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2x10" vented horn idea

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Noud View Drop Down
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    Posted: 03 January 2018 at 7:09pm

Good evening everyone,


I’ve been working on a idea that has been popped op last week.

I’m still working on it but i’m very curious if this could work.

A few questions:


-Vented horn does it work this high?

-Where to place the vent? (front, back, horn throat)

-Will the BMS 4590 be able to work till 600hz with the P-audio ph-642?

-How can i measure the dispersion?



I know it needs a bit of eq but so far for me it seems promising.


Speaker:

-BMS 4590

-P-audio ph-642 horn 60x40

-Faital pro fh520 16ohm  (already used in a different cabinet)(edit 10-1-2018)



Whats your opinion?!Smile



Plot 2.0PI

Format  60x35x60cm








Edited by Noud - 10 January 2018 at 12:12pm
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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 03 January 2018 at 7:33pm
First thing I see is al lot of wasted space. The whole compartment around the driver is not neccesary with this layout.

Look at the design of Peter Morris
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Post Options Post Options   Thanks (0) Thanks(0)   Quote turbo7 Quote  Post ReplyReply Direct Link To This Post Posted: 03 January 2018 at 9:09pm
i like the idea but it is hard to have a shining top end with large CD horns regarding dispersion, as the high frequencies will beam. The BMS driver can work down to 600Hz. The lowest i have been going was 500Hz, would not recommend it but it worked.

It is also questionable if the 12" 56g cone can handle the pressure of 130dB @ 110Hz, how low would you want to go ? i have simulated the design and i got somewhere like you and there is no excursion limit before 95Hz Smile
But still, i guess compression here is not higher as with a phase plug. i would try it ! Lets see how much bass it can do as well Smile

Edit: Stop wasting space LOL



Edited by turbo7 - 03 January 2018 at 9:18pm
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Noud View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Noud Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2018 at 1:33pm
The Peter Morris looks very nice! but little bit wide for how i like to use them.
Thanks for the inspiration 

I already build a horn for the faitals and it seems to be handeling it without any problem.
But the cabinets are to big. A lot of wasted spaceTongue

compresion ratio 2.42 will be okay?
Where could i put the vent? front, back or horn throat

here's a update were less space is wastedSmile
measurements 60x35x51 cm


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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2018 at 1:57pm
In what setup are you going to use them?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2018 at 1:57pm
make it trapezoidal. remove the wall between the back chamber and the cavity with the HF driver in so that volume is used as additional rear volume. I'm not sure a ported horn is that easy to cross over to a sub because of phase response. also you may have problems physically fitting a port into this design. but if you have one put it on the back panel and make it as large as you can. flaring will help reduce chuffing.
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Noud View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Noud Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2018 at 2:24pm
I would like to make a frame so i can fly them and put them on an pole above a sub. (horizontal)
Thanks for the feedback i'm going to try to adjust it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2018 at 2:36pm
Originally posted by Noud Noud wrote:

Good evening everyone,


I’ve been working on a idea that has been popped op last week.

I’m still working on it but i’m very curious if this could work.

A few questions:


-Vented horn does it work this high?

-Where to place the vent? (front, back, horn throat)

-Will the BMS 4590 be able to work till 600hz with the P-audio ph-642?

-How can i measure the dispersion?



I know it needs a bit of eq but so far for me it seems promising.


Speaker:

-BMS 4590

-P-audio ph-642 horn 60x40

-Faital pro fh520 16ohm



Whats your opinion?!Smile


Plot 2.0PI

Format  60x35x60cm


Assuming you want a 100Hz crossover (approximately), that corresponds to a wavelength of 3.44m, so to remain in half space, the whole of the horn mouth could be no higher than 86cm above ground.

Otherwise, you're best to model mids in quarter space (4Pi).


That will probably mean you don't have enough mouth area to support going as low as you want.



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Noud View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Noud Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2018 at 2:50pm
you're right it needs to be 4Pi
It will do the low end because of the vent i assume.
It only gets a bit pointier.
making the mouth area bigger doesn't work unfortunately.

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FrederikMA View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FrederikMA Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2018 at 6:01pm
Using very high BL low Q driver will allow you quite some sensitivity from a small horn mouth. Problem is the max spl which is usually limited by the excursions peak (impedance spikes) of such a horn.
Personally, I have found it is better to do a shorter horn using a driver with good LF sensitivity in direct radiator mode.
Best regards Fred
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4AC View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 4AC Quote  Post ReplyReply Direct Link To This Post Posted: 05 January 2018 at 9:43am
I like this one Cool


Or try a two-way synergy horn design, f.e. the SynTripP. But that is some advanced speaker designing ;-)




Edited by 4AC - 05 January 2018 at 9:50am
uǝɿɿɐʌǝ6ɯo sı ʇsʞǝʇ ǝzǝp
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Noud View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Noud Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2018 at 1:54pm
Nice designs! I looked at synergy horn but like you said very difficult!
I worked out a design for 4Pi looks alot like the first plot.

One thing changed the horn is now RCF hf94 and driver BMS 4593HE 1,4" Coax
Space wise its not the best but i think it will work. (600x350x550)
I only need to calculatie the chamber and then fit the vent maby under ande above the horn.
When i'm satisfied with the design there will be a test.
Ad some flyware and polemount extra handels

When flying the speakers in some rooms the ceiling wont be that high so then the 2Pi will come closeTongue

What do you guys think?Smile




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