Horn Plan |
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Mikkel
Young Croc Joined: 17 May 2013 Location: Huddersfield Status: Offline Points: 549 |
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It's not supposed to be ported, its just a normal flh. I think what he meant is that he couldn't find the 'hole' for the letterbox throat on the plans. They are there but not very easy to see. Im gonna upload a better picture of the plan with all the measurements. The one i posted at top was really just for perusal purposes.
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Mikkel
Young Croc Joined: 17 May 2013 Location: Huddersfield Status: Offline Points: 549 |
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Mikkel
Young Croc Joined: 17 May 2013 Location: Huddersfield Status: Offline Points: 549 |
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Im new to making plans and such so hope these are okay. Will upload cutlist when they are finished.
Edit: Made a tiny ajustment on these new uploads, as found a mistake on the originals. Also the braces in white are just for illustrational purposes. Can obviously be changed to suit whatever. Edited by Mikkel - 13 January 2017 at 3:35pm |
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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looks good to me
be good to see/hear how they get on
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me so horny me love you long throw
horn loaded for her pleasure |
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tv00
Old Croc Joined: 10 August 2009 Location: Denmark Status: Offline Points: 1886 |
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This is really interesting to me.
I've been playing around with the idea of modding the invader bin to fit pallet (120x80) I suggest you take a look at that thread, lots of sims & experiments with porting. What I prefer about the invader is that it has no 180 degrees bends, should smoothen response upwards. Also u could take a look at the Amano verion WSX. |
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www.facebook.com/babysoundsystem
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Mikkel
Young Croc Joined: 17 May 2013 Location: Huddersfield Status: Offline Points: 549 |
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Hi tv00. Ive read through the invader thread several times and definitely remember seeing amanos wsx somewhere, thanks for the suggestions, both have influenced my learning curve with horn designing.
Anyways i dont mean to be rude but there are plenty of ported horn designs out there. Designed up from the bottom specifically with that concept in mind, and i think it would be a shame porting this horn. Also i think -3dB @ 38 hz is plenty, and if you need more you need a bigger horn! The reason i used the s - style bin is because it has added length compared to the c - shape bin. At the heart of this design process was simplicity. Im no good in the workshop so wanted to have a nice easy box with a decent response down to 40hz. They were the princibles in mind when i started this. Edited by Mikkel - 14 January 2017 at 11:20am |
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nickyburnell
Old Croc Joined: 06 February 2005 Status: Offline Points: 4410 |
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Looking forward to pics, this looks so simple and good
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It's everything, not everythink!
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Con (S1S2)+Con (S2S3)+Con (S3S4)+Con (S4S5)+ Lp |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Why my hornresp is telling me 193cm ?
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Mikkel
Young Croc Joined: 17 May 2013 Location: Huddersfield Status: Offline Points: 549 |
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you forgot to add the Lp, hornresp doesnt do it for you. But to clarify what i meant was I dont know how to manually calculate how low the horn can go, mstep77 said the length probably wasnt long enough to support 38hz, I have no way of verifying hornresp's simsulations so can only go with that.
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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First rule of thumb is the horn has to be at least 1/4 of a wavelength long to provide decent loading. Therefore if you want 38Hz, you want a length of at least 226cm. Obviously, lots of other factors affect the final shape of the response curve, but that's one key thing anyone can look at when evaluating a potential design to see if it's at least "in the ballpark".
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Mikkel
Young Croc Joined: 17 May 2013 Location: Huddersfield Status: Offline Points: 549 |
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Excellent, thanks for that Dmorrison!
So being circa 218 cm it should support down to 39 hz, assuming there is sufficient mouth area to support that too. Which brings me to another question - I remember reading that a rule of thumb for mouth area is that the circumference needs to be same length as the lowest wavelength. now 870cm would be something like 12 horns stacked together! Is this correct or am I barking up the wrong tree? |
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