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Old 8th April 2021, 06:36 AM   #11
freddi is offline freddi  United States
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you're welcome - that's a fine looking 15cx - I tried fudge simming it in a Karlson but did not like the result.

It did look interesting in a 70 liter chamber reflex with big vent by RCA-Fan

Click the image to open in full size.

Last edited by freddi; 8th April 2021 at 06:40 AM.
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Old 8th April 2021, 06:54 AM   #12
Brinkman is offline Brinkman  United States
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The impedance is definitely more tube friendly in the Karlson
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Old 8th April 2021, 07:22 AM   #13
freddi is offline freddi  United States
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that's a "BVR" Big Vent Reflex. It might take Akabak3 very well tuned to show a Karlson. I do think your 15CX would be nice in the original Karlson - but then again also nice in a reflex.
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Old 8th April 2021, 12:39 PM   #14
b_force is offline b_force  Europe
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Don't forget that in WinISD only shows one side of the story.
The total frequency response and sound also has to do with the interaction of the crossover as well as things like baffle step etc.

One could deliberately choose for a bit of an hump in the bass response to compensate for the baffle step.
Or deliberately create a dip to compensate for the DC resistance (and other effects) in the crossover filter
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Old Today, 01:39 AM   #15
Brinkman is offline Brinkman  United States
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Very true.

One early idea was to crossover to an active midbass module beneath the 15” coaxial at the baffle step compensation frequency.
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