High Efficiency Speaker Asylum

RE: 15" suitable for ??? here's 3M and 4M horn simulation - a try at Tuba HT bulk

70.20.37.59

Bill Fitzmaurice

In Reply to: RE: 15" suitable for ??? here's 3M and 4M horn simulation - a try at Tuba HT bulk posted by freddyi on July 15, 2007 at 07:47:07

Freddy, this is McBean of the THT, 24" wide, Tempest loaded, corner placement. Below 25Hz comes up quite a bit with cabin gain, it's basically flat to 15Hz in an average room. Compared to your plots notice that extension is lower, achieved by trading off SPL. Danley does the same thing with his DTS-20. Cross it at 60Hz and the spike at 85Hz disappears.

Follow Ups:

RE: 15" suitable for ??? here's 3M and 4M horn simulation - a try at Tuba HT bulk - freddyi 08:35:40 07/17/07 (2)
hi Bill - might you sometime post the McBean input window?

Freddy
- RE: 15" suitable for ??? here's 3M and 4M horn simulation - a try at Tuba HT bulk - Bill Fitzmaurice 09:28:52 07/17/07 (1)
  "hi Bill - might you sometime post the McBean input window?"
  
  That's proprietary, but I'll tell you how to get where you want to go. Model your segments as exponential, even if they're actually conic, as that will tell you the flare frequency of each segment. To get higher sensitivity, with less extension, go with a higher flare frequency. To get lower extension with less sensitivity go with a lower flare frequency. For instance, the THT has an average 12Hz flare frequency, the T36 an average 22Hz. After you've got what you want you can put the segments back to a conical and compare, but chances are the result compared to exponential is close if not identical.
  - RE: 15" suitable for ??? here's 3M and 4M horn simulation - a try at Tuba HT bulk - freddyi 15:10:09 07/17/07 (0)
    thanks for the tip Bill - - Best,Freddy

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