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In the Forum: Horn-Loaded Speakers
In the Thread: Evaluation of tractrix curves based on visual surface reflections.
Post Subject: 10-feeter hornPosted by Romy the Cat on: 6/30/2006
 guy sergeant wrote: |
| How would such a time delay manifest itself in the resulting sound? |
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It is like driving a car where one of the wheels is larger size and rectangular.
| guy sergeant wrote: |
| Would the benefits of having a hornloaded AK151 not outweigh this or would it just sound too wrong to be interesting? Have you had the opportunity to listen to such an attempted system? |
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Sure I did, not with Vitavox though… OK, now pretend that this rectangular wheel is better quality and has greater traction with the road then other 3 wheels….
| Jessie wrote: |
| … but are going to be something like 10 feet in length… |
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Jessie, a few words of wisdom sort of speak if you go for you’re your 10 feet projects.
- Mass, mass, mass and mass. If your 10 feeter weights less then I would say 400 pounds then you did it wrong. The heavier is better. There are plenty of the bid wooden attempts out there but they all sound with identically – the sound of the wooden panels resonating. So, have braiceing and mass loading.
- Make the back chamber as crazy as strong as you can afford, use tank metal if you might. A 15” driver for instance in a smallish back chamber enclosure would generate a tremendous pressure. If you do wood then I would estimate that you would need at least 5”-6” of wood thickness and preferably with metal braiceing to hold this pressure properly. If I do it personally I would probably go for a concrete back chamber...
- For 10 feeter forget about the geometry of the horn. Exponential at those frequent would work as well as tratrix. Most people cheat and go for combined horns where the cure does not comply with the specific rule but follows the demander of their real-estate. It is not necessary bad as at those frequencies the room modes will severally overwrite or better to say modify what your horn will be doing.
- In the end I see 3 major problems that you will need to work with: room coupling, low pass filtering and time delay. As far as I concern all of them are quite hard to deal with. The first is might not be a problem but you will be able to assess it only AFTER you made the pair of your horns and to make any changes then will be damn costly.
Anyhow, it will be fun to watch you doing it. I very much look forward to….
Rgs,
Romy the Cat
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