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Old 19th March 2013, 12:36 PM   #291
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Default Bowls

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Old 19th March 2013, 12:37 PM   #292
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Default 6.5

Pick
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Old 19th March 2013, 12:38 PM   #293
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Default Sorry forgot to manage my attachments

6.5 pick
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Old 19th April 2013, 01:55 AM   #294
OllBoll is offline OllBoll  Sweden
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Progress!

The extra bits are mounts for my tweeters which will be in a ring around the midrange. Current plan is to cover the whole inside and outside with wool carpet... but might be overkill so perhaps I'll settle for covering only backs of the tweeters on the outside and around the edge of the midrange.
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Old 19th April 2013, 05:02 PM   #295
badman is offline badman  United States
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A double isobaric push push, and my spherical CSS FR125 "Galacticons", made from aluminum "Galaxis Space Scanner" housings from lockheed.

On distortion cancellation- I definitely find it to be massively valuable in subs. John K at music and design did a study on isobaric vs push pull and found that isobaric was severely limited for distortion cancellation based upon the additional compliance between woofers, so clamshells must be made with this volume minimized (or some coupling between cones, I've thought a carefully designed cardboard tube and permanent mountings of the clamshell assembly would work very well here.

I made my clamshells with 1/4" between frames, instead of a normal .75" baffle to minimize the compliance volume.

Isobaric
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Old 1st June 2013, 06:04 AM   #296
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Fantastic. Original thinking!
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Old 6th June 2013, 06:33 AM   #297
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Has someone commercialised them?

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Kugel 871C - Lautsprechershop von blue planet acoustic
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Old 6th June 2013, 10:59 AM   #298
vrun is offline vrun  Germany
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not really...
BPA or Blue Planet Acoustics is the Distributor of Tang Band speakers.

BPA has a "kit distribution" branch called "OAudio"
Here oadudio is selling their: "Tang Band W3-871OEM chassis"
for a speaker developed by a German Speaker Mag called HOBBY HiFi
HOBBY HiFi 4/2008 is actually older than this thread
The "oa"-Kit consists of 2 Parts:
(1) Their W3-871OEM
_and_
2 "half" bowls "Blanda Matt available at IKEA"

go figure...
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Old 7th July 2013, 02:02 PM   #299
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Guys,

What about combining Ikea's 28cm bowl with 28 lamp cover (of course damped from inside say by bitumen pads used in car installations) which together will form smth very similar to midrande enclosure of B&W Diamonds 801/802. This enclosure can be sealed ported or aperiodic - depending what works better.

Someone tried it? I'm probably going to, as much as I love my open baffles - having to maintain >1m from the back wall doesnt really work for my living room, and placing OBs closer causes smeared imaging and details.

Any thoughts and suggestions on the subject welcome!
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Old 7th July 2013, 02:57 PM   #300
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this is a link to lamp:
MELODI Pendant lamp - IKEA
can be also extended into a tapering tube..
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