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Old 20th October 2020, 10:25 PM   #111
freddi is offline freddi  United States
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Very cool - - - tuning looks right on a 4 string bass guitar or string bass "low E" string. Also, there is substantial excursion reduction where the front chamber resonates so would guess modulation distortion to measure low over a certain range of two tone combinations.
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Old 23rd October 2020, 05:07 PM   #112
freddi is offline freddi  United States
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@kaameelis

Regarding the Karlson115 1.2X simulation, is there an easy way to shut off the vent's contribution and see response with the back chamber sealed? - - Or does a new model have to created?
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Old 23rd October 2020, 08:15 PM   #113
kaameelis is offline kaameelis  Estonia
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I was easy, I redefined interface between rear and front to wall.
You probably understand what is what.
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File Type: png Karlson115V2Bx1.2vsWOinverter.PNG (180.4 KB, 32 views)

Last edited by kaameelis; 23rd October 2020 at 08:20 PM.
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Old 23rd October 2020, 11:23 PM   #114
freddi is offline freddi  United States
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That is really cool !.

I used to have a graph of 115BK with its port blocked vs open but IIRC, that was smoothed to 1/6 octave.


Here's something to examine as a "tweeter":

Take the standard "Karlson115" which is for a 15 inch speaker and scale it 0.2X for a 3 inch speaker. (3FE22-4 spec below) Block the port. Then see if its usable to say 1KHz or lower crossover without a terrible dip. Also look at the response off horizontal axis vs on axis at a distance of 1 or 2M.

Does Akabak3 assume pure piston behavior for such simulations?


Def_Driver ‘3FE22-4’ | Faital Pro 3 inch fullrange driver 1.73mm xmax
Sd=33cm2
Fs=110Hz
Mms=2.4g
Qms=3.57
Qes=0.4
Re=3.3ohm
Le=0.10mH
Vas=1.3L
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