Bending mid horns |
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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i personaly cant see any reason to bend/fold a horn playing down to 1khz i mean that needs to be like less than a ft long? at most id imagine [too drunk to do exact maths atm but im sure its less than a foot?] do you realy need to bend it?
not saying you dont need to just asking
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me so horny me love you long throw
horn loaded for her pleasure |
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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By narrow you mean remain conical also. Id imagine an exponential bend may have some effect on directivity even if only narrow. Most of the bent horns ive seen are fully exponential, no good for arraying so I understand. Just wonder how a conical transition is possible in a bend and immediately after if your aiming for constant directivity. |
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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You're also too drunk to do exact reading at the moment apparently OP wants their mids to play from whereever their basses cut off up to 3-4kHz, not down to 1kHz. |
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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Have you looked at Peter Morris's DIY 3 ways on soundforums.net? He reckons that a 12" mid horn cab get up to about 600Hz usefully with a single bend, and used BMS coax compression drivers to reach down to meet that. Probably a lot more practical than stretching the (low)mids another 2.5 octaves higher. HTH, David.
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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Ive heard its possible to get down to 370hz with a bms4590 and a straight horn just 350mm in length. Will find out soon as im making one.
Think genome is looking for longer throw. Edited by SouthwestCNC - 13 February 2017 at 4:02pm |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Ofc exponential bend will have bigger patchlength differences but its not only "S bend entry" that counts but the whole design.
Do you think it will move the center of bend exit?
Yes thats an option but... thats basicly mine current design. Instead of 12" is 8" predicted +-100Hz to +-1kHz. So Instead of the current 3"VC 2" throat I could put there coaxial BMS. I wanted something else. Edited by gen0me - 13 February 2017 at 8:14pm |
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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I retract my statement, I received an xt1465 horn today and that is completely exponential yet its cd is good. contrary to what ive read. I'm just learning about this stuff hence my questions. Comsol might shed some light on it. |
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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Here is a image courtesy of teunos which would suggest it is possible if from the exit if not smoothly terminated due to reflections and I would hazard a guess to say this may happen if the bend is too tight or un smooth ie one horn is then transitioning into another but could be wrong.
Edited by SouthwestCNC - 13 February 2017 at 9:26pm |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Oh thats beautifull visualisation.
Whats the program? |
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_djk_
Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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https://www.youtube.com/watch?v=jPhONWr1Njo
WE32A, as in the Altec Model 15 http://www.audioheritage.org/vbulletin/attachment.php?s=891d6879c4ffbfc7010196f507fa82c7&attachmentid=53177&d=1317961911 Meyer Sound 833 (patented) http://medias.audiofanzine.com/images/normal/meyer-sound-833-834-553021.jpg (foam in the bend) Edited by _djk_ - 14 February 2017 at 1:20am |
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djk
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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Comsol |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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http://www.audioheritage.org/vbulletin/attachment.php?s=891d6879c4ffbfc7010196f507fa82c7&attachmentid=53177&d=1317961911 Meyer Sound 833 (patented) [/QUOTE] How does it sound? What is comparison to straight horn and what is the high freq cutoff? Unity comes into mind. Hmm i think I saw HF drivers mounted like this:
What is foam in the bend for? So something like this
wont happen? |
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