Ekta/9700
- built by Kouichiro Sugano/Japan
Dear
Troels.
My ekta project was completed. My wife and daughters says
"Great sound !".
Ekta is my treasure. Thank you for the crossover
simulation with ss9700.
Some pictures are on the web for you.
http://www.mars.dti.ne.jp/%7Ek-sugano/project-ekta.html
best regards,
Kouichiro Sugano, JAPAN.
Thanks,
Sugano, for your report and excellent pictures. The work
you have done on the Baltic birch is impressive.
I wonder what the (paper ?) triangles behind the bass
driver are....
best regards, Troels
The
paper triangles behind the bass driver are
"Tozawa-Resonator". It is named after
Dr.Tozawa.
Tozawa-Resonator is very famous in japanese DIYer.
Acoustic materials such as the felt, the glass wool, and
cotton are
porous acoustic material. A lot of spaces and minute
holes are formed in the layer,
the energy of the sound is converted to thermal energy.
However, it is difficult to absorb the bass of 300Hz or
less in
speaker box in this method. On the other hand, Resonator
of absorbing sound (shut paper box or paper balloon) is
especially
effective to 2KHz or less. The sound is converted into
the vibration of paper.
How to make Tozawa-Resonator:
#1)Make triangular or hexahedron box by soft paper.
"Washi" paper is the best material.
#2)Put soft cotton wool in it.
#3)Seal it with the paste.
#4)Hung Resonator with the string in the speaker box or
paste Resonator in the speaker box.
"Tozawa-Resonator" is shown on many japanese
web.
http://www.spnet.ne.jp/~hasehiro/product/rezomini.html
http://dp00000116.shop-pro.jp/?pid=8734
http://www9.plala.or.jp/ken-salt/audio/ssc_mm141s.html
http://www.geocities.co.jp/Technopolis/5053/sp/tips01.htm
http://devipoke.blog4.fc2.com/blog-entry-274.html
http://devipoke.blog4.fc2.com/blog-entry-244.html
- and more on google japan.
http://www.google.co.jp
regards,
Kouichiro Sugano, JAPAN.
Thanks
for the explanation and the links! I need to improve my
Japanese :-)
br
Troels
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