what kind of enclosure is Zu Omen ? - Page 2 - diyAudio
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Old 23rd April 2012, 07:51 PM   #11
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It is a form of quarter-wave, akin to an ML-TL. The impedance curve shows an additional 2 bumps where you would expect them to be.

dave
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Old 23rd April 2012, 10:01 PM   #12
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by zman01 View Post
Bigun,

Why not just take one apart! Or would that void the warranty?
I don't own any - but my friend, who just built a SV811 SET is looking for some off-the-shelf speakers and rather fancied a pair of Zu's. So I took a lot at their website and started getting a bit worried about their marketing speak.

Now it seems that they don't really have anything particularly 'new' here. Perhaps the magic is in their drivers.
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Old 23rd April 2012, 10:14 PM   #13
Zen Mod is offline Zen Mod  Serbia
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OEM-ed by Eminence
based on Speaker Detail | Eminence Speaker and Driver Detail | Eminence Speaker

except in house added PP to bass , dunno for other possible differences
ferofluid absent from APT (regular Eminence have it)

I think that Zu's magic is in package , not any particular component
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Old 23rd April 2012, 10:29 PM   #14
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I'm agreeing with the above answers. It's a slightly complex asymmetric BR port. An optimized Port would have a double flair like the pyramid in the pic but with another upside down sitting on top of it. The tuning is determined by the smallest section of the port and the length.

I've got some old white papers on port flairs that show this. I'll look for them.

revb.

edit: found it http://www.aes.org/tmpFiles/elib/20120423/11094.pdf

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Old 23rd April 2012, 10:57 PM   #15
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Upon further inspection of the drawing I see where they talk about back-wave rectification. I'm not sure how much it would help as the geometry is too simple to be effective over a large range of pulse widths but it's there none the less.

(I've designed exhausts' for a few bikes that ran the TT at the Isle of Man. They have really good Kippers in Peel if you like smoked fish.)

later,
revb

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Old 23rd April 2012, 11:05 PM   #16
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Originally Posted by revboden View Post
.......

(I've designed exhausts' for a few bikes that ran the TT at the Isle of Man. ..............)
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Old 23rd April 2012, 11:28 PM   #17
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LOL!!!!

They let me do a couple of laps after the races... Oh my God!!! at speed it's nuts. Testing the bike's in south Texas on hill-country roads was crazy enough for me.

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Old 23rd April 2012, 11:35 PM   #18
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File Type: gif Isle of Man.gif (4.3 KB, 205 views)
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Old 23rd April 2012, 11:58 PM   #19
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They let me do a couple of laps after the races... Oh my God!!! at speed it's nuts.
If I had a bucket list, that would be on it.

jeff
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Old 25th April 2012, 05:47 PM   #20
stevieg is offline stevieg  United Kingdom
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So does it "get on the meg(aphone)" at certain revs (frequencies), as my Dad (1939 Junior TT Bronze replica) would have said? Full marks for running the mid/woofer wide open, though.

Cheers Steve
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