Horn resp Front loaded horn

[OliverHone]

Hi

I have a few questions regarding the placement of a driver in a front-loaded horn.

In horn resp, it sims it as the driver firing directly into the mouth of the horn i have attached an example pic.

However I often see in front-loaded horns that the driver is placed on the side of the horn and fires into the side/throat I assume this is in order to fit the driver in a reasonably sized box (WSX Plans attached as an example, as the plans show the driver shoots into the side of the horn and has a slight gap which I assume is based on compression ratio. Does the throat make it as if the driver is shooting directly into the horn, if so what is the best way to design this so it works as expected?

I'm wondering if anyone has any advice/knowledge on how best to do this without affecting the response of the horn.

Hope this makes sense.

I am fairly new to horn/cabinet design so any help or advice is appreciated.

TIA
Ollie

 

[DrBoar]

When the wavelength is longer than the dimention of the driver it really does not matter if it facing front or "sideways" At 100 Hz the wavelength is 3 meter and at 1000 Hz it is 0.3 meter. So for a bass horn like the one above used to say 200 Hz or so it does not matter as the whole cone is a point compared to the wavelength. For something lika a midbass horn 100-800 Hz then throat geometry becomes important end for a midrange horn even more so.

So a straight horn of infinte length with a forward facing driver will work as expected
Folding and having sidemounted drivers will work as expected up to a certain frequency and then deviate.
Shortening the horn will make the response more uneven also in the lower registry.

The horn above is probably a good bass horn, lengthening the horn by a meter would improve the bass but not so much and the volume would double. So there are always tradeoff'between different features.

 

[OliverHone]

When the wavelength is longer than the dimention of the driver it really does not matter if it facing front or "sideways" At 100 Hz the wavelength is 3 meter and at 1000 Hz it is 0.3 meter. So for a bass horn like the one above used to say 200 Hz or so it does not matter as the whole cone is a point compared to the wavelength. For something lika a midbass horn 100-800 Hz then throat geometry becomes important end for a midrange horn even more so.

So a straight horn of infinte length with a forward facing driver will work as expected
Folding and having sidemounted drivers will work as expected up to a certain frequency and then deviate.
Shortening the horn will make the response more uneven also in the lower registry.

The horn above is probably a good bass horn, lengthening the horn by a meter would improve the bass but not so much and the volume would double. So there are always tradeoff'between different features.

Cheers thank you very much, I have re simulated it as a offset driver placed in the first length so it’s more of an accurate simulation, it’s a low/mid range kick horn planning to be run from 80-150 Hz so I as you say the shortest wavelength is larger than the length of the horn so shouldn’t have any adverse affects.

Thanks for the reply much appreciated 👍

 

[DrBoar]

Sorry to be nitpicking. A wavelength longer than the throat dimention of the horn. So in the order of 0.3 to 0.4 meter for a 12-15" driver. By larger I mean at least 4 times as large so for the 15" it is frequences below 200-250 Hz.

Best of luck with the builds👍

 

[OliverHone]

I'm not sure I understand what you mean? The horn is 1.1m long and the highest frequency ill be running it at is 150Hz so the shortest wavelength is 2.28m do you think this will be ok since the length of the horn is more than half the shortest wavelength?? I see you say it should be 4x larger but surely that is quite impractical.

This is only my first attempt at properly designing and building something using horn resp so appreciate the help.

TIA

 

[AllenB]

Moved to Multi-Way.