Speakerplans.com Homepage
Forum Home Forum Home > Plans > New Projects Forum
  New Posts New Posts RSS Feed - 21" Ported Horn design idea
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

21" Ported Horn design idea

 Post Reply Post Reply Page  <123
Author
Message
Arcy12 View Drop Down
Registered User
Registered User


Joined: 07 September 2018
Status: Offline
Points: 12
Post Options Post Options   Thanks (0) Thanks(0)   Quote Arcy12 Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2020 at 12:23pm
Hey dude I'm keen to put one of these together,  could i have a cut list and routing details.
Cheers

Back to Top
NiToNi View Drop Down
Registered User
Registered User


Joined: 17 February 2017
Location: London
Status: Offline
Points: 15
Post Options Post Options   Thanks (0) Thanks(0)   Quote NiToNi Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2020 at 12:59am
+1

Would love to have a go at this mate!

... although slightly lower corner at 27 Hz would have been perfection Wink
Back to Top
Fracture_clinic View Drop Down
Registered User
Registered User
Avatar

Joined: 01 November 2018
Location: Norwich
Status: Offline
Points: 113
Post Options Post Options   Thanks (0) Thanks(0)   Quote Fracture_clinic Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2020 at 1:38pm
I cant install Hornresp on my machine (admin issues) can anyone speculate these changes please?

1) larger chamber all else the same
2) larger chamber and horn extended through 90 degrees (over the port exits) and along width of box. Assume ports are relocated + ignore external dims for now. 
3) Same as above but with chamber remaining the same.

Asking a lot I know - until lockdown is over I can't jump on a buddies laptop to try myself. 

Not asking for sims just interested in bouncing ideas around.

TIA


Edited by Fracture_clinic - 14 May 2020 at 1:40pm
Back to Top
bob4 View Drop Down
Old Croc
Old Croc
Avatar

Joined: 29 February 2004
Location: Finland/Germany
Status: Offline
Points: 1633
Post Options Post Options   Thanks (0) Thanks(0)   Quote bob4 Quote  Post ReplyReply Direct Link To This Post Posted: 30 July 2021 at 4:00pm
Kevin, we would like to build your ported horn, any chance of getting a set of plans? 

Back to Top
smitske96 View Drop Down
Young Croc
Young Croc


Joined: 16 February 2016
Location: The Netherlands
Status: Offline
Points: 786
Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 22 November 2021 at 8:42am
Back to Top
smitske96 View Drop Down
Young Croc
Young Croc


Joined: 16 February 2016
Location: The Netherlands
Status: Offline
Points: 786
Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2021 at 9:38am
Am I correct in thinking that they tune the BR port high and the horn low? 
In all other quick sims, I can not reach such 2,83V sensitivity figures.
Back to Top
toastyghost View Drop Down
The 10,000 Points Club
The 10,000 Points Club
Avatar

Joined: 09 January 2007
Location: Manchester
Status: Offline
Points: 10464
Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2021 at 9:52am
Originally posted by smitske96 smitske96 wrote:

Am I correct in thinking that they tune the BR port high and the horn low? 
In all other quick sims, I can not reach such 2,83V sensitivity figures.


I would treat the Seeburg as a variant of tapped horn, rather than a rear ported horn. It’s very dark in the renders, but I have a feeling that the driver ‘vent’ also opens into the horn mouth based on a similar design I saw elsewhere.

Also that’s the peak sensitivity value in the specs. Not the average.

Edited by toastyghost - 29 November 2021 at 9:53am
Back to Top
smitske96 View Drop Down
Young Croc
Young Croc


Joined: 16 February 2016
Location: The Netherlands
Status: Offline
Points: 786
Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2021 at 1:40pm
Yes, but it even has a similar/higher sensitivity @50Hz than for example a BC218.
According to the measured response peak sensitivity is around 111/112dB @+-150Hz, which does fall out of the desired bandwidth but still is pretty high.

If I may ask, which design are you talking about regarding the vent also tapping in the horn mouth?
Back to Top
bob4 View Drop Down
Old Croc
Old Croc
Avatar

Joined: 29 February 2004
Location: Finland/Germany
Status: Offline
Points: 1633
Post Options Post Options   Thanks (0) Thanks(0)   Quote bob4 Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2021 at 4:29pm
Originally posted by smitske96 smitske96 wrote:

Am I correct in thinking that they tune the BR port high and the horn low? 

Isnt that very unlikely, since you need lab horn size for real 30 hz horn loading (in multiples of four!!)

I would have guessed the reverse Confused


Edited by bob4 - 29 November 2021 at 4:29pm
Back to Top
MarjanM View Drop Down
Old Croc
Old Croc
Avatar

Joined: 10 February 2005
Location: Macedonia
Status: Offline
Points: 7607
Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2021 at 7:36pm
That Seeburg box looks like the old Martin Audio ported horns.
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
 Post Reply Post Reply Page  <123
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.078 seconds.