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In Reply to: RE: A Cool video of Joe Roberts. posted by tomservo on July 02, 2012 at 11:01:01
It's a clever bending wave design isn't it?
I'd love to try a Manger in a sphere though. (Insufficient funds make it unlikely). Not efficient and it would need Eq of its BDS shelf plus separate bass support - probably actively driven to get low enough. reckon.
With the right size sphere, the bass bin could start at the BDS -3db point and still not blur bass voice sources.
I'm not at all taken with the grille-diffusor idea, either.
Note that a post in response is preferred.
Warmest
Timothy Bailey
The Skyptical Mensurer and Audio Scrounger
And gladly would he learn and gladly teach - Chaucer. ;-)!
'Still not saluting.'
Follow Ups:
And Huh? again.
Note that a post in response is preferred.
Warmest
Timothy Bailey
The Skyptical Mensurer and Audio Scrounger
And gladly would he learn and gladly teach - Chaucer. ;-)!
'Still not saluting.'
The whole idea of this speaker was to create a sound such that, if while it was playing nerds started talking about diffraction and stuff, somebody would yell out "Shhhh, were trying to listen to music over here!!"
RE: BDS, you realize that we wanted to shelve off the HF, right? There is no HF baffle.
Three was so much going on at that transition point to "outside the design spec" pistonic backhorn radiation that baffle step was not on the table for discussion.
Some designs are in the realm of empirical experimentation not calculation, and this was one of them.
There is no way to understand what this creation sounds like unless you've heard it. You really can't get there via photos and logic.
“It's a clever bending wave design isn't it?”
It is cool! What it reminded me of was a Quad esl63 which if one only thinks of the surface, produces a segment of a spherical wave front also. Where the quad drives concentric rings of ESS elements driven sequentially with electronic delay, the manger does it with a wave progressing outwards physically.
While it was superb in “time” having one location over a wide frequency range and so could reproduce a complex wave shape like a square wave or musical signal, it also had a rapidly increasing distortion as the frequency fell. If I remember at 90dB at 1 meter, it had 5% THD @ 200Hz.
On the other hand, as part of a two way system it could be very good.
I would leave off the heating duct diffuser / fan blades, you have something that radiates nearly perfectly to begin with, put it naked on a large flat baffle I say haha .
Best,
Tom
Tried to find a pic of Dr,Manger's diffuser and was unsucessful, but I did find this.
A real estate company named Diffusion had a "manger" set-up in a Nativity display to boost holiday rentals!
http://www.prweek.com/uk/features/1127515/Digital-Nativity-theme-boosts-room-rental-site/
I'd bet that hay is good for room treatment...
:-)!
Now I'm a a nerd, for knowing that waveforms matter - to music.
No folks it's got to be 'exciting' and JR approved.
Note that a post in response is preferred.
Warmest
Timothy Bailey
The Skyptical Mensurer and Audio Scrounger
And gladly would he learn and gladly teach - Chaucer. ;-)!
'Still not saluting.'
Huh?
I have built designs with Mangers I enjoyed the sound but I prefer compression drivers.
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