Interesting OB's found during e-Bay search

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
2

2litre

Member
Joined 2005
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-BE...ryZ14994QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

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
 
F

fred76

Member
Joined 2005
The same technology was licensed to Yamaha for their organ speakers.

Notice the 'ear' shape:

yamspkr201.jpg
yamspkr202.jpg

yamspkr203.jpg


fred
 
TerryO

TerryO

Member
Joined 2002
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,
TerryO
 
Variac

Variac

diyAudio Editor
Joined 2001
BurningAmp.org
Paid Member
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..
 
C

chrisb

Member
Joined 2002
Nelson Pass said:
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.
Click to expand...



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 :bigeyes: (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.
 
N

no xo

Member
Joined 2006
I remember Sony marketed some flat square drivers in the late 70`s early 80`s. And if I remember correctly the woofer cones were flat diaphrams with a honeycomb type filler for rigidity and used 4 voice coils per woofer. Never actually saw or heard a pair, but thought it was an "interesting" approach, but they weren`t on the market very long.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom