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Old 13th January 2010, 12:07 PM   #1
DaveCan is offline DaveCan  Canada
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Default New Open Baffle Concept

Unique concept from Decware in OB design.. Plans are available for the diy crowd.. Audiophile Tube Amps and Tube Gear from DECWARE
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Old 13th January 2010, 03:03 PM   #2
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While the concept certainly is unique (as far as I know) I'd stay far far away from these things as a commercial product.

First, the published specs don't make any sense. He claims 99 db but he's using the Fostex FE207E the last time I checked, which doesn't add up. Also, if those things can do 112 db at 38 hz I'll eat my socks.

Reading up on the history of this design is good for a laugh though, the many iterations were so convoluted and complex and just downright weird that I used to check in often to see what he would come up with next. He started with the FE206E, and desperately tried to make it work. He was using an odd live broadcast system (mic inside the bass box) and sending the bass to his Imperial subs at first. Then he decided the bass section would be better is he used his reference fullrangers as "subs", a speaker that is widely known for it's lack of bass. Finally, I think he gave in and used a slightly higher q driver in order to ditch the ill conceived bass broadcast system.

The concept itself is very interesting, but the $3000 finished product is not.
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Old 13th January 2010, 03:26 PM   #3
DaveCan is offline DaveCan  Canada
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Yeah I hear ya, especially the price compared to some of his other designs that seem much more complex.. He has a very inventive approach however compared to others and for sure there are many naysayers etc.. He has a good ear though, and being a drummer knows how to listen and how things should sound.. His amps are very good for the money if you are the type to purchase rather than build, and the plans for this new OB are available.. The question has been asked about the sensitivity on his forum so I'm just waiting to see the reply... Interesting design though
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Old 13th January 2010, 04:09 PM   #4
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With the extra surround he puts on the driver it should be lower sensitivity if anything, not higher. The specs are pure fantasy. Notice there's no +/- spec on the frequency response? That speaker does not do 38 - 22khz by any normal measurement standard. I'll even up the ante and eat your socks if it can do 38 - 22khz at +/- 10 db. And I'm sure he probably did measure 99 db at one meter in room at some single frequency but certainly not across it's entire frequency range.

It's all about marketing. Want some more? I like this one.

Quote:
If you're not sure your electronics are up to the level to use a speaker like this, feel free to buy one of our amplifiers.
Priceless!!!

Also notice his increasing penchant for referring to himself in the third person, also for marketing purposes.

Last edited by just a guy; 13th January 2010 at 04:12 PM.
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Old 13th January 2010, 04:13 PM   #5
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Gee, like blowing across a soda bottle for bass! They are pretty though. Probably a step up from most car systems, musical one note bass?
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Old 13th January 2010, 05:03 PM   #6
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Similar speaker to one of Tekton's designs, and almost as much Bee Ess.

And it's not even an OB; I clearly see a box and a port.
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Last edited by InclinedPlane; 13th January 2010 at 05:07 PM.
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Old 13th January 2010, 05:18 PM   #7
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Yah; Steve tends to wax hyperbolic. I recall the revolutionary phase plug that was a 13/16" socket.

P
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Old 13th January 2010, 05:24 PM   #8
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maybe its true that the driver sensitivity raise some in the medium band due to the backwave... isn't it? that would justify the 99db figure somewhere aroung 1khz...

do you guys think the bass reinforcement is additive or acts against the backwave diminishing the cancellation?

why did he use a driver with a Q so low as 0.27 except that he does them?

does a design like this, given that it can work to some extent have some real advantage over crossing to an helping woofer? i mean is it a problem to have a woofer in terms of coherence, harmonic integrity etc at frequencies so low??

using heavy DSP i can not get any sound pressure under 50hz from an AN super 8" alone on a 110cm wide baffle (trying to make a mono system ) withouth severe clipping
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Old 13th January 2010, 05:31 PM   #9
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I have read about this design and commented on its potential value in open baffle speakers only last week, on my thread as a means to filling in the harmonic tones that i felt were missing from my BAstanis clone. But whether it works or not is another matter. So my keenness on his design is not in its sensitivity and abilty to reach the deepest bass depths but its ability to fill in the missing harmonics in the middle order to make open baffles so much more acccuarte as well as live sounding.
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Old 13th January 2010, 05:56 PM   #10
DaveCan is offline DaveCan  Canada
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Well yes he sure likes his marketing, but I can't see him releasing something like this if it doesn't work... In almost everything that goes against the norm, or during the creative process, there will always be those that oppose etc.. Some things I do know about Decware is there are many who have used way more expensive gear that have sold off and now use Steve's stuff.. His new Hazen mod for the SV83 and EL34 raised some eyebrows, but seems to be well received by those who have heard it.. The anniversary Taboo Amp which I've owned since Aug 2006 raised some eyebrows and got some comments because of the grounding scheme, but it's worked flawlessly for me all this time, and I've yet to burn out any tubes that I have been using almost exclusively since I've owned it.. As for this new OB, I guess time will tell?, and it's something new and neat to watch and see

Last edited by DaveCan; 13th January 2010 at 06:00 PM.
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