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21" Ported Horn design idea |
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Arcy12 ![]() Registered User ![]() Joined: 07 September 2018 Status: Offline Points: 12 |
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Hey dude I'm keen to put one of these together, could i have a cut list and routing details.
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NiToNi ![]() Registered User ![]() Joined: 17 February 2017 Location: London Status: Offline Points: 17 |
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+1
Would love to have a go at this mate! ... although slightly lower corner at 27 Hz would have been perfection
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Fracture_clinic ![]() Registered User ![]() ![]() Joined: 01 November 2018 Location: Norwich Status: Offline Points: 113 |
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I cant install Hornresp on my machine (admin issues) can anyone speculate these changes please?
1) larger chamber all else the same 2) larger chamber and horn extended through 90 degrees (over the port exits) and along width of box. Assume ports are relocated + ignore external dims for now. 3) Same as above but with chamber remaining the same. Asking a lot I know - until lockdown is over I can't jump on a buddies laptop to try myself. Not asking for sims just interested in bouncing ideas around. TIA
Edited by Fracture_clinic - 14 May 2020 at 1:40pm |
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bob4 ![]() Old Croc ![]() ![]() Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1791 |
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Kevin, we would like to build your ported horn, any chance of getting a set of plans?
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smitske96 ![]() Young Croc ![]() Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1036 |
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Looks like a similar idea: http://https://www.seeburg.net/en/customsolutions/ps-sub/175
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smitske96 ![]() Young Croc ![]() Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1036 |
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Am I correct in thinking that they tune the BR port high and the horn low?
In all other quick sims, I can not reach such 2,83V sensitivity figures.
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toastyghost ![]() The 10,000 Points Club ![]() ![]() Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10894 |
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I would treat the Seeburg as a variant of tapped horn, rather than a rear ported horn. It’s very dark in the renders, but I have a feeling that the driver ‘vent’ also opens into the horn mouth based on a similar design I saw elsewhere. Also that’s the peak sensitivity value in the specs. Not the average. Edited by toastyghost - 29 November 2021 at 9:53am |
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smitske96 ![]() Young Croc ![]() Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1036 |
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Yes, but it even has a similar/higher sensitivity @50Hz than for example a BC218.
According to the measured response peak sensitivity is around 111/112dB @+-150Hz, which does fall out of the desired bandwidth but still is pretty high. If I may ask, which design are you talking about regarding the vent also tapping in the horn mouth?
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bob4 ![]() Old Croc ![]() ![]() Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1791 |
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Isnt that very unlikely, since you need lab horn size for real 30 hz horn loading (in multiples of four!!) I would have guessed the reverse
![]() Edited by bob4 - 29 November 2021 at 4:29pm |
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MarjanM ![]() Old Croc ![]() ![]() Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7742 |
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That Seeburg box looks like the old Martin Audio ported horns.
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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AlphaC ![]() New Member ![]() Joined: 02 February 2022 Location: Germany Status: Offline Points: 2 |
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Which Martin model do you refer to? I'm not aware of any similar design.
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smitske96 ![]() Young Croc ![]() Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1036 |
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@bob4
2,6m seems doable with those dimensions.
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