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Old 8th February 2012, 08:56 PM   #1
diyAudio Member
Join Date: Dec 2009
Default Fullrange for open baffle


I am looking for a fullrange for an open baffle , that utilize a single full range drivers.

The budget should be max £300 per unit.
The baffle can be very big!

Any idea?


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Old 9th February 2012, 09:50 AM   #2
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FullRangeMan's Avatar
Join Date: Aug 2009
Location: Brazil
You will need a big FR, minimum size is 12 inches, 15 inches is redommended for good bass.
15 inches FR will start attenuates below 60-65Hz, or lower with a big baffle.

I aware only the Nirvana Super15Alnico at 1000USD/pair, QTS=0,9 is good, fullranges with low QTS will no delivery a good bass.
Good Luck
>Never go to a psychiatrist, adopt a cat or dog from the streets. On the streets pets live only two years average.
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Old 9th February 2012, 10:13 AM   #3
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Howbig is very big? One of th ebest OBs i've heard was with a 6 1/2" korean made alnico driver -- specifically made for OB. The baffle was 16' wide and housed both channels.

On a smaller baffle the Visaton B200 does a crediable job -- it needs phase plugs to tame the high frequencies.

community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
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Old 9th February 2012, 11:22 AM   #4
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Location: iowa
16' wide ??????????/

I'm impressed !!!!!!!!!!!

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Old 15th February 2012, 01:57 PM   #5
THWO is offline THWO  Germany
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In the low budget segment, I enjoyed the Ciare CH250. With a baffle width of around 22 - 24 " (not ´!) it will do a nice job even without any correction.

If you wish, you may pimp it at a later time with 15" woofers like the Eminence Alpha 15A (suitingly cheap) and, in a luxury version even later, add a cheap (but very good for the money) dome tweeter like the Monacor DT 28N, crossing at, say, around 3,000 Hz.

That´s what I did and it has been great fun. Width at the bottom 16.5", at the "shoulders" 21.5", and hight 49". Front bent abit aroundt the vertical axis.

Click the image to open in full size.

Click the image to open in full size.


Last edited by THWO; 15th February 2012 at 01:59 PM.
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Old 18th March 2012, 04:56 PM   #6
Join Date: Sep 2009
Location: Aarhus, Denmark
Originally Posted by THWO View Post
...If you wish, you may pimp it at a later time with 15" woofers like the Eminence Alpha 15A (suitingly cheap)..."
The Alpha 15a is not very good in an open baffle IME/IMO. Wooly sound and not very dynamic. Please consider the DeltaLite II 2515, check here: OBL11
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Old 18th March 2012, 10:53 PM   #7
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Location: Columbia, Missouri
What about the Wild Burro Betsy? It's made specifically for open baffles, is of reasonable price, and is well reviewed.

I have no first-hand experience with it, myself. But I have been wanting to buy a pair for some time.

Is using 1 or 2 subwoofers out of the question?
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Old 19th March 2012, 09:43 AM   #8
THWO is offline THWO  Germany
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Of course there are better woofers than the Alphas. Maybe a budget question as well...
My Alphas, however, improved severely after coating the inner side of its metal sheet frame with lots of hot glue and stripes of stiff 1/2 inch wool mat. May sound strange but worked well. More precise, accurate and seemingly even faster. Much better now.

Recently, I had the opportunity to listen to Audio Nirvana Super 10 Cast Frame in an open baffle. There are wonderstory to be read about those drivers in virtually all forums "around the world". It certainly is a very good wideband speaker, agreed.

However, since having chopped off the inner conus of the Ciare CH250 and using it as a midrange only, together with the Monacor DT28N Tweeter coupled in at around 3,000 Hz, I am convinced that this combination easily comes upt to those AN10. I was pretty surprised when I discovered that. Maybe even Ciare does not know what an excellent midrange they have here, if implemented the way described.

In a German Forum, I had a thread about my open baffle speakers (sorry, its all in German): Offene Schallwand mit Ciare CH250 und 2x Emminence Alpha 15A, Lautsprecher - HIFI-FORUM with lots of pictures taken during the building phase, too.

The crossover may be seen here: Bild: 115endgltigerweichenpl94lq.jpg - abload.de

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Old 19th March 2012, 04:28 PM   #9
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Location: Germany

in the crossover the bh100 coil is reduced to 5 mH not 5 Ohm, right?

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Old 19th March 2012, 05:05 PM   #10
THWO is offline THWO  Germany
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Hi Sven,

yes, of course, it should read "reduced to 5 mH", as shown in the drawing.

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