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Old 11th August 2006, 05:57 PM   #1
2litre is offline 2litre  United States
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Default Interesting OB's found during e-Bay search

One of my favorite e-Bay stores had some flat panel speakers for sale and while doing a search for other flat panel speakers I found these.

http://cgi.ebay.com/TRIO-OF-RARE-BER...QQcmdZViewItem

I think they're 2ft x 2ft. Also in the article link is a picture of one with 2 drivers, one centered in the panel and another bolted in just off the floor.

I like the rails they're mounted on. Allows you to raise or lower the driver for the listening level of an audience.

Always looking at what others have tried.

R/

Jim
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Old 11th August 2006, 06:15 PM   #2
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Interesting. Not familiar with them myself, but it's always nice to see something a little different crop up.
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Old 11th August 2006, 06:46 PM   #3
fred76 is offline fred76  Philippines
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The same technology was licensed to Yamaha for their organ speakers.

Notice the 'ear' shape:

Click the image to open in full size.Click the image to open in full size.
Click the image to open in full size.

fred
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Old 11th August 2006, 08:16 PM   #4
2litre is offline 2litre  United States
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So they have a transducer that is coupled to the big panel?
Big radiating area.

Interesting to see little (big) things like this.

R/

Jim
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Old 11th August 2006, 08:27 PM   #5
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Yamaha also brought these to the hi-fi market in the 70's as
I recall. At the time, there was some snickering about the
"ear shape", but I believe Yamaha's intent was to distribute
resonant modes on the radiating surface.
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Old 11th August 2006, 08:33 PM   #6
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Is this the same (or similar) technology that NXT use?
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Old 11th August 2006, 08:41 PM   #7
infinia is offline infinia  United States
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Cool Styrofoam wonders, turn yer ice chest into a speaker cab.

I wouldn't mind playing with some of those, just to see what the T/S and EQ looks like.
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Old 11th August 2006, 08:51 PM   #8
TerryO is offline TerryO  United States
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The use of an asymetrical shape for the cone certainly serves to eliminate, or at least diminish, brake-up modes that can occur on the cone.
I've had some luck with the old Radio Schack 40-1297, which unlike it's distant cousin the 1197, is a fairly narrow oval shape.
It's a 4x10 driver with an Fs of "about" 110Hz or so and generally has a very nice sound. Other than the goofy shape, it would be an ideal midrange and I think it rolls of somewhere around 12-14kHz.
Now I guess I'll have to dig out a pair and get to work on something or other.

Best Regards,
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Old 11th August 2006, 09:08 PM   #9
Variac is offline Variac  United States
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They are not the same technology as NXT.
I think they are basically a voice coil attached to a pretty rigid piece of styrofoam with various ridges/valleys for resonance control

The particular ones on E-bay look like they were meant to be used in a suspended grid ceiling system for voice and background music. The 2'x2' size reinforces this opinion.

I heard some wall mounted "audiophile" versions at a store in Berkeley back in the day, and vaguely remember them as OK considering how flat they were, but nothing special..
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Old 11th August 2006, 10:23 PM   #10
chrisb is offline chrisb  Canada
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Quote:
Originally posted by Nelson Pass
Yamaha also brought these to the hi-fi market in the 70's as
I recall. At the time, there was some snickering about the
"ear shape", but I believe Yamaha's intent was to distribute
resonant modes on the radiating surface.


I had a chance to hear these when selling audio gear in the mid-late 70's, and while you'd never confuse them for NS1000M (one of the best loudspeakers ever from any mainstream corporate Japanese IMHO) - highly dynamic and detailed they were not, but on a whole there were other commercial products in the store (whose name ryhmes with rose) that sounded worse.

I can vaguely recall several other attempts at styrofoam flat panel speakers over the years, none of which were memorable (is that a contradiction?) - so it would be interesting to audition them with an open mind, and limited expectations - there's always the opportunity to be pleasantly surprised.
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