High Efficiency Speaker Asylum

Posted by Timbo in Oz (A) on August 29, 2007 at 23:40:40

In Reply to: RE: best midrange enclosure for Fostex FE 206e ? posted by Gera on August 29, 2007 at 21:37:45

yep!

The BDS point is about 200 hz as well which gives -3db dip shelving to -6db. And, lead a 'reverse trumpet' out the back with progressively tighter stuffing into a sealed back-end. Sleeve lengths of PVC pipe from 100mm, 90mm, 75mm - 60mm i.d. for the last 2/3rds.

OR

A small OB with shallow sides - dimensioned to die at 200 hz - natural 1st order , -6db/octave

Next would be a folded labrynth with a length* of about 40cms - *depends on the stuffing! It should HP itself at 6db/octave possibly 12 db/octave below 200.











Warmest

Timbo in Oz
The Skyptical Mensurer and Audio Scrounger

And gladly would he learn and gladly teach - Chaucer. ;-)!

'Still not saluting.'

http://www.theanalogdept.com/tim_bailey.htm

• small OB dimentions? - Gera 11:08:45 08/30/07 (1)
  In Reply to: RE: Seriously? a 22 inch sphere! OR a small shallow box OB posted by Timbo in Oz on August 29, 2007 at 23:40:40

  Tim,
  
  Where do I get such spheres?
  or
  How do I figure out the dimentions of the OB? Any shape I should stick to? Thickness of baffle?
  
  Thanks
  
  
  

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  • RE: small OB dimentions? - Pargon 12:32:27 08/30/07 (0)
    In Reply to: RE: small OB dimentions? posted by Gera on August 30, 2007 at 11:08:45

    Try searching here and elsewhere for basszilla. Dick used the 206 as the top of a two way, and then the middle of a three way , using OB for the Fostex. there are many thoughts on dimensions and xover to be found.
    
    

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