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Scoop calculation?

Printed From: Speakerplans.com
Category: Plans
Forum Name: Other plans
Forum Description: Discussion / Questions about all the other plans
URL: https://forum.speakerplans.com/forum_posts.asp?TID=2961
Printed Date: 27 March 2026 at 11:09am
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Topic: Scoop calculation?
Posted By: Ray666
Subject: Scoop calculation?
Date Posted: 30 October 2005 at 3:49am
Hy everyone- i think i have an idea to use a double scoop with two elements in one box , but i don`t know how to calculate the scoops can anyone help me with the problem? and i`m not quite sure what drivers should i use- can anyone ecsplayne the secrets of Scoops



Replies:
Posted By: Tom Umney
Date Posted: 30 October 2005 at 9:56am

http://members.aol.com/xxbase80a/doppelrutsche.2.15/bau.html - http://members.aol.com/xxbase80a/doppelrutsche.2.15/bau.html

JBL 4520 double 15 inch scoop design.

 



Posted By: Tom Umney
Date Posted: 30 October 2005 at 9:58am
Also I just added the double 15 inch scoop design I just scanned in, text is a little hard to read but I got a pretty crappy scanner.


Posted By: Tom Umney
Date Posted: 03 November 2005 at 9:51am
No thx for this. Why do I bother sometimes.


Posted By: ceharden
Date Posted: 03 November 2005 at 11:16am
@Toxic: Maybe if you answered the question rather than just posting plans???

@Ray666: Treat the double scoop as if it were two singles stuck together just missing the panels inbetween.

A scoop bin is a rear loaded horn the output of which consists of the sum of the direct radiating cone and the horn.  The horn predominates at low frequencies (up to 80-100Hz I think, not a scoop expert) and the direct sound from the cone above that.  The disadvantage with them is that there will always be points at which the horn and direct sound will cancel out.

To design/simulate consider them as a horn without a rear chamber and ignore the direct sound.

Have you looked at the super-scoops plans on this site and Rogs section in the FAQ about them?


Posted By: Tom Umney
Date Posted: 04 November 2005 at 12:14pm

@ceharden: I thought it was an easier way for him to make scoops from plans instead of trying of him trying to calculate the scoops and make his own version of double 15 inch scoop.

Fane 15XB works well in scoops and so does JBL 2226, and also Eminence Omega Pro 15. Theres some drivers that can be used in the plans above.

Or the Eminence models the Eminence scoop suggests, I can find the equivalent to what those old models are.

http://kytary.muzikant.cz/doplnky/eminence.htm - http://kytary.muzikant.cz/doplnky/eminence.htm

ME 15/300 = kappa 15,ME 15/300LF = Kappa 15LF,

 



Posted By: Ray666
Date Posted: 09 November 2005 at 12:00pm
@Ceharden : Thanks for the tip ceharden. but what programs should i use to simulate the box? all what i can say about the box is that its going to be like kv2 with two scoops , but not with the kv2 closed front. -think about it and imagine the picture.... mighty.... ain`t it

@toxic :your plan is allready well-known for everybody and it didnīt helped me at all im planing something much more different  , but thanks anyway for your time.


Posted By: LunchieTey
Date Posted: 10 November 2005 at 4:58am
I thought the KV2 system used 3 chamber bandpass bass enclosures...?

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Speaker addict


Posted By: Ray666
Date Posted: 13 November 2005 at 11:55am
i trie to think of a way to make the two chambers to  two scoops :) and i think im pretty close to it i think (and hope) :)


Posted By: LunchieTey
Date Posted: 14 November 2005 at 1:29am
Well it's gonna have to be a whole lot bigger to be horn loaded.

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Speaker addict


Posted By: tb_mike
Date Posted: 19 November 2005 at 8:56pm

Originally posted by LunchieTey LunchieTey wrote:

Well it's gonna have to be a whole lot bigger to be horn loaded.

For a slightly shorter horn,and 3dB more power handling,it isnt worth it IMAO.I think youd agree!

Mike.e




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