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

75.109.11.25

In Reply to: RE: 15" suitable for ??? here's 3M and 4M horn simulation posted by DSM on July 14, 2007 at 21:25:50

hi DSM = heres a poor attempt (I'm not smart nuff) attempt to see one TH type at ~395 liters bulk and a FLH about the same bulk. The FLH might be similar to Bill's Tuba HT so that's something to consider as has plans, "name recognition" and real builds -- in any case more xmax (like 3015LF) would help if trying to get a lot of sound - maybe Bill would sim your woofer
hornresp seems awfully cool
395 liter 2.M (poor attempt) tapped horn:
Input
Schematic
SPL 2.83V
Z - minimum areas
4.8mm Xmax is hit just around 12vrms
SPL 12vrms
2.8 horn in model as BLH vs Tapped Horn (U need someone better than me to do sim !)
400 liter 2.8M FLH in AJ-Horn with 2 cubic foot rear chamber - guessing "about" bulk & path (???) of Bill's Tuba HT - not sure of rest
(I'd still consider trying one in a K - if your amp is large nuff)

Edits: 07/15/07

Follow Ups:

RE: 15" suitable for ??? here's 3M and 4M horn simulation - a try at Tuba HT bulk - Bill Fitzmaurice 11:21:57 07/16/07 (3)
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.
- 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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