Ribbon Tweeter Wave Guide removal? - diyAudio
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Old 4th April 2012, 04:42 PM   #1
deanxxx is offline deanxxx  United Kingdom
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Join Date: Mar 2012
Location: brum
Default Ribbon Tweeter Wave Guide removal?


I have some Beston Ribbon Tweeters that I'm going to use in an Open Baffle design. I just wondered if I should keep the plastic wave guide in place or remove it? What would be the effect on the sound and output? I guess it will narrow the dispersion somewhat but would it improve it in other ways?

This is the driver:

This is the project I'm building:
Ribbon OB TL Hybrid w/o XOs ;-)

Thanx in advance for your help,
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Old 15th December 2013, 07:48 PM   #2
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Join Date: Jul 2011
I have some FR and distortion grafts here: http://http://http://techtalk.parts-...ghlight=RT002a
Hope it helps.
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Old 9th June 2014, 08:03 AM   #3
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Reposting link: Beston RT002A Dipolar
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Old 11th June 2014, 10:09 AM   #4
DF96 is offline DF96  England
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Join Date: May 2007
When you say 'waveguide' do you mean horn? If so, that is probably an important part of the tweeter design - it provides acoustic impedance matching between the ribbon and the air in the room.
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Old 11th June 2014, 10:58 AM   #5
AndrewT is online now AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
A horn can increase the moving element efficiency from lows of around 0.1% to 2% to anywhere in the range 5% to 50%.

That efficiency increase comes from the acoustic loading being very much larger than the element's electrical resistance.

A ribbon is typically very low electrical resistance.
Without the "horn" the ribbon is likely to be overloaded. Especially if one were to turn up the volume to bring back the missing treble.
regards Andrew T.
Sent from my desktop computer using a keyboard
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