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FORNO 8th February 2012 08:56 PM

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?



FullRangeMan 9th February 2012 09:50 AM

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

planet10 9th February 2012 10:13 AM

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.


norman bates 9th February 2012 11:22 AM

16' wide ??????????/

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


THWO 15th February 2012 01:57 PM

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.


Nelson Bass 18th March 2012 04:56 PM


Originally Posted by THWO (
...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

neebster 18th March 2012 10:53 PM

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?

THWO 19th March 2012 09:43 AM

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 -


bAD kLOPFER 19th March 2012 04:28 PM


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


THWO 19th March 2012 05:05 PM

Hi Sven,

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


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