[JN] WE bi-flex article

John Day daysabroad at gmail.com
Sun Apr 21 16:36:18 CDT 2019


Yay, finally something similar to Diatone!

:-)

https://jimsaudio.com/l-cao-fa6-alnico-matched-full-range-speaker-6-inches-pair/


On Sun, Apr 21, 2019 at 7:38 AM Hans Hedal via Sound <sound at soundlist.org>
wrote:

> Den 11-04-2019 kl. 13:54 skrev John Day via Sound:
>
> On 4/10/19 6:30 AM, peter sikking via Sound wrote:
>> >hey Joes,
>> >
>> >the retro vintage modern hi-fi blog has a WE publication
>> >article up today that is right up our alley:
>> >
>> ><
>> http://www.itishifi.com/2019/04/western-electric-oscillator-1947-what.html
>> >
>> >
>> >enjoy,
>> >
>> >
>> >     --ps
>>
>>
> I wonder what modern speakers were influenced by that article, and to what
> degree, with what trade-offs.
> I think this one was influenced, and Joe immediately spotted the
> similarity when I used it in a 2-way back-loaded horn, but the trade-off is
> that big peak at 1500 Hz. You really can't use it. Without that it has a
> good gutsy sound.
>
> https://www.parts-express.com/pedocs/specs/290-404--eminence-beta-8a-spec-sheet.pdf
>
>
> https://www.parts-express.com/eminence-beta-8a-8-midrange-pa-driver--290-404?utm_source=google&utm_medium=cpc&utm_campaign=pla&gclid=CjwKCAjwy7vlBRACEiwAZvdx9tHiT9xFN6r_sFJ7lwHK9NhyBDEFYOKeAF0YhdQjbQy5HQVRkszi-BoCIK4QAvD_BwE
> [image: image.png]
>
> For those who forgot the WE bi-flex thread some days ago. Ian just gave an
> additional example to John's question, about which modern speakers were
> influenced by this series of WE loudspeakers:
> "On list is a pair of L Cao full range speaker. The motor is composed of
> expensive and good sounding alnico magnets. The paper cone is hand-made.
> The paper cone profile is designed with reference to the legendary Diatone
> PM610. This cone profile was designed under an extensive research by NHK of
> Japan way back in 1950's as an effort to make a  single cone full range
> speaker without the normal cone breakup problem of conventional wide range
> drivers. The result is a no-whizzer design with exceptional frequency
> response, wide dispersion and low-distortion performance, in par with the
> cone profile of Western Electric's WE755a."
>
> I have no ready-made answers to what degree, and what compromises were
> made.
>
> Hans
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