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Design of 2x18 Front Loaded Horn |
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adambomb 
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Joined: 10 April 2006 Location: United Kingdom Status: Offline Points: 3220 |
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 Posted: 01 November 2007 at 9:28am |
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yea.. would be like having say and 1850 and a CV bin (extreme example) sat next to each other covering the same frequency range.. not gunna be good. |
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Mark James
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Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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Posted: 01 November 2007 at 11:55am |
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yes each drivers sees a different horn and will have a different responce, and be out of phase and time with each over. also blah bla blah
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me so horny me love you long throw
horn loaded for her pleasure |
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levyte357
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Joined: 10 May 2004 Location: UK, London Status: Offline Points: 11743 |
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Posted: 01 November 2007 at 12:13pm |
Yes Mykey, see that quite clearly. Trying to avoid Lab method of mounting drivers vertically at center of spiral horn, as this would complicate build considerably. Simplest solution to the above, would be to have drivers side by side; but that would result in cab 36" wide, similiar to tuba. Would it be possible to arrange the 2x drivers in separate identically sized chambers, but firing into a common chamber at the start of the horn? Edited by levyte357 - 01 November 2007 at 12:45pm |
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"Who am I? I'm the guy who does his job.. You must be the other guy".
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jsg mashed
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Joined: 18 May 2007 Location: United Kingdom Status: Offline Points: 305 |
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Posted: 01 November 2007 at 12:47pm |
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Just apply delay to the driver with the red arrow, enough to compensate the path difference vs. the blue arrow. Maybe also use a lower low-pass freq on the red driver (eg red up to 100Hz, blue up to 180Hz)
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...because Good is Dumb.
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Mark James
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Posted: 01 November 2007 at 1:03pm |
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yeah you are effectivelyusing two different horns, the phase issues would be horrific id imagine, it wont just be delay issues, group ddelay would go awol id imagine?????
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me so horny me love you long throw
horn loaded for her pleasure |
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levyte357
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Posted: 01 November 2007 at 1:23pm |
How about compromising layout/cab by arranging drivers as below, (Looking at cab from above speakers). Also Adjusting horn length to ensure "lead" driver sees 7.5 ft horn?  Thinking this would reduce path Difference seen by both drivers to approx 9" instead of 18"? Edited by levyte357 - 01 November 2007 at 1:39pm |
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"Who am I? I'm the guy who does his job.. You must be the other guy".
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mykey
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Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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Posted: 01 November 2007 at 1:38pm |
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Your gonna have to abandon that idea Lev, I'll PM some sketchs to you that you can have a play around with
JSG
 , who are you really? |
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levyte357
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Posted: 01 November 2007 at 2:37pm |
Mykey cheers for input and PM's... But, World already has 2x12 labhorn, short horn 2x18 FK1's/turbo's, long horn 1x18 cabs . (WSX/Quake), short horn 1x18 (186/1850 horns). So it will be 2x18, on approx 7.5ft horn  .Edited by levyte357 - 01 November 2007 at 2:41pm |
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"Who am I? I'm the guy who does his job.. You must be the other guy".
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mykey
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Posted: 01 November 2007 at 2:47pm |
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Ok I'll put up the '2' sketch's I did then, that are none of the above these are only rough guy's so don't take the mick, I know you guys are thinking...tit's
 Edited by mykey - 01 November 2007 at 2:50pm |
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mykey
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Posted: 01 November 2007 at 2:49pm |
 slightly adjustedversion of the original mistake Edited by mykey - 01 November 2007 at 2:51pm |
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mobiele eenheid
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Posted: 01 November 2007 at 6:02pm |
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As the drivers are relatively small compared to the frequencies the reproduces would they not act as a single driver?
Wkr Johan
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adambomb
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Posted: 01 November 2007 at 6:13pm |
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Lev.. take a look at Centauri s website : http://www.centauriaudio.com.au/diy/hornfold.html
Brilliant Stuff! and a real help in designing folded horns.
If I was trying to do what your trying to do.. I would use the info in the above page with hornresponse and autocad to get the box I wanted.
Do something new and different.. not a re-hashed double box of a known commercial design.
You could make something really unique with a bit of work!
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mykey wrote:
