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 SEE-THROUGH HORN SPEAKER:/ Development Inside
Story |
Story 01: Unknown Horn
Sound
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Hasehiro had received
requests mainly from young
adults for it very often at
the Audio Fair.
That's a smaller speaker for PC than MM-S
type.
(Minimum MM-S type is MM-141S, and the size is
W16
x H45 x D25cm.)
But commercial PC speakers are
quite inexpensive.
So, Hasehiro hesitated to
produce the smaller back
loaded horn
speaker experimentally.
Will it play low-tone range
even a short horn...?
Hasehiro designed it as about
two-thirds the size
of MM-S type. (That is W12 x H35 x
D19cm.)
Such size can put it on the table and it
doesn't
provide a sense of incongruity if put it aside
of PC. |
MM-141S |
Story 02: Completion of
MM-131SS
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Hasehiro completed
their first desktop speaker MM-131SS and he
mounted
DIY Audio SA/F80AMG on MM-131SS.
Hasehiro inserted CD into
the CD drive of PC, and he drived it by
own small digital
amplifier immediately.
First, he listened to
bossa nova by Jacintha.
Floaty her voice, wind of saxophone
blowing through the space and
brilliant piano;
MM-131SS is open and realistic sound quality in her
own
right.
Hasehiro changed the speaker driver to other 8cm
drivers, but it
became languid sound from lack of low-tone
range.
It seemed MM-131SS has good chemistry with DIY Audio
SA/F80AMG.
Anyone can enjoy dynamic 8 beat
bass if the drivers are DIY Audio
SA/F80AMG,
and that is magna-guard video shielding
design. |
LS:
MM-151S
RS: MM-131SS (prototype) |
MM-131SS is a reasonable
feeling of the massiveness of sound and the low-tone range
compared with MM-151S.
But maybe that's just as well if the
owner listen to music
while operate a PC.
Above all,
MM-131SS has a
beautiful sound.
Hasehiro got into the
sound.
He always heard the song
called "Ashita" by Ayaka
Hirahara when he operate
a PC. |
This song is so dolce music of an unhurried
singing voice with clear-cut sweet notes of a
harp.
MM-131SS played realistic about the vibration of
tight harp strings.
Visitors said "Is the
sound from a PC?!"
It was hollow
note like harped with gloved fingers when they hear this song
through closed-box small speakers with the same
SA/F80AMG.
Hasehiro's first desktop speaker MM-131SS was
completed. |
Story 03: Unique Idea
Again
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Hasehiro understood to enjoy even smaller
backloaded horn speaker as home audio.
The undertone was
deeper than Hasehiro thought, and the appeal of MM-131SS is
its sense of speed and its breeziness.
Hasehiro
came up with a unique idea one has cherished for many years
once again. |
Story 04: Trial and
Error
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Hasehiro completed see-through
backloaded horn
speaker.
Anyone can enjoy the exponential curve,
too.
The side baffle boards are clear
acrylic board 10mm
thick, and
Hasehiro bonded with a
transparent
bond.
Hasehiro had this idea since olden days,
but acrylic board is costly so he couldn't use it to their
previous big speakers.
Hasehiro had a tricky
issue.
That's glimmering transparent
bond scars.
They
glimmer like luminous paint
if looked at from different
angles
by refraction of light.
(See the
right photo.) |
glimmering transparent bond
scars. |
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Hasehiro looked for the dissoluble bond
through professional company,
but he couldn't find
it.
He tried a transparent double-stick tape.
But it
also glimmers and lack of adhesion strength.
What
a pity!
It's too roughly made if he bolt the side baffle
boards up.
Because the side baffle boards are clear
see-through boards.
Gilded bolts and nuts are
stylish...?
Lack something... |
Hasehiro
found the amazing thing in a storehouse of a
screw
wholesaler, and he decided to make the second
prototype once again.
by a different color...
based on the color of
iPod... |
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