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Old 5th September 2006, 11:03 PM   #1
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Default What to tune my enclosure to?

I am building a sub and I need help choosing a tuning frequency.

Here's what I got:

--Dayton DVC 15" (Tempest clone)
--250 watt Rhythmik Audio amp
--250 liter ported enclosure

What would be a good tuning frequency for this project, and how do you decide on a tuning frequency?

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Old 5th September 2006, 11:22 PM   #2
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Hey rocko,
Didn't you model with a 200l box and get 19Hz below? My winISD doesn't have the dayton; what does yours suggest?

From the curve in your thread below, I think you could go a little lower, maybe 15Hz, but I'm far from the most experienced here
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Old 5th September 2006, 11:33 PM   #3
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Quote:
Originally posted by GhettoSQ
Hey rocko,
Didn't you model with a 200l box and get 19Hz below? My winISD doesn't have the dayton; what does yours suggest?

From the curve in your thread below, I think you could go a little lower, maybe 15Hz, but I'm far from the most experienced here my enclosure.
Do you have WinISD Pro? If so, just click (new project) then click (new) and add the following parameters in there for the 15" Dayton DVC (model: DVC385-88).

Qes = .39
Qms = 12.28
Fs = 20.4 hz
Vas = 9.92 cu. ft.
Mms = 197 grams
Re = 2.6 ohms
Le = 1.81 mh
Xmax = 15.1 mm

WinISD will automatically calculate the other parameters that you do not enter.
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Old 5th September 2006, 11:47 PM   #4
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OK, it gives an freq of 20.88Hz, but IMO the curve could be flatter at 24Hz. It's all +/- 1db. What are your goals?

With a 4" wide port of 3.75" you would have a tuning freq. of 23.92Hz, f3 around 21.5. You can bring your f3 down to 20.5 with a tuning of 20.88Hz, vent 4" by 5.83"
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Old 6th September 2006, 04:00 AM   #5
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I like organ music so this is the direction I would lean.

mike
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