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In the Forum: Horn-Loaded Speakers
In the Thread: New superlative horn build - ESD acoustic
Post Subject: Doing the mathPosted by martinshorn on: 5/20/2018
I digged a bit into the doubt of the sub doing 17Hz.
Im using AJhorn, which has proven to be an extremely reliable forcaster in many many cases.
Now, i put all information available from Dai + website in the app. It gives me the following result:
 
       
 
Now what i dont have of course, is majority of TSP.
Well however i can estimate the rough range within + - around something that makes sense.
So the result above will not be out of space.
Though, i played a bit with the values (TS) to see what influences a lot.  

  My conclusions:   - the fs is always introducing a knee of 2nd order hipass, regardless of anything else, in case of this horn you see its
- the flux will only lower Qm and Qe, which is only boosting the sensitivity -> more flux = more output, less flux = less output -> linear behavior
- looking at the graph obviously, the horn doesnt work any better than a k-horn apart from better low-mids due to less foldings
- i also played with different flares and im surprised, Edgar is right, the hyperbolic shape is resistive canceling out the mouth reflection at 50Hz, no other shape can do that well in this configuration

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