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21" ported horn (Othorn competitor)

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Matty309 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Matty309 Quote  Post ReplyReply Direct Link To This Post Posted: 29 January 2020 at 3:57pm
yes should fit nicely, maybe even a bit smaller, whilst digging considerably deeper than a regular folded horn. Not only that it will be easier to build as the horn length is only 1.3m
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Matty309 Quote  Post ReplyReply Direct Link To This Post Posted: 29 January 2020 at 3:57pm
hi yes thanks already been in contact!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Matty309 Quote  Post ReplyReply Direct Link To This Post Posted: 29 January 2020 at 4:16pm
Is there any benefits to using a baffle with a area cut out placed right up against the driver than using a  throat chamber as shown in the two images. Accuse me if that's not the correct terminology.

I Guess using a plate removes the need for a throat chamber and just starts with the beginning of the horn with the area to get a desired compression ratio ?

thanks
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Post Options Post Options   Thanks (0) Thanks(0)   Quote VECTORDJ Quote  Post ReplyReply Direct Link To This Post Posted: 29 January 2020 at 9:48pm
The top drawing above shows a "standard" throat design and the photo shows a "turbosound turbo bass" throat design. Vary Vtc from small to large to see what this air volume does in the horn program????? VECTORSONICS
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jo bg Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2020 at 11:28am
Have you considered port velocity? You can SIM It in hornresp selecting output/Port and then particole velocity. Your Port Is 1/4 of driver sd, seems  small.High Port velocityy Means noise and usually higher Port compression.
Once you consider that you Need a biggerr chamber, longer horn and smaller mouth than the design you showed, you Will realize that you need a different layout.
Take a look at Ricci skram and skhorn projects.
Posting only equalized response Is not so helpful....
Be aware that real tuning Will probably end up a Little lower than simulated, and the low corner Will probably have a downward slope (less low end ,take a lookat the semiinductance model.)
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Matty309 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Matty309 Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2020 at 11:58am
Hi yes I have realised this soon after posting however I have redesigned the layout and changed it to an offset driver horn instead yeilding much better results. And a different port area thus reducing port velocity.

So you mean it will have a lower tuning frequency but it will roll off faster? 

Also will using the lossy le model more accurately represent what my driver will do? It it's of course quite a large voice coil so I suspect it while 

Thanks 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2020 at 12:51pm
put large flares on both ends of your ports. it means you can reduce the port area a little and stop your ports getting stupidly long - which has it's own problems with pipe resonance, and fitting them in the box.
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