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Old 23rd November 2007, 12:06 AM   #1
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Default middriver box volume

Hi all,

I will use Accuton C2-79/6 mid for my next project and want to be sure about Vb.
High-pass x-over fr at 520Hz, 2nd order electrical thus 10 to 16db acoustical slope, average 87db in the bandpass and 53db at fs (real 110hz).
Please note that my question is NOT related to inside box resonances/standing waves or waves returning to the cone.

So, my question is: Regarding that I want to chose a small sealed Vb, would a Qtc = 0.707 (thus 2.6liters) have a different effect on the cone motion than say Qtc = 0.56 (thus 18liters)?

I guess NO effect on the cone motion even not on the fr curve because of the limited spl at fs and high x-over fr.
I just want to be sure if my point of view is correct. Is it?

Thanks.
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Old 23rd November 2007, 08:22 PM   #2
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UP.
Nobody?
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Old 23rd November 2007, 08:28 PM   #3
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Qtc is not so important in midrange, because you usually cross over at least an octave above the box resonance. You will be crossing a lot higher than one octave, so go for the smaller box
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Old 23rd November 2007, 11:44 PM   #4
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OK, thanks Richard, thus I will be able to fit my beloved acoustic diodes in the mid enclosure without making the main enclosure larger.
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