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Old 4th December 2009, 07:27 AM   #1
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Default 4 driver focused array

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Old 4th December 2009, 08:01 AM   #2
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Nice. I see you have additional adjustable damping applied to the top of the cabinet as well...
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Old 4th December 2009, 08:13 AM   #3
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lol, ty.

4 x 4" tang band bamboo drivers.

box is 2' tall x 2' wide x 19" deep, open backed, 3" thick foam covering back.

3/4" oak plywood with a 12' focus.

my only issue with it is when you stand up it sounds like your ears instantly plugged up.



Norman

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Old 7th December 2009, 02:26 PM   #4
Henkjan is offline Henkjan  Netherlands
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so if I understand correctly, the drivers are alligned so that they all are focussed on the listning spot, with equal distances thus, and therefore no comb filter effects?
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Old 7th December 2009, 05:13 PM   #5
Jozua is offline Jozua  South Africa
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Norman

How does it sound ?

Thx

Jozua
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Old 7th December 2009, 11:20 PM   #6
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It sounds Wonderfull, given you are the approximate distance away and the approximate distance vertical.

It is open baffle, huge front face, and 4 x 4" drivers (8" driver area) without the whizzer problems.

But my wife really likes it, it sounds good it a limited arc from it (a couch for example).

Henkjan, yes, they are all equal distance to your ears, no combing filtering.

Next up is a 16 x b3s array, 66" tall.

If someone can tolerate the TINY sweet spot, I'd highly recommend it.

Oh yea, if you sit 12' away, make the focus for 14' (gives roughly 4" tall of sweet spot at 12' or so).

It has more high end that my 2 driver setup, I think the reduction in ceiling reflection is the reason, or the reduced excursion, I don't know.

Norman
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Old 8th December 2009, 08:19 AM   #7
Henkjan is offline Henkjan  Netherlands
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so the the sweet spot is not small in sideways direction, is the whole couch OK? I think of making a line array for my HT, so the seating location is rather fixed anyway in distance and height, but varies sideways.
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Old 8th December 2009, 08:53 AM   #8
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yes, the whole couch OK, remember, it is a 4" driver I use, larger driver = less off axis highs.


Norman
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Old 8th December 2009, 09:05 AM   #9
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errm...Norman...your loosely coupled damping device loving them...might that mean you ought to do something about resonances?
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Old 8th December 2009, 09:16 AM   #10
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Great Work Norman, Did they take you long to put together or was the wood pre-laminated?

I was also wondering how you worked out the curve of the baffle ?

Cheers
Dean
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