High Efficiency Speaker Asylum

RE: Do you feel that the additions hurt design?

73.186.230.3

Bill Fitzmaurice

In Reply to: RE: Do you feel that the additions hurt design? posted by Edp on February 04, 2023 at 10:09:49

They have no sonic effect, probably serve as braces.

Follow Ups:

Somehow the Khorn 3d folding has always been hard to visualize - Edp 10:58:31 02/04/23 (6)
I've had plans, exploded views, 3d renderings of Khorn for 40 plus years along with others like Jensen Imperials, Stromberg-carlson.

Even dug out my very old copy of Badmaieff and Davis How to Build...

What I call 2d horns like Jensen or Edgar, I can grasp important verses unimportant , but 3d horns, especially Khorns I don't get it with as much ease.

They looked like braces but not on any of plans i could find on short notice

Thanks for response
- RE: Somehow the Khorn 3d folding has always been hard to visualize - the Glyph 13:09:05 02/04/23 (1)
  Perhaps these will help with the visualizing.
  - Oh yeah saw those years ago - Edp 13:46:14 02/04/23 (0)
    Actually have had couple opportunities to do some hands on work with them, but its knowing with any certainty what a mod or change would impact, where on 2d or straight folded a bit more understanding.
    
    Still cool to see the se through again.
    
    Thanks
- RE: Somehow the Khorn 3d folding has always been hard to visualize - Bill Fitzmaurice 12:47:13 02/04/23 (3)
  It's hard to visualize for sure. '2d' is usually a constant width horn, so a simple side view tells you all you need to know. The issue with constant width horns is resonance coloration when the width reaches 1/4 wavelength. In a sub that doesn't go above 100Hz, where 1/4 wavelength is 2.8 feet, it's not a problem. But to go to 400Hz or higher, like a KHorn or my DR series, constant widths and parallel surfaces are a major problem. It's not difficult to design folded horns without constant widths or parallel surfaces using modern drawing software, but it's a bear without them. I managed it with my earliest DR horns, as did PWK with his KHorns, but it easily increases the prototyping process time by a factor of ten.
  - At times I wonder if we would had gotten a Khorn if software existed - Edp 13:54:29 02/04/23 (2)
    Never know, but could see software suggest " not recommended " would undo the creation process, resulting in less diversification.
    
    The old art/innovator vs pure science dilemma.
    I'm a science type, but not dismissive of innovators.
    Appreciate your time
    
    Edits: 02/04/23
    - RE: At times I wonder if we would had gotten a Khorn if software existed - tomservo 13:20:29 02/07/23 (1)
      Folding the horn was in his head and was clever
      
      Where software could give different results is in modeling the actual horn and driver. Modern woofers would generally need a smaller throat area and smaller back volume BUT that also means the horn could be larger in a given box volume.
      - RE: At times I wonder if we would had gotten a Khorn if software existed - Bill Fitzmaurice 14:02:41 02/07/23 (0)
        
        In Reply to: RE: At times I wonder if we would had gotten a Khorn if software existed posted by tomservo on February 07, 2023 at 13:20:29
        
        With software he wouldn't have needed the 'rubber throat', knowing without having to experiment what size throat would give the best result.

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