21" ported horn (Othorn competitor) |
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Matty309
Registered User Joined: 13 May 2019 Status: Offline Points: 116 |
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Posted: 26 January 2020 at 4:03pm |
Hi all,
After spending much time thinking about building the othorn and spending £550 on a driver i thought i would design myself a ported horn with the RCF LF21n451. A £360 driver. my goals of the design are to have the extension that the typical reflex enclosure has whilst still preserving the impact and "throw" of a horn. might be worth noting i have previously designed and built 2 dual 15" folded horns to sit on top of these but im not sure if id even need them with this design. Spending a short while on hornresp i came up with the following as shown in the images, performing similarly to the othorn whilst being significantly easier to build. I would design the enclosure on solidworks and it would probably be similar to the Void acoustics Nexus XL in terms of shape and layout. Also with a bit of eq you can increase extension to have a f3 @ 30hz This is the results at Xmax, 1.25KW into 8ohms it may be worth mentioning if you use a driver with a higher BL and Xmax (B&C 21) you can put about 2KW into the driver resulting it a 135db continuous output across its operating range. See what you guys think. Thanks Edited by Matty309 - 28 January 2020 at 8:35pm |
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VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 513 |
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A+
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VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 513 |
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Layout drawing???
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Matty309
Registered User Joined: 13 May 2019 Status: Offline Points: 116 |
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haven't got a specific drawing yet as still deciding. but it will look like something similar to this..
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MarjanM
Old Croc Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7810 |
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According to that HR info you provided, the box should be about twice the size of the one you are showing there.
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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Matty309
Registered User Joined: 13 May 2019 Status: Offline Points: 116 |
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I would like to know, where did you get the information from as your saying 900 litres for a single 21?
The total volume of the enclosure in the simulation is 450 litres . 240litre rear vented chamber plus a short horn approx 1.3m. The drawing was crudely done just for a representation of my idea. Thanks
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MarjanM
Old Croc Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7810 |
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The horn length on that box there is about 70cm. You need it to be 131cm, that is almost twice the length. Back chamber also is very small on that drawing. Probably about 70-80 lit. You need 240lit.
Edited by MarjanM - 29 January 2020 at 1:02pm |
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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Matty309
Registered User Joined: 13 May 2019 Status: Offline Points: 116 |
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Yeah I know that why I meant it was for s rough representation. I will increase depth and height on box to extend horn and increase volume
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VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 513 |
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A+ I always liked horn subs with ported rear chamber. More bass on the dance floor with punch compared to sealed chamber horn subs. VECTORSONICS
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VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 513 |
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This horn should be able to fit in a CV Earthquake size 36 x 24 x 36 inch box????????
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cravings
Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7441 |
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kevin had a thread a couple of years back might be of interest to you
https://forum.speakerplans.com/21-ported-horn-design-idea_topic102437_page1.html?KW=othorn |
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MarjanM
Old Croc Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7810 |
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Horn mouth is quite small, so probably not that big. More like Martin WMX.
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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