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Elac Jet Dispersion Control
Old 17th October 2013
  #1
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DirkP's Avatar
 

Elac Jet Dispersion Control

What do you experts think. Does it make sense?
Here's the description on Elac's webpage:
"The JET DC is best suited for rooms with little sound absorption at high frequencies, especially for rooms with large windows without curtains or with a smooth floor without a carpet."
(ELAC – Klang lebt – JET Dispersion Control (JET DC))

Elac is held in high regard here in Germany, they are building their own AMT-tweeters (like Adam). And the speaker-units for "The Rock" are made by Elac.
THE ROCK | Unity Audio |

Here are pictures of the Jet-tweeter without and with the dispersion control:



Tweeter with Jet-Dispersion Control:


I don't expect miracles, but do you think it's more a voodoo-thing or it can at least improve the situation in rooms with little sound absorption?

Dirk
Old 21st October 2013
  #2
Gear Guru
 
Ethan Winer's Avatar
 

Lightbulb

Quote:
Originally Posted by DirkP View Post
do you think it's more a voodoo-thing or it can at least improve the situation in rooms with little sound absorption?
I've never seen or heard this in person, so I can offer only a few general comments:

1) I would never second guess a speaker designer by adding a contraption on top of what they decided was the correct design.

2) Speaker dispersion as relates to side-wall reflections is simple to improve the proper way by adding absorption at those places on the side walls.

So if it were me, I'd treat the walls, which is known to be effective, rather than screw around with some add-on do-hickey.

--Ethan

The Acoustic Treatment Experts
Old 21st October 2013
  #3
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Glenn Kuras's Avatar
Quote:
1) I would never second guess a speaker designer by adding a contraption on top of what they decided was the correct design.
Unless tissue paper over NS-10 tweeters!
Old 22nd October 2013
  #4
Gear Guru
 
Ethan Winer's Avatar
 

Lightbulb

Tissue paper on an NS10 tweeter is also harmful. I saw an article with graphs years ago showing the comb filtering that adds, as sound waves at the highest frequencies bounce back and forth between the tweeter cone and the back side of the paper.

--Ethan
Old 22nd October 2013
  #5
Gear Guru
 
Glenn Kuras's Avatar
Quote:
Originally Posted by Ethan Winer View Post
Tissue paper on an NS10 tweeter is also harmful. I saw an article with graphs years ago showing the comb filtering that adds, as sound waves at the highest frequencies bounce back and forth between the tweeter cone and the back side of the paper.

--Ethan
Lighten up Lucy, I was kidding. Note the
Old 22nd October 2013
  #6
Gear Maniac
 

Quote:
Lighten up Lucy, I was kidding

Hey..we don nee no stinkin kidding here..cause we're serious.











not.
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