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My new Scoop design |
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mykey
Old Croc
Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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Topic: My new Scoop designPosted: 22 February 2006 at 12:22am |
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Joe Grime
Young Croc
Joined: 28 February 2004 Location: E London Status: Offline Points: 850 |
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Posted: 22 February 2006 at 4:18am |
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It will never catch on Steve |
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ceharden
The 10,000 Points Club
Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11851 |
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Posted: 22 February 2006 at 7:04am |
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Just needs to be trapezoid as well to eliminate any parallel walls and you'll have a practically unbuildable cab!
I can see what you're trying to do but since scoops have issues going up in frequency, making it all nice and smooth is probably unnecessary. Nice idea tho. |
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bartsegers
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Joined: 08 January 2005 Location: Netherlands Status: Offline Points: 25 |
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Posted: 22 February 2006 at 12:19pm |
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why retry an already desigend cab? in my eyes scoops are completely dead-designed |
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Matthias
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Joined: 22 July 2005 Location: Sweden Status: Offline Points: 206 |
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Posted: 22 February 2006 at 2:43pm |
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hey mykey, thats what i thought of, too. the round corners only can make the sound better, but i dont know if the triangle section is needed. bracing is important too. im not an expert, but the difficult way of rogs design isnt for fun i think. so i will read this topic carefully |
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freddyi
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Joined: 22 September 2004 Status: Offline Points: 936 |
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Posted: 22 February 2006 at 2:46pm |
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shouldn't lowpass function be "better" than attempting wideband rear
wave augmentation? - just curious - what would the smooth curve do to
summed response?
btw - here's Bill Woods' mini scoop vs JBL C40 http://gallery.audioasylum.com/cgi/gi.mpl?u=21168&f=UPWA RD.gif Edited by freddyi - 22 February 2006 at 2:53pm |
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Jay Lawless
Old Croc
Joined: 22 August 2005 Location: United States Status: Offline Points: 1702 |
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Posted: 22 February 2006 at 2:54pm |
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last i heard a smooth curve would give more of smooth roll off on the
bass end making it a nice pleasent sound. while straighter angel gives
a hard kick. but thats dealing with the horn mouth. the curve is great
when trying to get precise sounds, but i personaly go for the straight,
gota love the kick.
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Previously known as NeverWinter
Background: Automotive, Live and Home Custom Design. mid/high level based design and feild experience. Bass specialist |
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minaximal
Old Croc
Joined: 26 September 2004 Location: United Kingdom Status: Offline Points: 1784 |
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Posted: 22 February 2006 at 3:36pm |
straight angles act as a band pass, smooth curves will lessen this affect. straight sections are conical approximations of ideal flare rate and thus will have a more peaky non linear response. much as i love curves i would think, it may create even more cancellations than a normal scoop around 80-100hz as freddyi pointed. @mykey whats your goal, done any tests yet? is this a new xxl offering? |
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mykey
Old Croc
Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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Posted: 23 February 2006 at 2:58am |
who has? can i see any pic's? thanks for your comment's guy's most appreciated the cab is pretty easy to build actualy.. all the curves are mostly one piece and are made on pneumatic jig's and i use a 30 second 2 part glue @mykey whats your goal, done any tests yet? is this a new xxl offering?
Testing them next week up against my old design, ill let you know guy's Thank's again Edited by mykey - 23 February 2006 at 3:28am |
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bartsegers
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Joined: 08 January 2005 Location: Netherlands Status: Offline Points: 25 |
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Posted: 23 February 2006 at 11:27am |
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improvement is the idee. I thought you were re-inventing a scoop. no comments then.
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Phil B
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Joined: 21 November 2004 Location: Melbourne Status: Online Points: 2353 |
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Posted: 23 February 2006 at 2:35pm |
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Well....if you made it trapezoid it`d be petty close to these...
CMC Matrix scoops Which were designed and built by NCA. They use the " no hard corners " philosophy on all their bins and the scoops were no exception. All smooth curves and constant flare rates ...blah blah...loaded pd1850`s ..etc etc Anyway CMC sold `em on ....seen some of them about at carnival last year. Looks like the driver is right up to the rear chamber divide..? So a smaller rear chamb` and longer horn length..? Should be " smoother " than most scoops anyway! .p. |
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Joe Jones
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Joined: 08 June 2005 Location: United States Status: Offline Points: 63 |
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Posted: 25 February 2006 at 10:14am |
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Curves look pretty but below 200 Hz they really don't do anything. Scoops are a dead issue in any event. The dispersion of the large woofer limits its usefulness to perhaps 400 Hz, and the rear horn is too short to go below 60 hz or so. That's far too narrow a bandwith to justify such a large box, especially in the bass. Something this size shouldn't need to be paired with a sub.
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