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Stones # RAAL_70-10
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PDF Brochure
(1000 KB)
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RAAL 70-10D RAAL Ribbon
Tweeter (with optional Amorphous Core)
True ribbon drivers are well known by
their ability of exceptionally fine rendering of the
details in music material.
.jpg) They
work in a different way than conventional dome or
ring HF driver, relieved of all the excess baggage,
so to speak, and they do their job better than
anything else, regardless of the price tag. No
domes, rings, suspensions, coil formers, glues,
damping material, not even the lacquer insulation on
the wire of the coil. No heavy plastic carrier
foils, like in cheap quasi-ribbons. Only 0.004 mm
(0.00016 in.) thick aluminum foil, immersed in
strong magnetic field. It serves as all the moving
parts mention above.
Tremendous acceleration of air is available with
RAAL 70-10, more than 13000 G, and in less than 200
microseconds after, that air is stopped. That brutal
controlling force combined with the smoothest
response available and bandwidth of 100 kHz, can
ensure you that the weak link in any system equipped
with it, will not be the HF driver.
It will show the differences between the electronics
or cables without any effort by the listener. The
better the electronics chain before it, the better
the sound will be. The sound? Well, some people
still can’t believe what they can hear with it, for
the fist time ever, in their well known music
material. That comes as standard with, pretty much,
all true ribbons, but the effortless recreation of
real dynamics, and amazingly high SPL levels for a
ribbon of that size, was not known before RAAL
70-10. It doesn’t get intimidated by the big
amplifiers. If you have clean power, feed it to the
little fellow, and you will be stunned by all the
music you have, presented in another dimension of
reality. If you don’t have power, and/or you don’t
like it, then discover the abundance of detail and
true colour of any instrument played in a brand new,
engaging manner. Yes, the best quality of HF region,
and real, breathing, micro and macro dynamics gives
a totally new sense of what the musician(s) wanted
to say. It will make you forget that the system is
in front of you. The music will come to life.
For measurements, drawings, crossover and more,
please download the PDF datasheet.
FEATURES:
- Special FLATFOIL® pure
Aluminium ribbon
- Special SYMMLEAD® low
inductance signal path
- Special EQUAFIELD® NdFeB
magnetic structure
- Special “non-wave-guide” INOX front plate
- Super-fast settling time
- Flat frequency response
- Low nonlinear distortion
- High signal power handling
- Highest reliability
SPECIFICATIONS:
- Ribbon material: aluminium
- Ribbon dimensions: ( 70 x 9.5 x 0.004 ) mm
- Ribbon mass: 0.0075 g
- Ribbon area: 6.65 cm sq.
- Gap induction ( mean value over gap width): 0.62 T
- Frequency response: 2 kHz ~ 100 kHz
- Sensitivity: 92 dB / 1 m / 2.83 V
- Impedance: 8 Ohm
- Program power handling: 150 W*
- *Recommended crossover: 4th order L-R @ 2800 Hz
This tweeter comes in two models:
standard and with Amorphous Core.
Recently, we finished development of Amorphous
C-cores transformer application in our ribbons. We
are the first to use AMCC's in ribbons for
absolutely uncompressed high power transient
transfer and, at the same time, even further
improving already the best low-level performance in
the world today, by decreasing the width of
hysteresis compared to HF ferrite cores. For direct
coupled tube SE-ribbon, we successfully developed
175:1 ratio, -3dB at 120kHz Amorphous C-core
transformers that can carry DC idle current of SET.
Impedance conversion is about 30000:1, bringing the
0.1 Ohm ribbon up to 3kOhm, good for plate
loading of most triodes in HF
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Audio
professionals about RAAL products and services:
(Provided by the
courtesy of the signers)
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Alexander, your 140-15D is an
amazing tweeter. It is the purest sounding tweeter I
have ever heard. You just hear the music. Thank you
for building such a wonderful loudspeaker. I have
been building custom hi fi and P.A. speakers for
over 35 years and I would have to say your tweeter
is the most drastic step forward in sound
reproduction improvements I have experienced. I am
now redesigning my speakers to include your tweeter.
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Peter Dix
Owner
PDS Pro Audio
Abbotsford, B.C., Canada
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I have never experienced a
tweeter with so consistent and smooth frequency
response measured at 0.28, 1.2 and 2.2 meters. The
next best measurement is Waterfall - the shortest
decay time ever measured.
Thank you, Aleks, for completely engineered product
and excellent workmanship. |
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Wally Malewicz
Owner
WAM Engineering
FlexSpeakers
Hamel, MN, USA |
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Dear Aleksander, after years
of designing and installing monitors and other
equipment in state-of-the-art recording studios,
your 140-15D true ribbon transducers will change the
way I design Speakers. I just installed a system
with the 140-15's in passive 2.5 way mid field
monitors using 2 x Volt BM220.08’s. All I can say is
WOW! Up until now I have only been able to use TAD
or Scan Speak tweeters in studio installs. These
ribbons share the better qualities of the best
dynamic/horn systems with out the power compression
or throat resonance. These things have NO coloration
and are the most transparent drivers I have ever
heard, plus none of the sizzle/distortion that
folded ribbons and planar-magnetics are plagued
with. I must say, I can not believe the clean SPL
these things put out. They easily keep up with the
Volts being driven full power with a 500 watt amp!
Truly amazing! |
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Norman Druce
Owner
Norman Druce Audio
Owosso, MI, USA |
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Mr. Radisavljevic, just wanted
to drop you a line to thank you for making a stellar
product that seriously outperforms its dollar
amount. I immediately noticed the stereo image
improve. This is a stock comment for decent monitors
as far as width is concerned, and I have had this
experience before, but your ribbons improved the
DEPTH of my stereo image! No small feat. I could
hear things that I struggled to place or even hear
in a dense mix in the past. They also revealed some
problems as far as EQ and placement in my mixes.
This is not a phenomenon I am unfamiliar with
happening, but usually, weeks or months after I am
finished with a record, listening on a friend’s
stereo with the distance and perception time and
venue provides. You make a product that not only
sounds great but bends the space-time continuum! All
this and I can listen to them all day with less ear
fatigue. Should you find yourself in Detroit in the
future, I owe you a beer. |
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Chris Koltay
Owner
High Bias Recordings LLC
Detroit. MI, USA |
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Hallo Aleksandar, we would
like to thank you for making those excellent ribbon
tweeters which help to take loudspeaker development
to a new level.
We have to confirm that your creativeness in looking
for improvements in ribbon design and your
exceptional attention to detail as well in design as
in manufacture do not only result in excellent
measurement performance but also in an amazing sound
quality. |
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Rainer Weber & Klaus
Rottenwöhrer
RWA Akustik Systeme
Akustikbau Kaiser
Untergriesbach, Germany |
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Being a long time user of RAAL
ribbons, I have always had considerable problems
which are probably going to keep coming up in the
future. It has been very difficult to find an
adequate partner for them, be it mid-bass or mid
units. More or less, only custom built loudspeakers
can match these extremely demanding ribbons. With
every new project, I face the same time consuming
struggle. It often happens that, while listening to
other systems without RAAL ribbons, I have to ask:
“Excuse me, but are your tweeters working properly?”
These ribbons are not capable of hiding or
diminishing anything at all. You are able to hear
the details from the recording that recording
engineers certainly don’t want you to hear. Way to
go, Alex! Keep revealing the truth to us in the
future! |
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Nenad Napijalo
Founder, President
N.N. Acoustics Engineering
Belgrade, Serbia |
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Dear Mr. Radisavljevic, I
would like to thank you for your outstanding service
and exceptional ribbon drivers. After six years,
developing our line of Studio Monitors, it is your
expertise that allowed us to finally achieve our
goals. Thank you for working so hard and for making
such a difference. I look forward to many future
projects. |
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Danny McKinney
President
Requisite Audio Engineering,
The Standel Amplifier Co.
Los Angeles, CA, USA |
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We have chosen to include the
RAAL ribbon tweeters in our products , due to their
excellent performances . Alexander Radisavljevic is
the new "wonder boy" among ribbon tweeter designers
and is to be compared to the other biggest "stars"
like Dick Sequerra and Alain Benard , no if's , no
but's. |
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Guglielmo Burger
Finaudio /
Aliante
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PataAcustica / CC... /
Caterham Acoustics
Revello, Italia |
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Having had the opportunity to
test many ribbons over the years I find the line
RAAL ribbons to be the best by far. The high level
of engineering that has gone into these units is
immediately heard. The detail and accuracy is truly
amazing. |
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Todd Michael
Head Speaker Designer
Yorkville Sound
Toronto, Canada |
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Hello Aleksandar, I have gone
through about $13000.00 worth of tweeters of all
types in my quest over the last 3-1/2 years. I have
never liked any ribbon that I have tried before. I
have found them to be dynamically constrained
despite what the magazine and the do-it-yourselfers
post. I have also found them to be overly bright and
body-less.
Well I can say that I am going to be using your
140-15D ribbon in my reference speaker design, your
creation is simply fantastic and probably the best
tweeter I have yet to hear. One of the major things
I hated about ribbons was their delicacy, your
ribbon does away with that issue. Congratulations on
doing what seemingly no other manufacturer of ribbon
tweeters has been able to do. |
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Donald Nance Jr.
Tangent Audio LLC
Atlanta, GA, USA |
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Dear Aleksandar, thank you for
the excellent quality tweeter, thank you for the
years and years of experience needed to produce such
really great quality. |
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Majid Jafari
R&D Manager
JTS Pro Audio Group
Tehran, Iran |
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