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In the Forum: Horn-Loaded Speakers
In the Thread: Barn Conversion - James' Project
Post Subject: Actually the “Wrong Vowels” is another subject.Posted by Romy the Cat on: 2/5/2007
 op.9 wrote: |
| One thing nobody has mentioned is using the room’s corners. Is this a no no? I’ve been trying use McBean to model a horn exiting into the corner – with a middle ‘mouth’ about 1m squared - and using a conical approximation as the room corner – with some nominal (very large) mouth size. Am I right that the corners are basically a conical expansion? But. McBean crashes with these numbers and takes my whole computer down with it. Quite dramatic really. Is this model at all relevant? I can’t see why not. |
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I do not believe in horn prediction programs. They are conditionally useful for MF but for bass they are completely bogus. My experience with various deaf idiots from AA (Bill Fitzmaurice, Wayne Parham and the rest of dirt) suggested that those horn prediction programs are crouch for brainless cretins who have no hearing or awareness to assess results and to act upon own senses. Also, would it possible the no one mention to your corners because with your objective of 20Hz -30Hz horn you are way beyond the dimensions of anything that could be called architecturally “ a corner”?
| op.9 wrote: |
| I’m becoming increasingly tempted to build some MORON horns. With a bit of luck, they might be useful. If not they can always just do the bangs and thumps for some ‘home theatre’ system that I’m unlikely to install. Last summer I pointed some 45hz tractrix horns at the corners and got good response down to at least 30hz. Setting the levels nice and low, I still got a very good ‘feel’ to the music. More ambiance and more space. Everything was moronic in this test so I should discount it. But I can’t help wondering… |
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Well, a 45-50hz horn if VERY different horn then 20Hz horn. In fact I very strongly encourage your to go for 45-50hz horn – it is THE way to go it you have space. The horn with pretended “open bottom” is VERY different story….
| op.9 wrote: |
| Digital delay. Yes, I know – a big topic. I’ve been listening recently to my UltraCurve 2496 through headphones used just as a delay. Digital in and Digital out. I cannot hear any change in sound at all. I've really tried. Luckily – but sadly – I’ve never owned any LPs in my life, so I’m not worried about an extra a/d-d/a in the chain. So I’m not ruling out digital delay completely . . . . |
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Well, if use digital only then why don’t you use two DA converters? This is a perfect problem-free solution. Any civilized electronics specialist should be able to stick into any of your DAC a temporary memory that would delay the stream for a few milliseconds. It will have no even theoretical influence to Sound.
| op.9 wrote: |
| I’m worried. Romy – You say Line Arrays ONLY work on the long room dimension? Can you elaborate? Intuitively I can’t see why. And this was my Get Out Clause. This is worrying. |
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Good question. I do not know the answer, I am sure it should be. It juts was my experience of dealing with my LF arrays and listing a quite a number of others. Take RTA and move them across short and long walls. The short wall immediately crates huge response anomalies. It should be some kind of reasons for it. There is a good article at my site by John Murray:
http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=3013#3013
John, has a public email (in the and)… Try to ask him it should be some kind of explanation for it…. If you leans then please post it…
| op.9 wrote: |
| And another question. I’ve learned the slow way that funny mouth shapes and bends in horns really screw up things in seemingly unrelated parts of the audio spectrum. Is this still true of low bass? |
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James, it all depends. The art of horn bending is very bizarre and at LF particularly it is completely not know. I have no experience with it. Evan the people who do…. The LF are so much effected by room, geometry, boundaries and many other sources that it is very hard to extrapolate where the problems come from the bends and where they come from other reasons …Rgs,
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