|
Mr.N, Niigata City
July 2006 |
I mounted PIONEER car stereo speaker
TS-J1200A on MM-151S.
It had a more docile sound than
I had imagined.
It has a clear well-projected high note
because of 2-way speaker
and a real vocal.
TS-J1200A
car stereo speaker
It has a superiority over MM-151ST with
ALTEC CF404-8A
about the sound reproduction of simple
musical composition.
Every CD has different
recording,
the writer's point of view is different,
too.
I thought it's unreasonable to do all the work
alone
by having the second speakers with different
personalities.
I took a sponge of PIONEER
TS-J1200A.
TS-J1200A in the photo is that I tucked a piece
of
black cardboard supplied with ALTEC CF404-8A between
TS-J1200
and the baffle board of MM-151S.
MM-151S with PIONEER
TS-J1200A |
I chose
PIONEER TS-J1200 from among car stereo speakers because
I
wanted the coaxial 2-way speaker.
As a result, I feel good about
the choice.
MM-151S:
190(W)X450(H)X250(D)mm
|
Mr.Y, Kyoto City
June
2006 |
|
Last
December,
I bought SSC coated front baffle
boards for FOSTEX
FE108Eƒ°.
Thank you for leaving a pilot holes for
FE108Eƒ°
on the front baffle boards.
Despite this,
sorry I have never written sooner.
It is now 6 months since I bought
the
front baffle boards.
I painted MM-151
black
except the front baffle boards,
and I put a
black PVC
sheets
on
that.
Then I fixed the speaker nets to
FOSTEX
FE108Eƒ°.
The low pitch sound is
now more
understatement.
Because I mounted
the powerful
FOSTEX FE108Eƒ°
than the recommended drivers,
then
I fixed the canceling magnets
to FE108Eƒ°. |
MM-151 with
FOSTEX
FE108Eƒ° | The mid-high sound is now more
wonderful.
This is the most natural sound.
I
live in a multifamily building.
And that I favor controlled low pitch
sound,
but that's a robust
low pitch sound
with a characteristic back loaded
horn system.
FE108Eƒ°
My system is dynamic because all of my
audio instruments are
re-creations or my own devices, but
MM-151 with FE108Eƒ°
bring out the best in my system.
When I fine-tuned the amp,
MM-151 with FE108Eƒ° could describe
its distinction
perfectly.
Straightforward loudspeakers were completed, I
was satisfied
that the
aging are almost finished.
I retightened MM-151 beyond the period of
drying.
As a result, I was
surprised much more tight sound.
I'm having a great time from musics,
movies, TV programs and radio.
Enclosures: MM-151 with SSC coated
baffles
Drivers: FOSTEX FE108Eƒ° with canceling
magnets (souped-up by Ge3 ProjectQ)
Speaker
cables: Western Electric 16GA 2m | Power
amplifier: YAMAHA B-2 (re-creation)
Volume
controls: own attenuator by TKD type-CP
CDP:
DENON DCD-1600 (re-creation) | ASCDP: YAMAHA
DVD-S675 (re-creation)
Line cables: BELDEN 8412
and CANARE RCA | ACC: Corian boards and Ge3
keystones
MM-151:
190(W)X450(H)X410(D)mm
|
Mr.S, Tokyo
May
2006 |
I went to a speaker shop in Akihabara,
Tokyo.
I listened to the sound of its
anniversary-modeled
2-way rear bass reflex speaker. It was
a good sound.
The shop manager said,
"These speaker units are
available for back loaded horn system, too."
DLX-F177
car stereo speaker
They
are ALPINE separated 2-way speaker DLX-F177.
(17cm woofer,
3cm tweeter with a dedicated network)
I saw the 2-way back
loaded horn speaker using a woofer and
a tweeter in
Mr.Nagaoka's
book, and
purchased
DLX-F177 and MM-171, heartened
by the speaker
designed by him.
I painted MM-171 with two-pack urethane
paint,
including surfacer.
MM-171 with ALPINE
DLX-F177
| As for the light sound such as female
vocal music, guitar and clarinet,
MM-151S with ELCY
Electric LC-12S has a superiority over
MM-171 with ALPINE
DLX-F177.
But as for the heavy electric bass music like
hard rock,
MM-171 with DLX-F177 shows overwhelming
strength. |
| upside |
MM-151S with ELCY Electric
LC-12S |
| downside |
MM-171 with ALPINE
DLX-F177 |
MM-171:
250(W)X450(H)X410(D)mm
|
Mr.M, Hachioji City,
Tokyo
August 2005 |
|
M160RM
I bought
MM-171 and Mercury M160RM about a year ago.
I became quite
interested in the painting because MDF look cheap.
I wanted
to coat with SSC, but I gave
up the idea
because of lack of funds.
First, I
bonded all the parts except the front and the side baffle
boards
with a school glue,
and I polished its outside with sandpaper.
Next,
I painted all the parts including the inside
of the horn
with a sanding sealer.
(horns:
once, front baffles: twice, others:
thrice)
After that, I polished all the parts with
300-grit sandpaper.
I was thoroughly delighted with
the end result.
I chose a teak-colored urethane
varnish as
the top coat paint.
I brushed them with it, but my
choice was a slip-up.
It left a streaky surface
because I don't have the skill of
the brush painting. It
is MDF but woodtone.
At this point, I painted only
one MM-171, so one is finished
and the other is unpainted
MM-171. I compared both sounds.
Clearly, the volume from
finished MM-171 was much greater
than unpainted MM-171,
also the low-pitched tone.
Painting gave the sound a sense
of depth, too.
I utilized lessons from the past to the
other painting.
I brushed them while transmitting
pressure equally with carefully
when
I brushing.
It was a much better finish than last
time,
but it left a little streaky surface.
As a
result, clear lacquer seems
to bring a better result for the finish,
and also
blacking.
I was screwed shut the 4 corners of the
front baffle boards.
(I buried the implantable knurled
nuts within
the receiving end.)
So, the sealing performance more
improved by that.
I felt that the back loaded horn is
an instrument.
Next time, I want to buy SSC coated
MM-191T.
AMP: LUXMAN L-560
class-A integrated amplifier / CDP: DENON
DCD-SA100
MM-171:
250(W)X450(H)X410(D)mm
|
Mr.M, Kagoshima
Pref.
May 2005 |
Excerpt from His
Website
http://www.synapse.ne.jp/hirom/newMM-181.html
I
bought MM-151S and ALTEC CF204-8A in February 2004.
And I
must admit I got caught in ALTEC's spell.
I need a
little more bass...
So I bought extra sized MM-181 for
ALTEC CD408-8A in August 2004.
CD408-8A
I was
satisfied to have greater bass than MM-151S.
However,
it started up to me as like,
"If I mount the drivers from
the inside...?"
"If I reduce the capacity of the air
chambers...?"
I asked Hasehiro's opinion.
Hasehiro
says I already tried it before, and I felt the horn
effect
of the baffle board despite 2mm instead of as the
capacity
of the air chambers.
If I upheap
another board as the inner baffle board...?
I was therefore
I ordered custom-made 2 baffle boards each
with tapered
bore.
I received the custom-made 2 outer baffle
boards
and 2 inner baffle boards in February
2005.
Before
only one baffle board |
After
one baffle
with one inner
board |
I adhered the outer baffle board and the inner
baffle board strongly
with epoxy bonding
agent.
And
I filled a slight gap in the baffle aperture with
epoxy wood
putty.
The
sound rushes fiercely forward.
It seemed like they are
playing music at about 30cm short
from MM-181
before remodeling.
But now, it seems like they are
playing music at about 100cm short
from
MM-181.
MM-181 spacing is less than 150cm.
Before
adhesion, I listened to music at one baffle board
after
mounting from the inside.
2 baffle boards are better than 1
baffle board
about sound extrudability, but 1 baffle
board is better than
2 baffle boards about sound
extensity. < related owner
voice >
I'm
very happy with MM-181 and ALTEC CD408-8A.
And I am deeply
attached to them.
I am planning to remount ALTEC CF204-8A
from the inside of MM-151S.
Thank you for your
response to my selfish requests.
MM-181:
280(W)X450(H)X410(D)mm
|
Mr.N, Ibaraki
Pref.
March 2005 |
(He bought MM-161S and ALTEC
CF404-8A)
Report from Hasehiro
He
painted MM-161S including the inside of the horns
with
a transparent urethane
paint.
He
sent us them,
"Please compare the sound of them and
unpainted MM-161S."
MDF absorbs a coating material
rapidly.
So, it requires the knack and
perseverance.
1.
He painted them twice with
a sanding
sealer for
wood filling.
2.
Next he painted them
twice with oil-based urethane
varnish on
it.
3.
Finally, he sprayed clear lacquer on
it.
He says I failed to spray it.
Looking closely at
them, they have traces of shrunken lacquer
by chemical
action.
But from a distance, they are very beautiful
finish.
It shows that he did the work politely.
ALTEC
CF404-8A |
MM-161S |
The cone papers of ALTEC CF404-8A are bright in
light.
From what I have heard,
he painted them with
expensive coating agent.
The coating agent was developed by
a German company.
(At that time, SSC remain to
be developed.)
MM-161S:
220(W)X450(H)X250(D)mm
|
|
Mr.S, Saitama Pref.
March
2005 |
|
CF404-8A
I bought
MM-151ST and ALTEC CF404-8A a week ago.
I felt helpless to
the low tone.
I played over the next 3 days from morning
till night.
Even so, I still felt helpless to the low
tone.
So, I got to work on the regulation inside the air
chambers.
I removed the associated needle felting
from the air chambers.
I
made mock Tozawa styled resonaters with
kraft paper
and
put each 3 mock resonaters into the air
chamber.
Surprisingly, the low tone began to come
out.
Aha! This is Hasehiro back loaded horn
sound!
I was impressed, and I listened to much music
about 2 days
but it seems that the sound of one band
frequency
become promiscuous by the audio
source.
So, I changed to each 3 mock resonaters
with
half of the associated needle felting.
It was
very coherent sound, but it was also dark and dusky
sound.
I changed to each 3 mock resonaters with
quarter
associated needle felting from the results.
It had come
close to my favorite sound.
Eventually, I was achieved
by the combination of
each 4 mock resonaters with
quarter associated needle felting.
I found that I like a
meek and a gloomy sound
from this acoustic tuning.
I
consulted Hasehiro MM owner's sites for the
tuning.
There is quite a lot of acoustic absorption
materials
than the other MM owners.
I used Rogers LS3/5A
speakers up to now.
This may be the cause of
that.
I already enjoyed the appeal of audio too
much.
Hasehiro MM series allows the owners to enjoy the
difference
between the sound by change of drivers.
So, I
can enjoy it for many years to come.
Let me express my
heartfelt appreciation to you for development
of great DIY
kits.
MM-151ST:
190(W)X710(H)X250(D)mm
|
Mr.U, Yamagata Pref. 
January
2005 |
Excerpt from His
Website
http://www13.plala.or.jp/e_doremi/contents%20etc2.htm
Hasehiro back loaded came to home in the
summer of 2004.
I bought MM-141S and DIY Audio
SA/F80AMG
in by a fetching sound words:
Exponential
curved back loaded horn speakers make
by stacking boards,
and because I want to hear back loaded sound.
MM-141S with
DIY Audio SA/F80AMG
The
opening of horn is
a beautiful curved surface
without
irregularity of the mutual joined
parts.
So, MM kit is easy to make.
Hasehiro Audio
does a good job!
MM-141S with DIY Audio
SA/F80AMG
has disparate sound that is
different
from bass reflex
and closed
enclosures.
It has light and crisp sound, |
the opening
of
horn | and plays unbelievable bass despite
8cm drivers.
This is probably back loaded horn
sound.
Even so, the treble extends beautifully.
I
am tempted to doubt whether it is a full-range sound.
Now I
understand why DIYers make back loaded horn speakers
with a
single full-range speaker driver.
I had a low opinion
of full-range speaker driver
until I listened to the sound
of MM-141S with DIY Audio SA/F80AMG.
Audio is really
deep.
In January 2005, I gave MICRO COMPONENTS power
into MM-141S
despite it has good sound.
speaker
cable #209 |
 |
First I replaced the speaker cables with #209
copper single wire
wrapped in silk.
#209 is formed in
spirals, I can see maker is dedicated to it.
SR
conductors |
Next I also replaced
the internal wires
with #209.
And I naturally attached
SR conductors,
too.
I used cotton
ropes as
insulation
of SR conductors.
It goes without
saying that
it is improved
further. | The sound roughness has gone, and it
became a calm sound.
Needless to say, SR conductors have a
profound effect.
| internal wires |
| upside |
#209 copper single wire
wrapped in silk with SR conductors |
| underside |
Hasehiro standardized
wire |
MM-141S:
160(W)X450(H)X250(D)mm
|
| September
2005 |
That happened in a flash.
Suddenly my
second son turned the volume knob of the
amplifier
fully clockwise and turned on it.
There was
smoke coming from the MM-141S with SA/F80AMG
with a
loud noise, and it gave off a bad smell.
Yes. . . . DIY
Audio SA/F80AMG was raised to the skies.
So I bought
Tang Band W3-1231SH that everyone is talking about.
The
positions of the mounting holes are quite identical
to DIY
Audio SA/F80AMG.
I could easily exchange SA/F80AMG for Tang
Band W3-1231SH
without any struggle.
MM-141S with Tang Band W3-1231SH
The exchange totally changed the atmosphere
around here.
Of course, the sound of Tang Band W3-1231SH is
completely different
from DIY Audio SA/F80AMG.
When
listening to music for a short time, I think that
SA/F80AMG
is better because its treble spreads well and it
has a colorful sound.
But when listening to music for a
long time and watching videos,
I think that W3-1231SH is
definitely better.
The middle and low ranges are rich
and powerful sound
not causing fatigue.
Above
all, it plays vocal at a voluminous sound.
If they
were seasoning, SA/F80AMG is seasoned
with refreshing soy
sauce, and W3-1231SH is seasoned
with heavy Worcestershire
sauce.
Both are excellent, the preference varies from
person to person.
http://www13.plala.or.jp/e_doremi/contents%20etc2.htm
MM-141S:
160(W)X450(H)X250(D)mm
|
Mr.A, Roseville, CA,
USA
January
2005 |
I moved to California from Tokyo.
The
furniture to be moved is mostly audio instrument.
I left
MM-151S with DIY Audio SA/F80AMG at empty home in
Tokyo.
And I brought MM-161T with FOSTEX
FE108Eƒ°,
brand-new MM-151S kit and 4 speaker drivers for
contrast study
into an apartment in Roseville.
4 speaker
drivers are FOSTEX FE107E, DIY Audio SA/F80AMG,
ALTEC
CF204-8A and FOSTEX FE88ES-R.
FE107E
FOSTEX FE107E plays anything with a sophisticated
beautiful tone,
and bass is OK.
SA/F80AMG
Bass volume is the
best among 4 speaker drivers,
but FOSTEX FE88ES-R is the
best about the resolution of bass.
Besides, DIY Audio
SA/F80AMG wants a tweeter
depending on the sound
source.
CF204-8A
ALTEC
CF204-8A lacks bass volume by mounting on MM-151S.
I
put importance on resolution capability.
And I have wanted
to know the origins of sound sources and amps.
So, I will
eventually mount FOSTEX FE88ES-R with brass ring
on birch
baffle brand-new MM-151S.
I filed off the width of birch
baffles because of drying shrinkage
of MDF layered
boards.
my
apartment's study
birch baffle MM-151S with brass ring for FOSTEX
FE88ES-R
Pre-amplifier is No.170 hybrid MC and
power amplifier is
previous-generation GOA: ground
output format designed
by Dr.Akihiko Kaneta.
I
put MM-161T with FOSTEX FE108Eƒ° in a living room,
and I'm
listening to Anner Bylsma J.S.Bach Sonatas for Viola
da Gamba
with writing this e-mail at midnight.
Even
small volume, MM-161T with FE108Eƒ° can write the
expression
of violoncello piccolo manufactured in
1700.
I guess it's because the
amplifier with the loudspeaker is good
attack.
my apartment's
living room
MM-161T with FOSTEX FE108Eƒ° |
I got sea parcel posts
and unpacked
them.
And I retighten up screws of
MM-161T.
All
parts shrank by drying,
and it caused space
between
the baffles and the layered boards
with
the side boards.
So, I made order for
renewed
baffles.
After that, MM-161T with FE108Eƒ° is
also
playing music in top
condition. |
Standing
wave was prominent in
both rooms when they had
a few furniture, but it became
better than before.
I need to reset their
positions.
I would like to make Hasehiro friends in the
United States.
MM-151S:
190(W)X450(H)X250(D)mm
MM-161T:
220(W)X900(H)X450(D)mm
|
Mr.S, Akita Pref.
January
2005 |
|
FE166ES-R
I bought FOSTEX FE166ES-R, and
mounted on my MM-171.
I was barely able to put FE166ES-R
into the baffle aperture
because of a big magnet, it's a
good sound.
MM-171 with FE166ES-R plays with bright
tone
because I think the magnet is strong.
It has a
powerful rich sound.
I was concerned about the excessive
treble,
but it was my imagination.
I have pocket books
in the air chambers of MM-171
as noise absorbing materials,
it may be good.
FE166ES-R will play more deep bass if
mount on my MM-181T,
but I'm thinking about enjoying
the process of MM-171
with FE166ES-R because I set up it on
a shelf.
MM-171:
250(W)X450(H)X410(D)mm
|
Mr.Y, Yokohama
City
August 2004 |
I bought MM-191T during the New Year
holidays,
and I mounted LOWTHER PM6A.
I was absorbed in
the monaural sound for about three months,
but I came to
feel that the undertone is otherness feeling.
It's a
wonderful undertone, it extends even low-tone
range.
However, it seems unnatural.
There is a
difference between the undertone
and the
high-mid-pitched tone.
So, I took a go at the reverse
back loaded horn system. |
MM-191T reverse back loaded horn system with
LOWTHER PM6A
|
I pushed a temporary baffle board into the
horn openings
and remounted LOWTHER PM6A.
The legitimate
front baffle boards remain open the mounting hole
for
drivers.
It has an excellent natural sound, necessary and
sufficient undertone.
A rumbling of the floor-like
undertone
during the back loaded horn system hasn't come
out.
I loved its natural and a sharp
sound.
PM6A
I was screwed shut the
baffle boards for the reverse system
and covered the
legitimate baffle boards with saran nets.
I developed a
taste for piano trio from the date of purchase
MM-191T.
Furthermore, I feel fabulously interested in
developed
a tenor saxophone and female vocal music such as
Solveig Slettahjell
since changing the system to
the reverse back loaded horn.
 Optional Extras for Reverse
System
MM-191T:
310(W)X900(H)X450(D)mm
|
Mr.W, Shiga Pref.
July
2004 |
I purchased MM-161.
The assembling work has
been completed successfully in one hour
because I purchased
MM-141T before.
I changed the internal wires to lead
wires one by one,
and I soft-soldered its crimp
contacts by silver
solder
after swage
it again.
Furthermore, I bonded the all MDF boards
except the baffle
that form the back loaded horn with
wood
glue.
I
sanded the MM-161's surface with abrasive
paper lightly,
and
I sprayed it with acrylic
lacquer
colorless.
FE126E
The speaker driver is FOSTEX
FE126E for the back loaded horn system.
It was
unspeakable sound.
Half a day after it became mild sound a
little, but it still...
I took off the baffle
board of MM-161 and took off FE126E.
Then it was
elevated above the baffle level around the screw
holes
on the baffle board.
I pruned away it with a knife
and remounted FE126E
on the baffle board and placed it on
MM-161 again.
The next day, several hours
after the bass tone came out a little
and it has
got a balanced sound.
The day after next, I
took off the baffle board again and
removed
needle
felting from
the air chamber.
Instead I put the Tozawa styled resonaters inside the air
chamber.
Lowly-extended bass came out, but I felt short on
fun.
FOSTEX sound is not for me...? |
|
On the following day, I thought the
air chamber may be too big
for rich bass.
So I put a
comic book inside the air chamber.
Wowie!!
I put a more comic book, but it was
out of punchy bass.
So, I put only one comic book inside
the air chamber,
and I listened to a variety of
CDs.
I was so
impressed!!
It became a satisfactory sound, and it was
past MM-141T.
Hasehiro MM series is wonderful speakers
with a depth
in which all the emotions such as expectation,
insecurity,
frustration and delight are
intermingled.
CDP: marantz SA8400
| AMP: KT88 class A |
MM-161 with FOSTEX FE126E
MM-161:
220(W)X450(H)X410(D)mm
|
Mr.F, Chiba
Pref.
June 2004 |
|
I upgraded over 3 hours.
I am
totally burned out, I need to get into shape
to enjoy my
audio life.
I want to change the mounting place of ALTEC
755E to a rear
and a front mounting.
I want to have
control of the bass by sound absorbing materials, etc.
So,
it is just trial fitting. (MM-191T with ALTEC 755E)
For
now, I mounted ALTEC 755E on the front baffle
boards.
755E
I listened to jazz music.
From
the start, I received electrified feeling.
It is the power
of MM-191T back loaded horn system
with good 20cm
full-range drivers.
ALTEC 755E drivers are used commodity,
so they didn't need its aging.
It has good bass and a
tremendous impact than I ever imagined.
I think that it is
ALTEC's excellent skills for making sound.
The sound has
fat depth feel.
I put JBL 077 tweeter on 8kHz, but it
was out of balance.
I will try the different tweeters in
the days ahead.
(subsequent day)
It was
well-balanced sound when I put PIONEER PT-R7A
tweeter.
MM-191T:
310(W)X900(H)X450(D)mm
|
Mr.A, Chiba
Pref.
March 2004 |
SA/F80AMG
Last month, I bought MM-141S and DIY Audio
SA/F80AMG.
I have finally been painted in a month.
I
regret that they were lacking in uniformity,
so I
explain the process flow for your future
guidance.
1.
I bonded all the parts with
a school
glue,
and
remove the glue out of the surface of the boxes with a
wet rag.
2.
I polished the boxes with 300-grit
sandpaper.
(file
off the glue out of the surface of
the boxes.)
3.
I applied a sealer to
prevent the absorption into the wooden basis.
Hasehiro said
"Sanding
Sealer",
but I couldn't find it
at the neighborhood DIY store.
So, I bought "Wood
Sealer"
instead.
4.
I repeated the 2nd and the 3rd
steps two more times.
(a total of 3 times) I
spent about 6 hours on these drying.
5.
I applied dilute
oil-based pigmented
varnish (1:3)
on the boxes.
They were already lacking in uniformity at
this step.
So, I sandpapered the boxes for clean away of a
layer of a sealer.
But I didn't take it off, I have given
up it.
6.
Varnish work - Drying (until the next
day) - Sanding (300-grit)
I continued the process flow over
a 5-day period.
But the color still came out too
light.
7.
So, I changed the process
flow.
Varnish work 3 times - Drying (until the next
day) - Sanding (300-grit)
Even so, the color still came out
too light.
I changed to doubling-diluted oil-based
pigmented varnish. (1:2)
And I used 1000-grit
waterproof
sandpaper.
8.
I
continued the 6th step over a 3-week period.
Then, I
completed the work with 2000-grit waterproof
sandpaper
and polishing
compound.
=
When I Look Back on The Work, I Have Moments of
Reflection.=
A.
I
should have taken more each drying time at
the step-4.
B.
Mischoice of method; I should have
colored the boxes with oil
stain,
and
I completed the work with transparent
varnish
if
I hope to complete it in a short time for a deep
color.
Actually, I am intended to emphasize the midrange by
overpaint
on the boxes with oil-based pigmented
varnish.
I achieved a level of success on that
point.
C.
I should have taken more drying
time at the step-6 and 7.
= My Initial Feelings
About The Sound =
a.
MM-141S with DIY Audio SA/F80AMG
chooses the musical genre.
I listen to jazz, rock and
Western popular music.
They play the acoustic instruments
in a great tone color.
They portray the minutest details of
its instruments,
and booming deep singing voice.
But in
the electronic instruments, they are more than singing
voice.
b.
MM-141S with DIY Audio SA/F80AMG
have a great thickness
and expanding undertone. Contrabass
comes to me.
It's hard to imagine that they are just 8cm
drivers.
c.
I'm very happy with the high-tone
range
because I used one 20cm full-range speakers up until
now.
I hope that the high-tone range stretchs forth
more
with the advance of aging.
d.
MM-141S with DIY
Audio SA/F80AMG can evaluate
the recording condition.
To
my surprise, I am now able to understand the
poor recording CD.
I have mixed feelings a bit happy
and a bit sad.
I'm happy with Hasehiro
speakers.
MM-141S:
160(W)X450(H)X250(D)mm
|
Mr.K, Gunma
Pref.
February 2004 |
|
CF204-8A
2 weeks have passed since I mounted ALTEC
CF204-8A on MM-151S.
You said,
"If you
drill the pilot holes in the front baffle boards with a
gimlet shallowly, you can easy to insert the mounting screws
for drivers."
So I bought the mounting
screws and
a gimlet in
advance.
I pulled the banana
plugs for
high-tone range from YAMAHA NS-8HX
for a movie
theater.
Then, I inserted its plugs on the back of
MM-151S.
I listened to Kristina & Laura with
only 2ch.
Graphic string, particularly I felt so real the
reverberation of the body
of a violoncello.
The high
note was more smoothly,
but the deep bass was more weaker
than I had expected.
I played a digital radio broadcasting
at lower volume all night long
after playing some
CDs.
The next day, I put some CDs.
The
sound was more smoothly than yesterday, the bass
also.
I removed the associated needle feltings on
trial, and listened.
That sound was too intense for
me.
It needs something as sound absorbing
materials.
I wanted to try "Transmission
Line System"
I put clamshell tissue paper in
the air chambers
to block the entrance of the
horns.
Tight bass, only the somber bass came out from the
horn openings.
The sound of the front of the drivers came
out from their fronts.
MM-151S with ALTEC CF204-8A played
in triumph,
but I felt that the sonic palette
decreased.
That's like the sound from general
loudspeakers.
This is good, but I bought back loaded horn
speakers.
I made some paper towel resonaters.
I rolled half-cut A4 paper
and stuck it with paste.
"Bass Reflex Port...?"
"Staggered...?"
I erected of 2 paper towel resonaters of
different lengths
at both ends of the air chambers.
I
like the sound, and I felt that the bass began to spread
well.
Let's take it.
Now MM-151S with
CF204-8A plays for an independent system away
from AV
center.
Kristina &
Laura CITY OF DREAMS
Taro
Hakase Sally Garden Set
Taro
Hakase Wild Stallions
Taro
Hakase Airborn
Taro
Hakase Hungarian Rhapsody
No.2
Wynton Kelly KELLY
BLUE
Sarah Vaughan Crazy and
Mixed Up
Bill Evans Trio Re:
Person I Knew
United States Marine
Band Ride of the Valkyries
I listened to
all kinds of CDs.
Jazz is excellent.
Strings are so
realistic; the violin, the violoncello, the Chinese
fiddle,
the guitar, the cembalo, the harp, the arpa
etc.
Human voice and female vocal go to the front;
Cecilia Bartoli has a
transparent voice, and I can
feel the warm glow.
Norah Jones feels thirstier
than usual in a languid voice.
Boys Air Choir has
a transparent high note.
Maybe DIY Audio SA/F80AMG is
better than ALTEC CF204-8A
about mid-low range, but
CF204-8A has a higher resolution,
sense of the metal sound
and string.
And ALTEC CF204-8A plays the rock music such as
Avril Lavigne,
pop music and Grammy
Nominees.
"Backloaded Altec"
The combination
of MM-151S and ALTEC CF204-8A
gives an air of
inclusion.
ALTEC CF204-8A is worth well more than the
measured values.
I think MM-151S with ALTEC CF204-8A is
more than acceptable
for a movie theater use, too.
I
can take MM-151S apart at any time,
and I can enjoy the
change of the sound by different tunings.
First, I will
polish the horns with sandpaper.
MM-151S:
190(W)X450(H)X250(D)mm
|
Mr.Y, Tokyo
January
2004 |
I gain much satisfaction
from MM-141S with DIY
Audio SA/F80AMG.
I got customized brass adapter
rings
for further improvement of the sound quality.
As
expected of professionals, it was the right size
to
the width of the front baffle board, and the excellent
workmanship.
MM-141S with
brass ring for DIY Audio
SA/F80AMG |
I could get a
very pleasant sound and resolution
with good sound of
MM-141S.
MM-141S:
160(W)X450(H)X250(D)mm
|
Mr.Y, Tokyo
September
2003 |
(He bought custom-ordered
MM-191S)
Excerpt from His Website
http://www.clarte.tv/hasehiro.html
In
this production of the speakers,
I want to
thank Sunvalley and Hasehiro Audio.
They cater to my
various special demands.
I brought trouble to
them
because it was uncommon driver unit
arrangement.
But I couldn't help it
because I was able
to obtain the woofer KEF B110C
and the tweeter
T27 of KEF LS3/5A.
Good
sound!
MM-191S with KEF B110C/T27
MM-191S:
310(W)X450(H)X250(D)mm
|
Mr.N, Kanagawa Pref.
July
2003 |
Yearning JBL D208 full-range speaker
driver
by James Bullough Lansing.
MM-181T with
JBL D208 |
JBL D208 was used for
back loaded horn
loudspeaker of the original Hartsfield
D30208.
D208
That's a gentle plaintive sound, but
that's not toothless and
not fuzzy sound.
Somehow that's
sensitive and an amorous sound.
I think MM-191T is better than MM-181T
because
of I felt like JBL D208 plays melodiously
on the whole
baffle board.
So, I will change MM-181T to MM-191T anytime
soon.
MM-181T:
280(W)X900(H)X450(D)mm
|
Mr.K, Oita
Pref.
July 2003 |
In the past, I had 2 back loaded horn speaker
systems.
One was branded kit speaker but it was
helpless ungodly noise.
The other was king size
speaker loaded with 2 drivers.
My friend said,
"The sound was audible from
outside."
Eventually I gave up the king size
speaker
in consideration of the neighbors.
About
8 years later, every time I listen to the back loaded
horn sound
at my friend's home,
I desperately wanted
back loaded horn speaker again.
I made expectations on
Hasehiro back loaded horn's potential
and I bought
MM-191T
because I have 20cm full-range drivers of 3
sets.
I guessed right!
What were previous my back loaded
horn speakers?
I was surprised by the
first voice without tweeter!
It has a tight low range
with adequate hardness and elasticity.
And it has
a well-projected midrange.
Previous my back loaded
horn speakers didn't come out it of
the mid-low
and the midrange, so I used tweeter shiftily.
I
listened to a lot of vinyls and CDs without any
change.
It seemed to me that it doesn't have a weak
source.
I was surprised, too.
FE207
Nevertheless, FOSTEX FE207 I bought
10 years ago has
a poor high range.
So, I added FOSTEX
FT66H tweeter across a capacitor of 1ƒÊF
in the reverse
direction without attenuator,
and I listened to the sound
again.
It can also be used as monitor speaker
because it
played unbelievably well!
By the way, I don't put any
acoustic absorption materials
into MM-191T.
I found a
new sound! I got a good thing, thank you!
I would like to
join the MDF boards of MM-191T with a bond.
(subsequent day)
I was bonded.
It drove the
center of gravity of the sound down
over the whole
range if it increased the rigidity.
In particular, I feel
better about the extrusion capacity of low range.
The
mid-high range had settled down pulled over to the horn
but
grew in thickness.
So, it became listener-friendly
vocal.
Overall, it were growing in an acoustic
scale.
And I feel a sense of
togetherness with FOSTEX FE207 because of
the
increasing density.
So I feel compelled to turn up the
volume.
As may be expected of the back loaded horn
system,
it has a sound of 40cm class scale such as
percussive roll
and contrabass note.
EAS-20F20
I exchanged FOSTEX FE207 for
Technics EAS-20F20.
Technics EAS-20F20 pushes sound out of
the way in full scale
compared to FOSTEX FE207 if it has a
forceful magnetic circuit.
The low range is powerful and it
has a braking power.
So, I can feel bass margin.
It has
a slightly habit of the metal center cap, but
surprisingly
it is ear-pleasing sound.
But it is
reasonable if the source is a recording with a weak
bass.
FOSTEX FE207 has a sensitive sharp sound, but a
smallish audio image
such as a compact speaker.
That's
OK, but I need more voluminous sound.
Still, it seems to
extend the lower range.
For now, I intend to continue the
aging of Technics EAS-20F20.
By the way, I don't put any
acoustic absorption materials
into MM-191T still
now.
AMP: SANSUI AU-ƒ¿907LE |
Cartridge: DENON DL103LCII
Analog player:
DENON DP-57M | CDP: KENWOOD DP-990
SG
MM-191T:
310(W)X900(H)X450(D)mm
|
Mr.Yoshida, Nagano
Pref.
June 2003 |
|
SA/F80AMG
I was surprised
at the good sound of MM-141S
with DIY Audio
SA/F80AMG.
I thought; "Mount FOSTEX 6N-FE88ES in hand
into a bigger size."
So, I ordered custom-sized MM-141T and
built.
All of the audio sources are
room-filling sound.
I felt the spread of the
space.
That's because MM-141T produces deep bass.
That
deep bass is different from distorted deep bass by sub
woofer.
That deep bass is a natural sound.
This is
particularly prominent at organ in the classic
music
and choral music.
It's hard to imagine that FOSTEX
6N-FE88ES is only 8cm drivers,
they have orotund deep
bass by MM-141T.
I don't have the measuring equipment,
so I don't know
the low-frequency range.
But I can hear
properly.
|
MM-141T
with FOSTEX 6N-FE88ES
|
One of jazz music is live recording,
and the other is vocal music.
The ambience of a concert
venue before the performance moves
through the air with
high realistic sensation
when I listen to the live
recording.
I feel great confidence to the sound of the deep
bass
with a strong foundation.
I develop an illusion
that they sing songs in front of me for real
when I listen
to the vocal musics including J-pop.
Custom-sized
MM-141T is deep depth, but it's narrow width.
So, they take
up less space.
I left for my new post without my
family.
So, they are set up in a small apartment
now.
Eventually, I will set up them in the living room
of my house.
And I plan to enjoy TV and movies with my
family.
I don't feel the need for 5.1ch and sub
woofer.
I am very pleased with just one small
full-range speaker driver.
I will use MM-141T with S type
habitually.
6N-FE88ES
Compared
with my main bass reflex speaker ALTEC 755E,
MM-141T with
FOSTEX 6N-FE88ES is the lack of bass and hard sound.
Maybe
it would be a range of the driver.
Anyway, I can do nothing
but marvel at just 8cm driver.
Thank you for good
speakers.
Classic
J.S.Bach: ORGELWERKE
Ton
Koopman
J.S.Bach: St. Matthew
Passion Georg
Solti Chicago Symphony Orchestra
A.Dvorak: Symphony No.7
Eugene
Ormandy Philadelphia Orchestra
Jazz
LIVE AT BLUE NOTE TOKYO
Michel Petrucciani
Trio
GIRL TALK
Holly Cole
Trio
J-Pop
pure acoustic Taeko
Onuki
CDP: Rotel RCD-971 |
AMP: ELEKIT TU-8730
TUBE: JJ 300B and
Sylvania 6SN7GT
MM-141T:
160(W)X900(H)X450(D)mm
|
Mr.Takeuchi, Kanagawa
Pref.
January 2003 |
In theory,
I understood I can get a wonderful
bass tone by MM-1111T.
But I was
afraid whether the bass tone would be in
harmony
with the mid-high tone quality of Eurodyn.
MM-1111T played a shapely rich
bass like a charm, and
I could listen to the vintage
Eurodyn sound for the first time.
Eurodyn had a sound
of worldwide fame at the present day, too.
I drove MM-1111T
by Mclntosh C22 with MC275 to honor Eurodyn
over 30
years ago.
Particularly, the vocal is
great.
Eurodyn is dressed in armor like a griddle
and the impedance is 15Ħ.
So it makes a strong personal
statement.
I had a try in various ways but they failed
the whole.
It remained on the shelves but it was
really nice I has kept it
until now.
There's only
one person in the world.
So, I am filled with a
feeling of superiority. Thank you very
much,
Hasehiro.
MM-1111T:
370(W)X900(H)X450(D)mm
|
Mr.Yasuo, Setagaya-ku,
Tokyo
December 2002 |
|
I use ALTEC
604-8K as main loudspeaker, and ALTEC 755E
as
subspeaker.
I mounted both ALTEC 205-8A and ALTEC 405-8H on
MM-151.
I rear-mounted 205-8A, and front-mounted
405-8H.
It had an unexpected result.
Inexpensive
ALTEC 205-8A had a much better than ALTEC 405-8H.
205-8A
First I mounted ALTEC 405-8H on
MM-151 from the front.
And I aged it for 4 consecutive days
by
tough 300B single-ended amplifier.
Then, I
compared it to BOSE 121. Is this back loaded horn
sound...?
But BOSE 121 holds its own with ALTEC 405-8H
with MM-151.
Then one day the custom-made baffles
(the front aperture is 100mm
and the back aperture is 93mm)
arrived at home from Hasehiro.
I mounted ALTEC
205-8A on the custom-made baffles.
Similarly, 205-8A is
brand-new drivers.
But it's a good sound from the
beginning.
It's definitely bright and lively ALTEC
sound!
Particularly, ALTEC 205-8A is better than ALTEC
405-8H
about high-tone range.
At least, I thought ALTEC
205-8A suits MM-151 better than 405-8H.
Both drivers have
the same magnets, but their cone papers
and edges are
different, sound is so different.
Like Western Electric
WE755A and ALTEC 755E...
Will I paint it
ALTEC-GRAY...?
Will I purchase MM-T for ALTEC 755E next
year...?
I use ALTEC 755E on closed boxes with ALTEC 3000H
tweeters.
MM-151:
190(W)X450(H)X410(D)mm
|
| January
2003 |
|
755E
Soon, I bought MM-191T.
I
remounted ALTEC 755E from closed boxes to MM-191T.
I bought
755E before because I couldn't buy Western Electric
WE755A
at that time.
755E cones became free, and clogged
bass blew over by MM-191T.
Originally it is modest sound,
so I felt weak sound
on the mid-high note after
that.
They are still need ALTEC 3000H tweeters.
I
want to hear music by WE755A with MM-191T.
Recently, I
bought JBL D208.
The logoed stickers include the phrase,
"JIM LANSING signature"
So, it's very likely that they are
very old.
They have alnico magnet and fixed edge, but they
were replaced
cone papers by JBL.
So, they have
brand-new cones and caps.
I compared the sound of
them to the original when I bought.
They were
comparable to the original.
|
JIM LANSING signature D208
|
I bought JIM LANSING signature D208 for
MM-191T.
D208 was released in 1947, Western Electric WE755A
was also
released in the same year.
It's the same with
alnico magnet and fixed edge.
D208 played on the
historic known back loaded horn loudspeaker
"Hartsfield"
It's hardly
possible that D208 doesn't fit MM-191T.
D208 has
started to show its abilities by degrees.
MM-191T
with D208 is great!!
I heard the sound alternately
D208 and Lowther PM6A over again
and
again.
Eventually, I chose D208 as the master of
MM-191T.
I can enjoy the D208 sound without
tweeters. |
(RS) MM-191T with JBL D208 and PIONEER
PT-R9
(LS) MM-151 with ALTEC
205-8A
|
But I put PIONEER PT-R9
tweeters on 9kHz or later (-12dB/oct)
without attenuator in
phase.
That is terrific!!
PIONEER PT-R9 is for
a large system.
Such super tweeters match well with MM-191T
with D208,
means MM-191T with D208 demonstrated a high
completion rate.
I think that 20cm full-range speaker
driver has many fans.
I would recommend MM-191T
without hesitation.
MM-191T:
310(W)X900(H)X450(D)mm
|
| February
2003 |
I'm glad I decided to mount JBL D208 on
MM-191T.
What about JBL LE8T...?
I bought it with JBL
PR8 passive radiators as JBL L44 Lancer.
JBL LT8T that I
bought is early type of white rubber edge.
(produced until
about 1973)
First of all, I listened to the sound of
JBL L44 Lancer.
It was good for more than 30 years
ago.
But the hardened edge has a negative consequence for
the sound
due to the passive radiator system.
Next,
JBL LE8T is mounted on MM-191T to preview the sound.
Its
magnet is bigger than JBL D208, but its cone paper is
heavy
in weight and it's rolled edge.
So, there is strong
evidence that JBL D208 is better suited to
back loaded horn
system than JBL LE8T.
But audio is not explained by theory,
it's really an issue of the liking.
It was very
good.
The hardened edge doesn't have a negative consequence
for
the back loaded horn sound.
JBL LE8T has good
chemistry with JBL 2405 alnico tweeters (16Ħ).
But,
compared with JBL D208, LE8T has weak response to
sound,
and blunt drumbeat and bass sound.
However, it's
powerful good sound out of doubt compared
with JBL L44
Lancer. |
MM-191T with JBL LE8T and JBL 2405
|
MM-191T with JBL D208 is suitable for
classical music, and MM-191T
with JBL LE8T is suitable
for jazz music.
I drove them by Western Electric
300B single-ended amplifier
and McIntosh C22 special
edition preamplifier.
MM-191T:
310(W)X900(H)X450(D)mm
|
|
|
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world.
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