help with designing kick |
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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Define 'this phenomena'.
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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Indeed, looks like a fairly standard bunch of horn characteristics to me and broadly what you'd expect for that style of enclosure.
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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Hi, s2 seems still off, in your design the horn is restricted at that point, while the flare is straight, and as you are not accounting for volume inside cone of drivers in vtc, you should add it there, so it should grow bigger than straight flare there, not smaller..
In my mind kicks lives at 90 hz so you see from your frequency response why i was doubtful.
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totalAudio
Registered User Joined: 29 October 2015 Status: Offline Points: 27 |
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sorry I forgot to post the pic
ive realised that this disappears with the correct filtering. |
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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That cames from the offset driver, you have 20 cm from driver to startof horn, wave will start from driver bounce on start and go back to horn exit.
At lower frequencies waves are big so still sum. At 400 hz wave is long something like 80 cm, so when it meets the driver again after 40 cm of travel it has exactly half wavelength delay, so it is 180 degree outof phase with wave of same frequency and this means cancellation. A 100 hz wave is 3.4 meters long so it will sum postively, it will cancel with 85 cm offset (happens often with speakers near walls)
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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Those nulls are where the horn path length is such that you get a reflecting wave from the mouth (or other feature) back to driver such that it is out of phase with the original cone movement. The original and reflected waves cancel each other out.
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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Try to sim same horn but nd confoguration , wihout offset and that dip will disappear.
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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This is a physical issue of the horn, actually something filters can't deal with.
If you put more 400hz in with eq it will cancel out sameway, as you increase power also in the cancelling wave. You can only push it higher by putting cones as close as possible to start of the horn.
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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However Hornresp tends to over exaggerate those dips.
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keith192001
New Member Joined: 06 June 2020 Location: UK Status: Offline Points: 6 |
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Hey can you help me design a horn enclosure? I have no idea how to use hornresp, i have a Massive audio hippo xl 15'' @ 2000w rms sub, i want an enclosure like the one in the image below;
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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Please start a New thread as this has nothing to do with the original post.
Just had a quick glance, but with that high qts this is not a horn driver. Sealed box is your best bet i Think, and easier to build. Download winisd, very easy to use, and input the t/s parameters you find on manufacturer site to get an idea of what to Expect and find out needed volume.
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totalAudio
Registered User Joined: 29 October 2015 Status: Offline Points: 27 |
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Ok after a little bit of messing around (again) heres what I have:
Not sure where to go with my rear chamber volume or vtc/atc? and does it look reasonable so far? any help appreciated Edited by totalAudio - 06 June 2020 at 10:35am |
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