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Old 26th April 2004, 09:38 PM   #1
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Default Huge sealed vs open baffle

I going to redo a very badly constructed wall, and thougt of making a rather big seal cabinet (approx 3500l).

Currently I running a open baffle setup (JBL2225 + fostex FE206E with active XO and some eq) and I like the free airy charasticits very much.

Will the huge sealed cabinet also have this sound

I've been able to find sites descriping subwoofers being build this way, but my concer is the midrange which no of the sites address, or do I just need a two day google course?
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Old 26th April 2004, 10:01 PM   #2
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The JBL´s could work well that way if wall is rigid enough, the Fostex units will be utterly spoilt. All the caracter You´ve got is an effect of not having a cabinet.
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Old 27th April 2004, 12:27 AM   #3
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With a sealed cabinet that large, the enclosure basically becomes free baffle. The bass rolloff isn't as great because the front/back waves never meet each other, but Linkwitz says monopolar bass has more peaks and nulls in the response than does dipolar bass.
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Old 27th April 2004, 01:01 AM   #4
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What you'd be looking at is an infinite baffle. Check out the "Cult of the Infinitely Baffled". Those guys would be the IB experts.
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Old 27th April 2004, 01:19 AM   #5
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Ack! What made me say "free baffle"? I was thinking IB.
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Old 27th April 2004, 06:05 AM   #6
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I did check ut "Cult of the Infinitely Baffled" but couldn't find any info or projects where the entire speaker was made this way only the sub.

I will try asking them if anyone knows how the sound of IB compares to OB.
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Old 27th April 2004, 06:31 AM   #7
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123 ft^3. Might work ... can you make the wall leaky?

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Old 27th April 2004, 06:48 AM   #8
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How leaky does it need to be?

And is it better to leak into the room where the sound should end up or the room on the other side of the wall?
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Old 27th April 2004, 06:51 AM   #9
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Quote:
Originally posted by Flemming J P
How leaky does it need to be?

And is it better to leak into the room where the sound should end up or the room on the other side of the wall?
Enuff to make sure there is No change in pressure in the cavity... the bass would go lower if it was the other room... (a big double chamber box )

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Old 27th April 2004, 07:15 AM   #10
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Default Good idea

But not being able to adjust things like placement and toe-in etc. seems a little sad. You would'nt even be able to move the sweet spot a little. Bass shouldnt bive much trouble though.

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