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scoop

Printed From: Speakerplans.com
Category: Plans
Forum Name: Scoops
Forum Description: One scoop or two ;-)
URL: https://forum.speakerplans.com/forum_posts.asp?TID=106826
Printed Date: 01 July 2022 at 2:02am
Software Version: Web Wiz Forums 12.05 - http://www.webwizforums.com


Topic: scoop
Posted By: medi.root
Subject: scoop
Date Posted: 31 January 2022 at 6:46pm
searching for tha polar bear scoop plann  thanks in advance



Replies:
Posted By: BigSoundNorthWest
Date Posted: 06 February 2022 at 11:58am
Fairly sure keV from Dub Smugglers saying he created them. 
Good luck with that.

You'd be better off asking him to build you some, or ask Joe at PCH to make u some



Posted By: turbo7
Date Posted: 06 February 2022 at 12:37pm
i did once build one polar bear for comparison, it has a long horn but for drivers xmax greater than 10mm the throat is too small and it will suffer from turbulent airflow. 


Posted By: jammin75
Date Posted: 06 February 2022 at 2:09pm
https://forum.speakerplans.com/polar-bear-scoop-build_topic40313.html" rel="nofollow - https://forum.speakerplans.com/polar-bear-scoop-build_topic40313.html

Smile



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feel the vibes !!!   "Who Feels it Knows it"            Strong like Lion              


Posted By: bob4
Date Posted: 10 February 2022 at 3:39pm
Originally posted by BigSoundNorthWest BigSoundNorthWest wrote:

Fairly sure keV from Dub Smugglers saying he created them. 
Good luck with that.

You'd be better off asking him to build you some, or ask Joe at PCH to make u some


Wrong.

Refer to the original polar bear thread linked by "jammin45" to find out who the creator really is Wink


Posted By: toastyghost
Date Posted: 10 February 2022 at 3:58pm
Originally posted by turbo7 turbo7 wrote:

i did once build one polar bear for comparison, it has a long horn but for drivers xmax greater than 10mm the throat is too small and it will suffer from turbulent airflow. 


That’s not quite how a horn throat works, at least in theory. It’s not a vent, and the acoustic impedances of the rear chamber and first horn section either side of the throat opening will be much closer than a port meeting free air.

The increased compression may push the air into nonlinear behaviour when driven at full chat, but thats more because the pressure at that point might exceed 150 dB as it can in many high power horns, even those for HF.

Doing a proper analysis of the Polar Bear has been on my personal project to-do list for a while, but at first glance, a large portion of its clean, flat and powerful sound appears to be due to the fact it's been designed as a good transmission line as well as an efficient horn.

Rear loaded horns aka scoops have an even smaller mouth than a FLH of the same dimensions, so the acoustic behaviour typically transitions from horn to quarter wave resonant pipe at the low corner.

pfly is the designer and original builder, but I believe both Kev Smuggler and Matt at studio45 in Sheffield are licensed to build them. The plan isn't for general sharing otherwise, as far as I know.


Posted By: levyte357-
Date Posted: 10 February 2022 at 4:55pm
Originally posted by jammin75 jammin75 wrote:

https://forum.speakerplans.com/polar-bear-scoop-build_topic40313.html" rel="nofollow - https://forum.speakerplans.com/polar-bear-scoop-build_topic40313.html


Pfly, that's him..


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Global Depopulation - Alive and Killing.


Posted By: BigSoundNorthWest
Date Posted: 31 March 2022 at 8:26am
My mistake guys, 
Knew Kev Smugglrr had something to do with em



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