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Old 28th December 2012, 04:38 PM   #21
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by Bjohannesen View Post
Hi

I have done some simulation with BetsyK in a design approach like my TABAQ. The design is very simple, and the simulation looks very promising.

I hope this can be used as inspiration

Hi from
Bjorn
Bjohanessen,

Wow, the BetsyK does look very good in the Tabaq! You would be hard pressed to find something else with 95db and performance like this fir $100/pair. It is inspiring but this would be a pretty big Tabaq.
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Old 28th December 2012, 04:42 PM   #22
xrk971 is offline xrk971  United States
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Dumbledog,
The dimension is the cross section based on driver Sd. The sim has cross section set at 4.8 x Sd. So choose your baffle width to physically fit driver and calculate depth to get area to equal 4.8 x Sd. The specs list Sd ad 29, I assume this is in square inches. So for example, I think assuming a 10 in wide baffle, the depth will be about 11 in. However, you want to avoid a cross section that is close to square, maybe make baffle wider.

Last edited by xrk971; 28th December 2012 at 04:56 PM.
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Old 28th December 2012, 05:18 PM   #23
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Wild Burro Audio lists the Sd for the Betsy k at 22.96 (I assume inches), but this doesn't make much sense. Other 8 inch full rangers list the sd as being between 210 and 220 square centimeters, or about 32.5 to 34 square inches. Could the Betsy be that much smaller?
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Old 28th December 2012, 06:49 PM   #24
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I have seen 229.6 cm2 in other sims.
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Old 28th December 2012, 08:46 PM   #25
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Bjorn, where is the driver placed in the sim? Near the end or at a place dictated by MJK's alignment tables?
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Old 28th December 2012, 10:57 PM   #26
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Sorry it is 15" from the closed end.
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Old 29th December 2012, 01:15 AM   #27
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Thanks. I'm probably going to use this design. Seems great. Thanks so much for your help.
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Old 29th December 2012, 01:55 PM   #28
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Hi Dumbledog, glad to hear.

Once you have the final external size of the cabinet I can calculate the baffle step filter.

As you probably know you can set width and depth of the cabinet as you like as long as the internal area is not changed.

Looking forward to follow your project.

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Bjorn
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