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Steve's Comments about the DNA Horn (Read 19145 times)
4krow
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Re: Steve's Comments about the DNA Horn
Reply #15 - 12/01/11 at 18:33:59
 
Don't know if I am being silly but I have an 8" driver that I might like to build a horn like this for. Something tells me that I can't just adjust the width of the design and then everything will turn out just fine. If that is not the case, am I opening a can of worms here?  The driver is an Audio Nirvana full range range driver.
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stevef
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Re: Steve's Comments about the DNA Horn
Reply #16 - 12/06/11 at 03:56:26
 
I don't want to discourage you, but a horn requires some very specific design aspects to integrate well with a suitable driver.  You have some homework to do.  I am not familiar with your brand.  If the company caters to DIY, they may have published plans.  Good luck.

steve
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« Last Edit: 12/06/11 at 03:57:43 by stevef »  
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4krow
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Re: Steve's Comments about the DNA Horn
Reply #17 - 12/06/11 at 04:14:54
 
Actually Steve,   You couldn't be more right. Plus the fact, not just any driver can be used in a horn design. There are a number of horn sites that might be of some help. But one step at a time, cuz I'm right in the middle of another project anyways...
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stevef
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Re: Steve's Comments about the DNA Horn
Reply #18 - 12/06/11 at 17:14:35
 
4krow, I recently helped a friend design a horn sub for his home theater. It has a frequency range of 16-90 HZ and an efficiency of about 102 DB.  Seems perfect for a sub doesn't it?  

The box is just shy of eight feet tall and it's three feet deep, and uses two twelve in push-pull pro woofers designed for horns in a front loaded configuration. I have no idea how much it will weigh if built. With a couple hundred Watts of power, it will be able to play louder and cleaner than six to eight conventional boxes running several thousand Watts. The only other speaker I know of, with similar size and range, were the Cerwin-Vega monsters of the "Earthquake" movie. They actually damaged some theaters when used for effects. Older guys will remember them.

The moral of this story is remember to set reasonable design goals, choose drivers carefully. and make sure it can integrate into a living space. Please let us know what you design.

steve
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« Last Edit: 12/06/11 at 17:16:30 by stevef »  
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4krow
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Re: Steve's Comments about the DNA Horn
Reply #19 - 12/07/11 at 14:08:00
 
Steve, I actually heard those Cerwin Vega speakers you mentioned. They played at a theater showing the movie 'Rollercoaster'. That was over 30 yrs ago.  It was too much energy for the theater to handle, 'cuz there was all kind of rattles/buzzes etc.  Of course, I don't want anything like that for my system. In fact 30hz would be the target for the low end. These may be used with the Zob design only for slight augmentation.
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stevef
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Re: Steve's Comments about the DNA Horn
Reply #20 - 12/08/11 at 01:40:28
 
4krow, why not just build a pair of box subs?  They will be much easier to place in the listening room. The ZOB speakers won't have to be relocated in order to accommodate the subs. (The only time I've listened to the ZOB's, was when they were first introduced at a Zen Fest about 2-3 years ago. Unfortunately, one of the speaker wires was crossed, but labeled as if it weren't. Nothing sounded good that day.) I don't know how low they will play. In any case, sound below 80 hz is rather omnidirectional.  Whatever you decide, I strongly recommend multi-subs to smooth out room response. You probably can run your speakers full range, and use the subs to  reinforce and fill in the sound you already have. Please keep us informed.

steve
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4krow
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Re: Steve's Comments about the DNA Horn
Reply #21 - 12/15/11 at 19:50:16
 
Steve,
 There is a paper you might like to read at Common Sense audio. It is in the forum section and has some good insight on the whole subwoofer thing. I really enjoyed it, and it made me think about what exactly I want from a sub. I do notice that on some albums a sub is mandatory to get the best experience from the music. Once I decide on the type of bass appropriate for my room/system, it will be time to build. I have considered the WO32 because of it's implied quickness. I also want to experiment with a 3rd(center) channel.
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stevef
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Re: Steve's Comments about the DNA Horn
Reply #22 - 12/16/11 at 23:37:28
 
4krow,

Recommended reading, Floyd Toole http://theaudiocritic.com/back_issues/The_Audio_Critic_28_r.pdf and check out Seigfried Linkwitz at http://www.linkwitzlab.com/  I don't think there are any other audio practitioners who are in their league when it comes to loudspeakers.  Some of the information may be difficult at first reading, but there is a wealth of information not commonly available .

steve
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4krow
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Re: Steve's Comments about the DNA Horn
Reply #23 - 12/17/11 at 03:09:49
 
Steve, I love the Audio Critic. Wish I knew about it years before I did. As it was, I became so fed up with the regular press. They look more like sales brochures, and defend themselves as lawyers to those who question their ways.
 I just like quick ,to the point, opinion that is backed by experience and fact(not always will the two go hand in hand). It took so long to find a speaker design that I truly love. It would seem like less of struggle to find a sub to marry with them. It had better be a very quick and musical kind.
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stevef
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Re: Steve's Comments about the DNA Horn
Reply #24 - 12/17/11 at 19:12:38
 
4krow,
By fast bass, I assume you meas a woofer that works with little or no overshoot. That tends to be a problem, as woofers that play low tend to be muddy due to higher cone mass.
Steve
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4krow
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Re: Steve's Comments about the DNA Horn
Reply #25 - 12/17/11 at 22:43:18
 
Yes,  and that would be the reason that a bass horn design is one of my choices. Actually, to be more correct, not an actual bass horn, but a design that loads the cone of the woofer(allowing better cone control) and does have some kind of a throat flare. I am not going for the very last half of the lowest octave, just some enhancement when needed.
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stevef
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Re: Steve's Comments about the DNA Horn
Reply #26 - 12/18/11 at 03:16:08
 
It's going to be a bit of work. You can reduce cabinet size requirements by choosing a 30 HZ roll off as opposed to say 20 HZ.  More woofers are available too.
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stevef
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Re: Steve's Comments about the DNA Horn
Reply #27 - 01/04/12 at 17:44:23
 
@ 4krow.  Build a Ripole sub. Do a Google search, they are an easy project and are an inexpensive one too.
I am leaving this forum so I wish you well with your project. No further comments from me.

steve
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Lon
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Re: Steve's Comments about the DNA Horn
Reply #28 - 01/04/12 at 20:03:52
 
Best of luck Steve!
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4krow
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Re: Steve's Comments about the DNA Horn
Reply #29 - 01/04/12 at 21:31:19
 
Steve, I will also be leaving this forum, but will check in occasionally. Thank you for your input, and yes, I will look up the bipole sub you mentioned. I am always interested in new ideas.
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