Kick/midrange horn design

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   Hey all,
I'm designing a mid/kick horn for a diy venue that friends of mine run and I was wondering if anyone could give me some feedback. The design objectives are as follows:
100-900hz approximate usable bandwith with good emphasis in the kick register (Skram subs below and Altec 511E above) Depending on how the Skrams sound I might be able to cross over higher, like 110hz
Single 15inch driver (I really like the sound of the Oberton 15L400 in another horn I built, so I'm designing around that. It has a very pleasant midrange voice and plays up to 1.5k in the 40cm exponential horn)
Near 130dB output at 1m. The room is around 150qm and I'd like to use 1 per side
Size is not really an issue, but two people should be able to lift it
Approximately 90 degree horizontal coverage to match the Altec radial horn 
How does this design look? Is the change in flare rate too abrupt? Can I expect the horizontal dispersion to be roughly the same as the angle of the exit flare?
Are there other drivers I should consider? Hornresp shows the PD153c002, for example falling off rapidly after 500hz, but AJhorn shows good HF extention like the Oberton. The Oberton has only 3.5mm Xmax, but I suspect that's part of the reason it's such a good midrange. 

Thanks so much!

The mouth is 109cm x 50 cm

Edited by Mitzi_ssd - 10 October 2023 at 4:22pm

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Mitzi_ssd Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 15 September 2023 Location: Berlin Status: Offline Points: 3	Post Options Post Reply Quote Mitzi_ssd Report Post Thanks(0) Quote Reply Topic: Kick/midrange horn design Posted: 10 October 2023 at 3:41pm
	Hey all, I'm designing a mid/kick horn for a diy venue that friends of mine run and I was wondering if anyone could give me some feedback. The design objectives are as follows: 100-900hz approximate usable bandwith with good emphasis in the kick register (Skram subs below and Altec 511E above) Depending on how the Skrams sound I might be able to cross over higher, like 110hz Single 15inch driver (I really like the sound of the Oberton 15L400 in another horn I built, so I'm designing around that. It has a very pleasant midrange voice and plays up to 1.5k in the 40cm exponential horn) Near 130dB output at 1m. The room is around 150qm and I'd like to use 1 per side Size is not really an issue, but two people should be able to lift it Approximately 90 degree horizontal coverage to match the Altec radial horn How does this design look? Is the change in flare rate too abrupt? Can I expect the horizontal dispersion to be roughly the same as the angle of the exit flare? Are there other drivers I should consider? Hornresp shows the PD153c002, for example falling off rapidly after 500hz, but AJhorn shows good HF extention like the Oberton. The Oberton has only 3.5mm Xmax, but I suspect that's part of the reason it's such a good midrange. Thanks so much! The mouth is 109cm x 50 cm Edited by Mitzi_ssd - 10 October 2023 at 4:22pm

VECTORDJ Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 585	Post Options Post Reply Quote VECTORDJ Report Post Thanks(0) Quote Reply Posted: 11 October 2023 at 4:44am
	A+

Meat Substitute Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 10 July 2020 Status: Online Points: 125	Post Options Post Reply Quote Meat Substitute Report Post Thanks(0) Quote Reply Posted: 12 October 2023 at 10:58pm
	That's not got the directivity in the sim yet. Once you add that you'll see that it goes a lot higher.

Mitzi_ssd Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 15 September 2023 Location: Berlin Status: Offline Points: 3	Post Options Post Reply Quote Mitzi_ssd Report Post Thanks(0) Quote Reply Posted: 13 October 2023 at 1:06pm
	ha, thanks Meat Substitute, you're right. I'm just starting to understand the directivity feature of hornresp. It doesn't work for multiple segment horns, so I simulated an exponential horn with similar dimensions ( damn this thing is huge ) When simulated on axis, hornresp shows this massive peak around 400hz (reducing the compression ratio helps it mellow out a bit, but still there) Ajhorn, which people say is very accurate for mid/high shows a much more reasonable on axis response... Anyone have a hunch how this will behave in real life, with the two segments and wider horizontal dispersion? Is there any way to insure a flatter on axis response?