Limitations of 18" Hog Scoop Design |
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Simplify
New Member Joined: 04 October 2017 Status: Offline Points: 2 |
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Posted: 04 October 2017 at 2:54pm |
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As a learning project I've decided to design my own boxes, basing the design on the Hog Scoop 18", I was wondering what limitations these designs have?
I'm lucky enough to have access to a full workshop including wood steamers and CNCs through University. Given fairly limitless resources do you guys have any idea on how to refine the design? My initial idea is to smooth out the transmission to give a more constant expansion, would this give any increased performance? |
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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Limitless?
...then why not build the box one slice at a time! On a large panel the size of the side panel of a hog draw the original horn path. THEN once done usinging a pencil smooth out all the internal corners and the entire path. This is now your template for how you want it to look internally. Now make about 30 copies and glue them on top of each other... stick on side panels and you have a hog with a perfectly smooth horn path and you can dictate th expention as you go. And use all your uni equipment to cut and copy all these panels. Yes it's a tone of wasted wood and very time consuming BUT you will end up with a near perfect response. |
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If it sounds like a gorilla is trying to escape, turn it down.
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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The limitation is being a scoop so always going to get the dip between 50-70 hz from being rear loaded or like rog explains a 21" driver will move the dip lower at 40-50hz.
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JonB67
Young Croc Joined: 22 April 2016 Location: UK Status: Offline Points: 1376 |
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If you were going to do that mini surely you'd be better to make a former the custom laminate your own curved ply from veneers?
How much advantage would a smooth path get you? |
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JR.junior
Old Croc Joined: 14 December 2009 Location: Slovenija Status: Offline Points: 1789 |
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dip!? 18" scoop has boost at 50-70Hz!! deep is around 110Hz..
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Support the scoop technology, larger mouth plays louder!
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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Sorry 70-90hz range is common to get dip with scoops from being out of phase.
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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Only if you were running it up higher would have been my thought.
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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Edited by mini-mad - 04 October 2017 at 8:51pm |
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If it sounds like a gorilla is trying to escape, turn it down.
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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But you wouldn't likely gain much from it. If you were to do this to the hogs you would effectively be adding fillets in corners reducing volume and surface area as the hog uses almost all of its volume already so you likely just be raising the the lower roll off response and improving response above its intended frequency range.
Edited by SouthwestCNC - 04 October 2017 at 9:09pm |
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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The point I was making was you can choose the EXACT path you wanted.
Yes you could extend the lower cut off or upper cut off but he was asking what he could improve with the arsenal of tools at his disposal... I WAS trying to be helpful by say there's a lot he could improve, he just needs to pick what he wants to improve. ...i seem to be the only one suggesting any ideas as a pose to shooting other people down. ......sorry got a bit "ranty" there. |
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If it sounds like a gorilla is trying to escape, turn it down.
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Different Scoops, with different drivers, exhibit different characteristics.. There is no such thing as "common", when it comes to Scoops. I've simmed, and tested many Scoops with many drivers, over quite a few years. Wadding, amplifier, speaker cable, processing all change cab/driver combo performance. As regards to 70-90hz dip, I often notch down 60hz, 90-100, as I prefer smoother sound.. If cab is not wadded.. |
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Global Depopulation - Alive and Killing.
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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Apologies i didnt mean to come across as shouting the man down. It think i confined myself to thinking he wanted to keep the volume of the hog the same. he didn't actually specify that so did jump to conclusions a bit, apologies for that. I should have said you could smooth the path but you would need to increase the overall volume to maintain the same horn path volume.
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