|
Mr.A, Fukushima Pref.
July
2010 |
|
(He
purchased the
upgrading parts from MM-151
to MM-171.)
I received the upgrading parts
today.
I immediately upgraded to MM-171 from MM-151,
and the drivers are
FOSTEX FE166En.
I was using DIY
Audio SA/F80AMG on MM-151, and I thought
SA/F80AMG is a
great driver for just 8cm.
But very, very different by
changing to twice the size of driver.
I feel natural
cohesiveness from midrange.
Vocal part was much better, and
it would be better off in time.
I don't feel habit of
backloaded horn system.
It reminds me that MM kit is a
superb product.
Thank you very
much.
MM-171:
250(W)X450(H)X410(D)mm |
He living
in Kanagawa assembled MM-141S and painted.
Then
he mounted DIY Audio SA/F80AMG on them. |
 |
 |
He gave the both sides and the baffle surface several
coats
of sanding sealer, and sanded.
He chose not to
sand the cutting surface, just coated with
sanding sealer
to prevent absorption.
The top coating is black lacquer
spray.
He sprayed it several
times.
MM-141S:
160(W)X450(H)X250(D)mm |
Hasehiro
Audio
April 2010 |
|
\ Report
from Hasehiro \
We have finally been completed
custom-made bonded type and SSC
coated MM-151TK from Mr.T.
 |
FOSTEX's limited
driver MG100HR-S
has a pure magnesium
diaphragm,
and it has a sense of speed
with
clear-cut sound. | We
mounted MG100HR-S on the bonded type SSC-MM-151TK.
It became more high-resolution
brilliant sound than I thought.
Listening to drum session,
the sofa makes a quick change to body
massager.
That's
floor-shaking amazing bass, although it's only 10cm
driver.
I think he will like them a
lot.
MM-151TK:
190(W)X900(H)X450(D)mm |
bonded type SSC MM-151TK with
MG100HR-S
(screwed the side
baffle boards up tight,
too.)
|
Mr.Oguro, Hyogo
Pref.
October 2009 |
|
It has been a
month since I asked you the adhesive joining and
the horn
painting at Hasehiro audition gathering in
Nanba.
I
painted MM-141S at last.
The basecoat is aqueous urethane
first coating material for
exclusive use.
After that
it's so shiny, so I thought of giving up the overcoat
many
times. |
after
basecoating
|
The coating material is vermilion red of
synthetic japan.
Synthetic japan get dry quickly compared
to cashew japan, so it may
be said that synthetic japan is
popular coating material.
My family said "There are
mailboxes." or "There are bird feeders."
I painted three
times now.
(An omission)
Before, I read an
article in your website "The sound became docile
if painted
with japan."
So I wanted to do this because once.
That's
called a "japan red model." |
after overcoating
(three times)
|
Well, I will report on the
sound.
Originally, it was shiny sound by
Vifa TG9FD drivers.
But what's
more, it is because
mirror-shiny clear sound.
I've
seen many times,
"The paint turned up the
volume."
Rather, I think it is more natural
to
say
"There was no more need for
turn up the volume by
the paint."
Because, the expression of
musical
instruments and sound
source became fineness and
rich.
As proof of this, I don't feel that
it's too loud
when I listend at the
original volume level, I feel
that
it's powerful sound.
|
Until now, I couldn't listen to the symphony,
big-band sound and
the like because of a ball's
sound.
Right now, the individual instruments became
separated.
So I can listen to them with a comfortable
feeling now.
Vifa TG9FD with Brass Baffle
Stabilizer
|
The scrape comes still short, but I tucked own
brass parts into the
groove between the front baffle board
and the side plates.
That's called a "BBS (brass baffle
stabilizer)", that's mere decoration.
(An
omission)
From now on I will paint the synthetic japan
more than 20 times.
The thickness of japan could adversely
affect...
If so, I will cry on
your shoulder...
MM-141S:
160(W)X450(H)X250(D)mm |
collaboration the housing
exhibit
| 
Mr.Ishikawa, Iwate Pref.
June
2009 |
|
I painted
MM-151S.
First, I transfuse school glue to the whole
with a damp cloth.
After drying, I polish the whole with
sandpaper.
I repeated the workflow three times and
painted aqueous clear coating
over this.
Then, I polish
the whole with sandpaper.
I repeated the
workflow three times, too. |
MM-151S
Finnish birch
baffle |
Incidentally, I changed the front
baffle board
to Finnish birch 18mm thick.
Well, the
sound was...
Hmm.
The sound like something was
clogged up.
That couldn't be...
It fell short of our
expectations and we
walked away
disappointed.
There was no effect of hard Finnish
birch.
I explored possible solutions on the
Internet.
I learned that the cutting of the back of
the
front baffle board is effective in improving
the
performance for small speaker drivers.
I tried but I
couldn't whittle away at the
birch caused by hard
material.
So I asked a carpenter to that.
Now, I can see
the cone of the driver in full
view from the back of the
front baffle
board.
The result...
It was a great
success.
The lack of the high-tone range disappeared
and
the mid-high-tone range feels so good. |
It is totally satisfying flat feeling.
If
saying severely is that I want to plus 1.5dB around 3kHz and
minus
1.5dB around 250Hz.
I want to try the noise
absorbing material as the final adjustment.
What's the sound coming to?
MM-151S:
190(W)X450(H)X250(D)mm |
Mr.F, Gunma Pref.
April
2009 |
|
I bought PARC Audio
DCU-F131W drivers and
SSC
coated front baffle boards.
It has been about 10 days since they started
playing. So I report.
This is the first
time MM-151S has been replaced in 5 years.
Five
years have passed since I replaced from TANNOY SYSTEM
12
DMTII to ALTEC CF204-8A mounted on MM-151S.
I have
thoroughly enjoyed without regret during the past five
years.
But I was interested in Victor's wood cone
driver.
I have come to replace to PARC Audio DCU-F131W due
to the good
reputation of its wood cone
driver.
MM-151S is dry perfectly in the past
5 years.
I bonded the MDF board to one another with
Titebond, and I gave the
surface five coats of oil-based
urethane varnish.
Let's start off with CF204-8A.
To my
surprise, I couldn't listen to the violin due to the strong
stimulus
to my ears until now, but I could listen to it
with comfortable.
I had an aha moment, I didn't think it
changes a lot by bond and coat.
I mounted DCU-F131W on
the SSC coated front baffle board.
Before the mount, I gave
the surface of SSC baffles two coats of
oil-based
urethane varnish. |
MM-151S with PARC
Audio DCU-F131W
|
I'm surprised the amazing bass from the
beginning.
But it had a poor sound in some
of the mid-high-pitched tone.
So, I put both of each
other face-to-face and connected one channel
by
reverse phase.
And I leave them for about 4 hours
after turned up the volume.
After that, they played CDs and
a TV playing till now.
During that time, the sound got
better and better, and the poor sound
of the
mid-high-pitched tone disappears every day by
degrees.
The renewal MM-151S is a little bit less than
previous MM-151S about
sharpness and force.
But the
renewal MM-151S has a rich bass and shiny mid-high-pitched
tone.
The renewal MM-151S plays any music with comfortable
to me.
In particular, vocal and piano music are
excellent.
Eric
Clapton "Unplugged"
At first, PARC Audio
DCU-F131W is less than ALTEC CF204-8A.
However, it has now
became quite high realistic sensation.
I can enjoy
it.
Midori "Encore!"
Chases violin
and piano reverberate with big realistic sensation.
I could
listen to the high-pitched sounds of a violin without
strong
stimulus to my ears.
But I still feel a little
tight to the highest pitch.
Whether it is fate of
full-range speaker driver or whether it gets better
by
aging...
I'm looking forward to it.
Henryk Szeryng / Arthur
Grumiaux
J.S. Bach "The Violin Sonatas" "The
Partitas"
I can only say they are a
great.
The Modern Jazz
Quartet "DJANGO"
Despite the monaural
recording, I could listen to each instrumental
sound
clearly with a superb chases and shiny vibrancy of
vibes
by Milt Jackson.
The feelings are
what I am addicted to.
I couldn't listen to these
musics except Eric Clapton during
the past
5 years.
Nevertheless, ALTEC CF204-8A delighted me
with piano trio and
vocal music, etc.
A forceful and a
sharp tone of CF204-8A was appealing to me.
By the way,
PARC Audio DCU-F131W is a good speaker driver
as I
expected.
I'm glad I decided to replace ALTEC CF204-8A with
PARC Audio
DCU-F131W.
I want to spend the time
with MM-151S for years to come.
MM-151S:
190(W)X450(H)X250(D)mm |
Mr.S, Osaka Pref.
March
2009 |
I'm
S, a resident of Osaka.
Thank you for all your trouble when
purchasing SSC coated MM-141S
and the
Corian boards.
Is PIONEER PE-101A all right?
At
first, I worried about it because the
midrange didn't have the
thickness worryingly.
Now,
it has been 1.5 months, the sound came out at a relaxed
state. |
SSC coated MM-141S
with PIONEER PE-101A
|
After a sound begins to come out, the
sound from PIONEER PE-101A
has become stronger.
It
plundered MM-141S of the characteristics of Backloaded
Horn
system.
For MM-141S, I should have chosen 8cm
speaker driver.
But PE-101A (10cm) is my choice, I have no
regrets because of
good looks.
They don't have the bass
like a rumbling of the earth, but it has
amazing sound for
10cm driver.
I feel comfortable enough with a
reasonable echo sound.
I enjoy brisk sound like
full-range speaker driver.
I put an accompanying
needle felt by half into the air chamber.
And also, I
put Tozawa styled resonaters in
accordance with your
advice. |
Tozawa
styled resonaters
|
I began trial listening in series.
Doctor 3 "Jazzitaliano
live2007"
Keith Jarrett
"Yesterdays"
Sound spread and sound echo are great.
And
it has very realistic sensation, too.
It makes me think
that the speaker was born to listen to jazz.
Live
instrument is so real, and it has a voluminous
bass.
Laura Fygi "The Very
Best"
It played her vocal voluptuously.
During singing,
I was amazed by the sound of the saxophone.
I heard it like
the player is performing in front of me.
I listened to the various sources without a break from
comfortable sound.
Emi Hayakawa "You and Me and
Jazz"
Eden Atwood "Waves The
Bossa Nova Session"
and all
that.
I felt no strength in classical
music as is to be expected.
But I got sleepy while
listning by echo sound of live instrument.
That's good,
too.
Kumi Koda
"TRICK"
When I first assembled, it was underscored with
bass and the singing
voice was hiding.
It was
intolerable sound.
Now the singing voice comes out forward
and the balance had
improved.
But this kind of music
doesn't suit it.
Of course it can play some of J-pop with a
refreshed feeling.
Finally, I listened to much-loved The
Beatles.
I could listen to it at full.
I felt vividly even the recording of the 60's, and more
listenable it than Kumi Koda
"TRICK". Usually, I use SONY multichannel integrated
amplifier TA-DA3200ES. But Victor 2-way bass reflex speaker
system SX-M3 drives by marantz integrated amplifier PM8003.
I contrasted with PM8003 once. I felt the difference
between the characteristics of both amplifiers, but
surprisingly, voluminous sound is not so different. I
thought big differences occur in the sound. If
anything, the tone color of marantz with a sound
spread and echo suits my SSC coated
MM-141S better. I studied product reviews
carefully before buying with an open mind. My mouth
splits open with better-than-expected results. That's
low-skew high-resolution sound, and I could feel
centering localization, too. Under such condition, it
has a sound spread and echo.
The sound soothes listeners.
It still makes full use of the abilities because I'm
just getting started. But surprisingly, they balance
MM-141S with PIONEER PE-101A.
MM-141S:
160(W)X450(H)X250(D)mm |
Mr.Ishikawa, Iwate Pref.
March
2009 |
I
know you're busy.
I fell in love with Monacor SPH-30X at
first sight, and imported.
I reworked MDF baffle boards
before the arrival of SPH-30X.
I mounted it on MM-151S,
it was baseless lightweight sound.
MM-151S may have been
oversized box for Monacor SPH-30X.
But I could feel the
good origin of SPH-30X.
I listened to some CDs. I heard the
shiny tone of the high-tone range such as a vocal, a
piano,
a violin and cymbals.
The problem is a bass
tone.
I believe it needs an aging in megavolume.
So,
I carried the MM-151S to a coffee shop, and bring our
friends
round and have a preview of the MM-151S.
On the
previous day, I aged the MM-151S at full blast for about
an
hour with a shop proprietor.
Then, a bass tone
came out as hard as it is to believe.
Our friends will be
surprised at just a 7cm speaker driver. |
The preview of MM-151S with Monacor
SPH-30X
|
We held a preview
of Hasehiro Backloaded Horn Speaker over 4 hours.
We
listened the sound of Monacor SPH-30X and CSS FR125S
by
MM-151S.
Monacor
SPH-30X
It brings unusual shiny tone, regardless of the audio
source when
listening to solo music.
It is springy and
shining tone with clear-cut sound.
Is it Kevlar cone
sound?
We listened raptly to the shiny tone for the initial
period of time, but
the shiny tone stands out by
degrees.
Listening to symphony, it loses texture of a
dynamic playing part of
brass section and female chorus
when treble part is coming.
It needs an aging more.
But
the diaphragm of Monacor SPH-30X was terrific
motion.
CSS FR125S
We,
all five gave it a loud ovation.
FR125S was
absolutely magnificent.
Usually, the shop proprietor
listens to the sound of JBL 4344II
(see a photo), and he
praised to the skies.
MM-151S:
190(W)X450(H)X250(D)mm |
Mr.K, Osaka City
December
2008 |
I had been using CORAL BETA-8
on MM-191T.
But I damaged a voice coil of BETA-8
through my own carelessness.
So, I thought I take this
opportunity to replace BETA-8 with
another driver.
I
considered some drivers such as LOWTHER, Electro-Voice
and
FOSTEX, but I want to attempt at novelty like a car
stereo speaker.
Eventually, I bought KEF flush-mount
speaker for home theater
Ci160.2QR, and mounted it on
MM-191T.
It is coaxial 2-way speaker (16cm). MM-191T places
a plentiful load
through the long exponential curved horn,
so it plays music with
a deep tone. Contrabass and
pipe organ are great.
I report this as unforeseen
example.
MM-191T:
310(W)X900(H)X450(D)mm |
MM-191T with KEF
Ci160.2QR
|
Mr.Kurotani, Shizuoka Pref.
October
2008 |
|
I built a tube
amplifier VP-3488SE (pictured right) in August,
and I was
listening to music on a 2-way (38cm and horn) large
system
in my listening room.
I was absolutely-fascinated
with the sound of a tube amp.
I want to hear the sound in
the living room all the time.
There are
self-produced zelkova-made 20cm coaxial 2-way
speakers
(pictured center) in my living room.
I was
satisfied almost flat sound of 50Hz to 20kHz, but I learned
of
Hasehiro backloaded horn speakers on the Internet and
want to buy. |
MM-161T
with JORDAN JX92S
|
I was surprised.
MM-161T with
JORDAN JX92S is almost the same low tone as
38cm
driver.
MM-161T makes unbelievable low tone, it's
only 12cm driver.
Recently, I built the 2nd tube amplifier
10W+10W (pictured left).
It can also drive MM-161T with
JORDAN JX92S.
MM-161T:
220(W)X900(H)X450(D)mm |
Mr.Mochizuki, Shiga Pref.
September
2008 |
|
e-mail from him
A month have
passed since I started listening the sound of MM-191T
with
FOSTEX FE208ES-R.
I tested repeatedly, either increased or
decreased the sound absorbing
materials and the
resonators.
Nevertheless, the undertone is not like
what I expected.
It play only a weak sound.
I
want to play the heavy deep sound.
I'd like to know about
the relationship between the sound and the
sound
absorbing materials or the paint application.
Please advise
me.
e-mail to
him
FOSTEX FE208ES-R is great driver in
terms of resolution and sense
of speed because of low
Qo.
But I think it has trouble with the heavy deep
sound.
If you paint them with SSC compound,
the undertone become strong
with bright clarity.
But it
will become poor performance in the present condition if
you
paint them.
I'd
suggest that you increase the capacity of the air chambers by
our
upgrading parts.
Please
remove one MDF boards from one MM-191T, and add its
MDF
bords into other MM-191T on trial.
In that case, the
fastening screws can't reach the opposite side.
So, please
tape temporarily with adhesive tape.
The width of the front
baffle board is short, too.
So, please put in a piece of
wood into the space between
the front
baffle and the side baffle
board.
Please preview the sound in only one side.
If
it still give a poor sound, please replace FOSTEX FE208ES-R
by
FE206E or F200A.
Please let me know if you make
status of progress.
e-mail from
him
I received the upgrading parts to
MM-1111T. (2-grade increase)
I brought the front baffle
boards to a do-it-yourself home center, and I
had the pilot
holes drilled. (@JPY21x16)
They need only a little
sound absorbing materials.
Grew in the range, the sound
became mellow and improved the
efficiency.
The low pitch
sound comes along for the ride with a piano, a guitar and a
voice without equalizer correction because the
mid-low pitch sound
near hundreds of hertz has
momentum.
Separated sound (left, center, right)
gathered in the center.
Everything became better than
before.
I'll paint them in this
autumn.
MM-191T:
310(W)X900(H)X450(D)mm
MM-1111T:
370(W)X900(H)X450(D)mm |
Mr.K, Kanagawa Pref.
September
2008 |
|
One year has
passed since I bought MM-191T.
MM-191T plays with
perfect harmony when I mount Japanese driver
such as FOSTEX
F200A.
But when I mount LOWTHER PM6A, it doesn't play with
perfect
harmony.
It makes a slip of the sound.
In
other words, it has a light sound.
I made all
kinds of efforts, for example, I got the horn longer than
the
original by increasing the divider plates.
But I
couldn't do anything about it.
I was almost ready to give up, but I remounted the
baffle boards with LOWTHER PM6A upside down from sudden
random thought. To my surprise, it took an adequate load
and became well-balanced natural sound. It's so small a
matter. Now I am intoxicated with an
electrifying sound of LOWTHER PM6A. The other drivers
don't have a next chance anymore.
People have different tastes in sound, and it varies
according to
conditions.
But I thought this is one way
to take advantage of LOWTHER PM6A.
So, I reported this as
an audiophile.
MM-191T:
310(W)X900(H)X450(D)mm |
Mr.Ono, Gunma
Pref.
July 2008 |
|
Today I
received the front baffle boards for PARC Audio
DCU-F121W
(10cm).
And now, I am enjoying the sound of the new
MM-141S.
I enjoyed the sound of DIY Audio SA/F80AMG
(8cm) with MM-141S
for 2 years, but I wanted to
change the diameter of drivers for
MM-141S when I listen to
the sound of MM-131SS (8cm).
I thought MM-141S is a little
small to DCU-F121W, but it was not bad sound.
I'm
looking forward to an acoustic tuning of self-satisfaction,
while
aging DCU-F121W.
A complete different speaker with
just purchase additional front baffle boards, and it can also
change back to the original drivers.
I find your
revolutionary breakthrough quite impressive.
Thank you
for your MM backloaded horn.
MM-141S:
160(W)X450(H)X250(D)mm |
Mr.I, Hokkaido
February
2008 |
|
(He mounted
ALTEC 755E on MM-191T.)
It has been 10 days since
I bought MM-191.
I'm running out of adjectives to describe,
that's high-quality sound.
I felt both surprise and
sensation because I've underestimated the
full-range
speaker driver.
Usually, I listen to jazz and baroque
music.
I get involved in a realistic sound and forget the
passage of time.
I really appreciate to meet a good
things.
It didn't take much time for me to assemble the
MM-191T.
I thought the buyer should make the pilot
holes for insertion of bolts in
the baffle board before
assembling as noted in the detailed
assembly
illustration.
That's a point well taken because
of hard MDF board.
I retightened the screws on several
occasions from the very beginning.
To my surprise,
obviously,
the sound quality has improved each time and
every day.
MM-191T:
310(W)X900(H)X450(D)mm |
MM-191T
with ALTEC 755E
|
Mr.Ito, Saitama
Pref.
November 2006 |
|
(He purchased
MM-161 for subwoofer box.)
Thank you for your
arrangement for MM-161 for subwoofer box and
SCAN-SPEAK
15W8831G00 midwoofer.
I will report on the present
situation in the subwoofer.
I made a channel divider
(-24dB/oct) based on electronic circuit
diagram on the
Internet, and I set up the system for 2.1ch.
Under my
plan, I was supposed to paint the SSC compound and
bond
with two-component adhesive in one sitting.
But
when I purchased MM-161, the six-ply full width was
182mm
because of steamy summer.
Today, it is about
178mm, so I can do the work but I don't have
enough
time.
And I have a problem in selecting the cutoff
frequency.
It seemed like it creates the peak value around
at 100Hz because my
acoustic tuning such as sound absorbing
materials is not well yet.
So I have set the cutoff at
80Hz now.
Thus my own subwoofer remains in a state
of trial fitting.
But it has a powerful effect on my
sound.
When I only play the MM-161 subwoofer, I don't get a
word of what it
is playing.
However, naturally it lends
weight to the musical composition.
I can feel its trend
even weak bassy source such as guitar solo.
Now, I use
SCAN-SPEAK 15W8831G00 within a narrow range.
That's a audio
life of luxury or a waste...
MM-161:
220(W)X450(H)X410(D)mm |
Mr.Tsuda, Aichi Pref.
November
2006 |
The present my system is MM-161 with Tang Band
W4-657SC after all
sorts of troubles and
difficulties.
Firstly, I bought MM-151 for 10cm drivers
from you.
Speaker drivers were for backloaded system
made by FOSTEX.
But the speaker drivers needed MM-161 for
12cm drivers.
I ordered MM-151 by mistake due to a lack of
attention.
I hurriedly bought the upgrade parts to
MM-161 from you and
assembled.
But the sound
was the worst.
I thought that whatever I tried, nothing was
going to my favorite
sound.
I have got Tang Band
W4-657SC on hand.
So I changed the speaker drivers to
Tang Band W4-657SC.
It became refreshing sound without
stimulating tone.
I felt motivated, so besides I bought the
upgrade parts to MM-171 for 16cm drivers from you.
I have
got 16cm drivers on hand, too.
I assembled that, but
it didn't fit with backloaded system.
Thereupon I've
been thinking of paint the enclosures.
I have got the
impregnating coating material for wood deck on hand.
So I
painted the whole surface with it.
I spent over 2 liters of
the coating material for 2 enclosures.
I dried them in a
week or so.
And I overcoated the outside and the horn
with acrylic paint three
times, and assembled as MM-161
(with Tang Band W4-657SC).
MDF became so firm and the
sound, too.
It changed to a fantastic loudspeaker
system. |
MM-161 with Tang Band W4-657SC and TAKET
BATPRO
|
|
Moreover, I
became curious about the backloaded sound by
8cm
speaker driver.
I decided to buy Tang Band W3-1231SH
titanium drivers.
And I ordered SSC coated baffle boards, Tozawa
styled resonaters,
etc.
to you.
I disassembled the enclosures for 12cm drivers
(MM-161) and
reassembled them for 8cm
drivers.
Eventually, I got all parts MM-141 for 8cm drivers
to MM-171 for 16cm
drivers.
What the hell am I
doing?
Tang Band W3-1231SH titanium cone drivers were
dynamic sound, but
I felt that the scale and the high-tone
range were not enough.
Now I reassembled them to the
first MM-161 with Tozawa styled
resonaters and Tang Band
W4-657SC.
And I have added TAKET BATPRO as the super
tweeter.
I listen to music with the super woofer depending
on the music.
It play the great sound from pops to baroque
music.
Karen Carpenter sings songs to me
vividly.
Recently, I don't use much YAMAHA NS-1000M
and B&W N805.
Tang Band W4-657SC aluminum cone
drivers are refreshing sound.
I want to use the
contrasting ALTEC speaker driver.
So I ordered the front
baffle boards for it to you.
I really appreciate that you
devised the unique system of MM
series.
MM-161:
220(W)X450(H)X410(D)mm |
|
Mr.Nakamura, Tokushima
Pref.
February 2003 |
|
(citation)
Unfortunately, I cannot enjoy
music at full blast.
So, I was looking for enjoyable
speaker even lower the volume.
My concern for low
volume was that it become poor sound
by weak
bass.
And it is blunt or coreless sound if
it is voluminous sound.
(many large woofers like
that.)
I chose 4 drivers from 10 to 16cm, Technics
EAS-16F10, FOSTEX
FE108ESII, ELCY Electric LC-12S and
Electro-Voice.
And I purchased MM-161T.
I was
right!
I was so impressed that unclouded, backboned,
voluminous and sharp
bass came out from MM-161T.
It
seems like only the good points of the back loaded horn
system.
Previously, I have been using the back loaded horn
speakers D-37
designed by Mr.Tetsuo Nagaoka.
But D-37
couldn't give full play to the ability when low
volume.
So, D-37 didn't meet my living conditions.
I
think MM series is great because they have good-quality bass
even
low volume.
From the start, I adhered
6 MDF boards with school glue.
I changed the
internal wiring from associated cords to JBL speaker
cords,
and eventually it was decided CARDAS cords.
Eventually,
ELCY Electric LC-12S was the best to me among 4
drivers.
But the top notes of high-tone range don't come
out from LC-12S with
MM-161T, so it needs tweeters.
It
is usually the voluminous of mid-low-tone and low-tone
range.
I am hoping to increase the voluminous, so I will
increase the number
of its driver to 2 per channel.
The
hardness of the mid-low-tone range is like JBL 4"
driver.
Am I very much
flattered...?
MM-161T:
220(W)X900(H)X450(D)mm |
| August 2005 |
|
|
(citation)
I was using ELCY Electric
LC-12S with MM-161T.
I upgraded its MM-161T to
MM-191T to increase the number of its
drivers to 2
units per a channel.
I mounted two LC-12S up and down, it
was great!
It played hard sound with a soft laid-back bass
by different blowback in
the 2 drivers.
But I still
was discontented with the bass.
So, I mounted 20cm
drivers on MM-191T.
However, I sounded like capacity
shortage of the air chambers.
At last, I upgraded its
MM-191T to MM-2122T.
I was listening to music by its
MM-2122T with FOSTEX FE208E°,
JBL D208, Technics EAS-20F100
and ALTEC CD408-8A.
I enjoyed music by ALTEC CD408-8A
with MM-2122T, but I had a
particular concern to slackness
of around 1kHz. (female vocal or violin)
So, I mounted
ALTEC CF404-8A on the rear open boxes and I
added
them without crossover network.
I listened to
music without change nearly a year.
But I started worrying
about the bass volume.
And so I changed to Jensen P10Q
drivers (25cm).
I don't know the brand, but it is alnico
magnet.
The frame is pressed steal and the edge remains
cone paper.
Originally, it was real dog. Bass was good, but
high note didn't grow.
The gamut was cloudy and somber
sound.
But it was very sharp sound, and the rising
time was much faster than
ALTEC.
It played only the
guitar.
It was dismal.
My money went up in smoke...
I
should have bought Celetion
drivers...
After 3 months, I said "what a
relief..."
It just took longer than I expected to the
aging.
Even now, sensitive sound of the mid-high note is
sluggish.
So, I adds ALTEC
CF404-8A.
MM-191T:
310(W)X900(H)X450(D)mm
MM-2122T:
440(W)X900(H)X450(D)mm |
| September 2006 |
|
(citation)
I used Jensen P10Q for 5
months.
Voluminous bass and sharp sound were utterly
fascinating.
But I threw my hands up due to
insufficient sensitive sound.
Therefore, I looked for a
new driver under the following conditions.
1. 20 or
25cm.
2. Superior expressiveness of tone color.
3. Fine
high-mid note, bass and full band even a single
full-range
speaker.
Specifically, high-mid note has a
sensitive expressiveness.
4. Dynamic sharp sound in the
gamut.
FOSTEX FE206E
High note reaches
to breaking point without stress (power of
subcone),
and bass is OK.
I didn't like the driver first
because of ugly subcone appearance.
Sound is well that ends
well.
Now, it seems like a pretty face.
But I sound weak
and boring sound if its motion is less active.
So, I think
a large air chamber is better to the driver to make its
load
lighter.
I cannot expand the width of MM-2122T
anymore.
So, I piled the other baffle board on top of the
present front baffle
board. (two-ply front baffle
boards)
Audio Nirvana 8"
That's a wonderful
driver.
The magnet is larger than FE206E magnet, and it is
very sharp sound.
MM-2122T began to play with pleasure the
sound of wind instrument.
It may be the best driver among
20cm drivers.
But it is necessary to do that the capacity
of the air chamber is larger
than using FE206E.
So, I
removed the sound absorbing materials from the air chamber.
Even so, it is my favorite sound ever.
Three-ply
front baffle boards...?
MM-2122T special:
440(W)X900(H)X480(D)mm |
Mr.S, Toyama Pref.
July
2006 |
Sachsenwerk has four different models in the
marketplace.
Two are full-range speakers, one is 20cm
field speaker and the other
is 22cm use of ferrite
magnet.
The other two are 13cm tweeters, one is use
of alnico magnet and the
other is use of ferrite
magnet.
All of them are vintage speakers of the 1940's and the
1950's, and carried by the premium tube radio
"Olympia".
The most famous driver is 20cm field full-range
speaker, and many people say the speaker system with 2 or 3 of
the driver per channel is
the greatest in all of the
speaker systems. I purchased 14 of the driver from the
German city of Dresden at my
friend's request.
My friend
picked over drivers from them because they have
an
individual difference.
It was deeply-moving tone
for him, so he would try to make the system using
the 3 drivers per channel this summer.
Field speaker
needs DC power supply for its electric magnet.
So it's too
much of a bother.
But some day I want to listen to the
sound on WCW or MM Backloaded
Horn System.
I got hold of
2 of Sachsenwerk 22cm full-range speakers using
ferrite
magnet, and it is decidedly
rare speaker compared to Sachsenwerk
20cm field
speaker.
The sound makes my heart melt even it plays
naked. |
MM-161T with CORAL 6CX-501
and Sachsenwerk
|
MM-161T mounts CORAL coaxial 2-way speaker
6CX-501, but I
removed the wire connection to the
tweeter.
Instead, I use Sachsenwerk 13cm cone tweeter
across a capacitor
of 3ΚF.
I exchanged the advantage of
point sound source of the coaxial
full-range speaker
driver.
This was because I get the most wonderful, the
world's greatest and
one and only mid-high Sachsenwerk
13cm tweeter to sing.
The mid-low range of CORAL
6CX-501 and the MM Backloaded Horn
Sound are
excellent.
I also impregnated the baffle board for
Sachsenwerk tweeter with
SSC
compound, and it had great effect, too.
It smells agreeably of a sense of reality and depth, a
stereoscopic
effect, a persuasive power and the
luster.
But the sound forces nothing on the listener.
It has a
sense of tension but doesn't give tone to me.
I think this is the effect of a high-quality bass tone
from Hasehiro
Backloaded Horn.
The most distinctive
feature of MM Backloaded Horn Enclosure is
that the
owners can easily enjoy many sounds by replacement
of the baffle board.
And it brings a lot of enjoyment to me
if its driver is not designed to the
Backloaded Horn
System.
My MM-161T went through a transition, it began with
ELCY Electric
LC-12S and my next selection was FOSTEX
F120A.
Now it's CORAL 6CX-501 but I make arrangements try some
drivers.
They are German vintage alnico drivers of the
1950's;
SIEMENS Klangfilm 6 Ruf lsp 13g, TELEFUNKEN, EPW
NEURUPPIN,
Stern-Radio and EGW.
I will play them
with Sachsenwerk mid-high tweeter.
Back then, they made
with high efficiency, so they are meant for
vacuum-tube
amplifier.
MM-161T:
220(W)X900(H)X450(D)mm |
|
| August
2006 |
|
|
(citation)
I
really felt I had to write.
I mounted SIEMENS Klangfilm
6 Ruf lsp 13g on MM-161T.
The drivers are medium-term
models with VAC alnico magnets and
orange labels.
They
are medium-term models, but they were produced in
transition
from excitation to permanent magnet model in the
early 1950s.
At the time, they mounted on tube
radio.
DCR is about 6Ά, the efficiency is very
high.
Sufficiently-strong alnico magnet, infinitely-thin
lightweight cone paper
and aged deterioration-free
edge.
That's full-range speaker driver for tube
radio. |
SIEMENS
Klangfilm full-range 6 Ruf lsp 13g
|
I mounted them on the SSC coated front baffle
boards.
At first, I
uncoupled the mid-high connection of Sachsenwerk
and
heard the sound a little.
I connected its
mid-high connection and switched the capacitor to
2ΚF
for the lack of the upper side.
Oh!
Great!
I felt perfectly natural to
connection with Sachsenwerk tweeters.
Buoyant
good-quality low pitch sound.
Highly concentrated sleek and
rich midrange.
I can feel an air from Sachsenwerk
on the high-tone range.
My compliments.
There's no end
of melody and dynamism.
I am swayed by the
sound.
It took 1.5 years of twists and turns to
provide an adequate selection
of quality SIEMENS
Klangfilm.
Experience shows that German vintage speaker
must not mount on
any box.
It doesn't fully display the
positive attributes even open back enclosure.
It
exert its potential to the full extent at plane
baffle.
German vintage speaker is vibrating system, so it
has blowback in
extreme detestation.
But German
SIEMENS Klangfilm doesn't have a problem to Hasehiro
MM
series (MM-161T).
Hasehiro MM series has unlimited
potential.
MM-161T:
220(W)X900(H)X450(D)mm |
|
|
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