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35-100hz ported/hybrid horn

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VECTORDJ View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote VECTORDJ Quote  Post ReplyReply Direct Link To This Post Posted: 26 March 2020 at 4:24pm
Hi, Have You tried the B @ C TBX100 18 inch????? VECTORSONICS
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luthier View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 08 April 2020 at 1:47am
Originally posted by Elliot Thompson Elliot Thompson wrote:

The loudspeaker is the limitation. It is easily shown in the TS Parameters. Because you are using Horn Response which uses parameters that do not show the weakness of a driver when constructing a reflex box, Horn Response does not tell you why you have such a peaky response. The ideal enclosure size for the driver in question is 7 cubic feet. When you take into consideration other drivers that are smaller in diameter that offers similar TS Parameters as the driver in question, it becomes obvious the driver's diameter is the limiting factor why it cannot take advantage of a large enclosure.    

The driver will offer a good response for horn loading and an adequate response for a reflex box. That is the price you pay when aiming for the best of both worlds using one driver than can execute both tasks.

All in all, the driver is at it's limit (37 Hertz) on how low it can go while maintaining a flat response. Because you are tuning the driver lower than it's limitation, you will attain a sharp peak followed by a sharp decline.

The overall frequency response is pretty much standard of a double-tuned band pass box.

 

Best Regards,

 

 


This, really does add up with what I have been coming across in hornresp. Thanks for the info, food for thought. 

I'll drop in an update on the progress I've made later on.
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Elliot Thompson View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Elliot Thompson Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2020 at 3:59pm
One of the arts of loudspeaker design is understanding the limitations of not only the enclosure, but the loudspeaker as well. It is the primary reason why some designers acquire end results that many dispute are not possible. Many of times, the naysayers have a lack of understanding on what the TS Parameters are saying as a whole and, focus solely on one parameter.... Xmax. 

All the calculated TS parameters work together as a team to deliver the end result. Bear in mind xmax is not attributed to the calculated TS Parameters. All xmax tells you is how far the cone will move. You could feed the driver 20 Hz in which it falls within the linear xmax range. However, if the loudspeaker cannot produce sound at 20 Hz, the end result is having the loudspeaker cone flapping around in the air. 

Best Regards,   
Elliot Thompson
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