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Old 12th December 2011, 09:49 PM   #11
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Noting that Zaph posted test results (and thus gave his blessing) for this driver, here's a small line array that might be useful as a desktop speaker (or wall mounted next to a flat panel TV). The high Qts (0.72 or 0.95 depending on the spec sheet revision!) suggests the possibility of using open baffle?
(3 in series)//(3 in series) = 9 Ohms.

Baffle shown is 24 inches tall and 6 inch diameter.
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File Type: jpg six pack no baffle.jpg (22.0 KB, 720 views)
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Old 23rd December 2011, 01:46 AM   #12
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4 of these drivers in a vertical array would have a nice response down to 80 hz in a vented box 15L with a vent 2" ID and 1" length. It would be 3-4 dp high near it's fs. I would place the port on the back in the center. Pad the back wall with dampening meterial.

If the cabinet was made 6.5"W x 18"H x 12 1/2"D the narrow baffle might help smooth the boosted low end.

crossover range would be 80-100 hz.
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Old 23rd December 2011, 01:48 AM   #13
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Dampening would be needed all all the walls perhaps since this is a full range.
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Old 23rd December 2011, 01:55 AM   #14
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If you want a true full range go with something that has a lower fs and higher xmax. Moving mass is 2.6 grams. You would need a fancy cabinet to mass load this thing into reaching the low registers and volume levels would be very limited.

Still, this driver is very impressive and deserves more attention.
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Old 23rd December 2011, 01:56 AM   #15
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Line array seems to be the way to go. Power handling, xmax and sensitivity are all quite low so you almost have to use lots of them for any kind of decent burst SPL.

That or you could run them for a very narrow passband, but what's the point of that?
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Old 23rd December 2011, 10:15 AM   #16
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I'm not sure about more than 4. Imaging becomes a wall of sound. You have to boost the high end. But an array is an option. I'm always for making the full ranger move less far.

Norman
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Old 24th December 2011, 10:48 AM   #17
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Unless you are using it for PA 4 would be plenty.
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Old 24th December 2011, 10:54 AM   #18
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4 x 3.5" per side ain't enough for me.....................

Norman
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Old 31st December 2011, 03:10 AM   #19
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This driver's had my attention for some time now and i'm contemplating something a bit unconventional. I've been toying with the design for some time now of 8 of these in two vertical arrays of 4 side by side with a central 1" dome planted in the 'diamond' created by four co-located corners of the Vifa's. I wouldn't ask these to play anything less than 200hz and would suppliment them with an active sub, maybe even a simple plate amp driven speaker level and passed on the to the Vifa's with a simple 1st order high pass but given eight of these in a 1 liter box, there might not even be a need for a filter as a single unit would be at 110dbbefore xmax was achieved.

Remember these?

Click the image to open in full size.
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Old 5th March 2012, 12:57 PM   #20
Pepe is offline Pepe  Sweden
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Here are have some plans for a small monitor/pc speaker using this driver:

http://www.vifa.de/bausatz/starter/k...rtAirKitPC.pdf

Vifa 9 BN 119/8
= Peerless FR35/8
= Peerless TC9FD-18-08

I'm planning on replacing my coral flat 5ii speakers with it since i can not accomodate the big boxes it needs to reach low enough for mating with my single sub.
So hoping that thees small boxes will fit my needs better.
Other ideas are more than welcome.

Been looking at the scanspeak discovery 10f also (more expensive) but can't find any diy builds with that driver.

Peter
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