuned at the lower freq, the wavelengths are longer, so they can be further apart and still couple.

It is all about wavelength size and spacing.
Logged
A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

PHYSICS- NOT FADS!
Pages: [1]   Go Up
 


Page created in 0.039 seconds with 22 queries.