The logic behind the Focal Diablo Utopia's SLANTED SPEAKER DESIGN?compared to flat... - Page 2 - diyAudio
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Old 17th December 2012, 06:47 PM   #11
badman is offline badman  United States
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It's supposedly to "time align" them... of course, we're talking about VERY minor adjustments in a loudspeaker sense, so it's really just a gimmick. An inch forward or back could be somewhat meaningful I suppose. This doesn't really have that range of adjustment.
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Old 17th December 2012, 06:55 PM   #12
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Depends entirely upon the purchase of the optional headclamps.

Get the titanium ones, if you have the option...



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Old 17th December 2012, 07:44 PM   #13
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Quote:
Originally Posted by aarvin2 View Post
What is the logic behind the Flat tweeter and Slanted woofer design ??
Steen Duelund: "All units must be in phase at all frequenzies"

This is ensured by:
- phase-coherent x-over (the "syncronig filter") (for this to work as intended, all units must be impedance corrected to DC-resistance)

- aligning the units´ acoustical centers to perform a circel from the listening point:

Click the image to open in full size.

(also check speakers from Gryphon, Wilson, Pass, earlier B&O, B&W and several others)

Last edited by Finnogangela; 17th December 2012 at 07:56 PM.
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Old 17th December 2012, 07:52 PM   #14
system7 is offline system7  United Kingdom
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It's time alignment of the drivers. A very common feature in technically advanced loudspeakers. The idea is to get a nicer integrated result with simpler filters.

No surprise that people liked the B&W DM2A floormounting speaker:

Click the image to open in full size.

Or the more recent Sonics Anima by Joachim Gerhard:

Click the image to open in full size.

I'm sure it IS futile here to give a technical analysis, but I like doing this sort of thing:

Click the image to open in full size.

Quite how you reconcile that with the characteristic notch of inverted polarity on the tweeter or the order of the filter, I leave to the Interested Student.

Click the image to open in full size.
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Old 17th December 2012, 07:54 PM   #15
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Quote:
Originally Posted by Finnogangela View Post
Steen Duelund: "All units must be in phase at all frequenzies"
Which as long as the drivers are not physically coincident can only happen in one listening position.

dave
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Old 17th December 2012, 08:44 PM   #16
system7 is offline system7  United Kingdom
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Quote:
Originally Posted by planet10 View Post
Which as long as the drivers are not physically coincident can only happen in one listening position.

dave
Oh, aren't you clever to figure that out! Special subject for Planet 10 on Mastermind tonight, THE BLEEDING OBVIOUS!

BUT, you could do a time aligned D'Appolito...

Click the image to open in full size.

6moons audio reviews: Gryphon Audio Designs Mojo

Very nice, IMO.
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Old 17th December 2012, 08:57 PM   #17
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I have a more concise way to explain what it does: change the polar response.
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Old 17th December 2012, 09:14 PM   #18
system7 is offline system7  United Kingdom
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Quote:
Originally Posted by dumptruck View Post
I have a more concise way to explain what it does: change the polar response.
Yes, NOD'S as good as a wink to a blind horse an all that.

I was VERY IMPRESSED when Michelino at this forum produced his box design:

Click the image to open in full size.

B200 Kef Drivers

This kid's got a future.
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Old 17th December 2012, 09:18 PM   #19
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Quote:
Originally Posted by system7 View Post
THE BLEEDING OBVIOUS!
To you and me and many others, but not all.

Quote:
BUT, you could do a time aligned D'Appolito...
Driver C-C needs to be 1/4 wavelength or less at XO to be acoustically coincedent.

dave
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Old 18th December 2012, 12:41 AM   #20
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Not too good Steve. Why not keep it constructive? We have others maintaining the disparagement protocol. JMO of course
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