DYNAUDIO Special Forty 40 Anniversary Gloss Grey Birch-veneer monitor Speakers

Description

DYNAUDIO Special Forty 40th-Anniversary Black-Vine-finish
Speakers

PREOWNED – FULLY TESTED – GLOSS GREY BIRCH VENEER – PRICED PER PAIR – INCLUDES ORIGINAL BOX/PACKING, MANUAL, GRILLES, PORT PLUGS, TWEETER COVERS FOR TRANSPORT

 

Special Forty

Cutting-edge acoustic technology in a classic Dynaudio
design
The Special Forty anniversary speaker draws on 40 years of
cutting-edge research – and brings it totally up to date with Dynaudio’s most
celebrated techniques and technologies.
Laurels aren’t for resting on
We still surprise ourselves. Some people might be content to
sit back and be complacent about their successes after 40 years of constant
innovation. We aren’t. In fact, we only get hungrier for new techniques and
technologies.
That’s why we developed the Special Forty: we wanted to
revisit those innovations and see what we’d do differently this time.
What you won’t find here is anything revolutionary. Instead,
you’ll discover a look at our past – along with some special sneak-previews of
the future.
The Special Forty is classic Dynaudio: all the
craftsmanship, attention to detail and total love of authentic sound you’ve
come to expect. It’s the connoisseur’s choice – a simple pair of passive hi-fi
speakers. But it isn’t about looking back, misty-eyed, at past glories and
leaving it at that. It’s about using those glories as a platform from which to
launch our next set of breakthroughs.
Greatest hits… reimagined
We do compact speakers really well. We always have. So, as
a nod back to classics including the Special One, the Special Twenty-Five, the
Crafft and the Contour 1.3SE, we kept the Special Forty pure – if incredibly
advanced.
Of course, it wouldn’t be an anniversary speaker if it
didn’t include some of our greatest hits. But we haven’t just got the old band
back together to trot out the same old stuff, unchanged. We’ve remixed,
remastered and rearranged things to bring those old favourites into 2017 – and
beyond.
That’s why it has one of our classic first-order
crossover designs, incorporating our unique Phase Alignment and Impedance
Alignment technologies. The crossover expertly marshals the input signal
between the woofer and the tweeter – so each driver gets only the frequencies
it’s supposed to, and can perform at its very best. Its specially selected
components handle the impedance optimisation and, because both drivers have
extended frequency ranges for even better overlap and integration, that
performance borders on the mesmerising.
The song remains the same
The Special Forty uses our proprietary MSP (Magnesium Silicate
Polymer) material for its main driver. MSP delivers precisely the right
combination of rigidity, damping and stability for the most faithful sound
reproduction. And, unlike other cone materials, it doesn’t change over time –
so your Special Forty speakers will still be singing just as sweetly come our
next anniversary.
The cone itself uses a painstakingly developed symmetrical
excursion for even better midrange performance. Behind it sits our asymmetrical
spider – our passive harmonic rectifier. It minimises upper harmonics to
further tighten the performance and make it possible not only to pick out
individual parts in a piece of music, but even individual instruments in an
orchestra. (So now, finally, the Third Violin section can have its day in the
sun.) And, like all our other MSP cones, it’s a one-piece design (you can tell
by the special balance ribs around the central dust-cap). This gives it an
incredibly solid connection to the voice-coil, as well as stabilising its form
– which is crucial when you decide to turn it up to 11.
It all sits in our special AirFlow Basket – the bit that
holds the whole driver motor securely in place in the cabinet. Its development
was one of those ‘Eureka!’ moments our engineers seem to get a few times a week
in Dynaudio Labs (you can often hear them cheering from across the road in our
factory). We asked them to reduce internal reflections and increase air
movement without compromising the basket’s stiffness or stability, and this
genius design is what they came up with.
Airflow is king
The new Esotar Forty tweeter takes air-movement to another level. It moves
the air in typically sweet fashion in front of the DSR (Dynaudio Secret Recipe)
precision-coated soft-dome, of course, but there’s a lot of engineering going
on behind it as well.
Take the new pressure conduit. It’s a shaped vent in the
back of the hybrid magnet system that allows more space in the rear chamber.
That space lets us pack in more damping material and reduces back-pressure,
while the shape itself optimises airflow coming backwards from the rear of the
dome.
Then there’s the outlet; the aero-coupled pressure-release
system. It sits underneath the voice-coil and reduces unwanted pressure
build-up that could affect its movement. Stopping those pockets of air from
forming reduces resonance – and less resonance equals even greater potential
for detail.
Flux optimisation and beam control
We love playing with the laws of physics. Physics wins in the end, of
course (usually), but we almost always manage to bend it to our will along the
way. Just like we have with our magnet systems.
The magnet turns electrical energy that flows from your
amplifier into the voice-coil, into the physical back-and-forth movement of the
driver diaphragm. These movements are very small and very fast (especially in
the tweeter), so they need a lot of finesse if you want to hear all that
luscious detail and emotion in your music.
Behind the woofer
In the woofer, we’ve achieved that finesse in two ways: by placing the
magnet inside the voice-coil, and by playing with magnetic energy itself.
Other manufacturers typically put it around the outside
edge, leaving the voice-coil hollow. Putting the magnet inside keeps the
magnetic energy (or flux) in the optimum position for getting itself wrapped
around the voice-coil – where it should be. That means we can use more of its
power for a given weight. It also reduces internal reflections because there’s
less material for sound to bounce off inside the driver.
Second, we use a hybrid magnet for even greater control over
the flux and voice-coil movement. An incredibly powerful neodymium rare-earth
magnet provides the muscle and flings flux around with abandon, while a ferrite
magnet tempers that enthusiasm by gently moving the flux back to exactly where
it’s needed most. The result? Symmetrical excursion, a reduction in
second-harmonics, and an even more accurate, authentic sound.
2020 finish update
Dynaudio’s award-winning anniversary speaker, Special Forty,
has been given a makeover with two stunning new finishes. Black Vine is a
striking contrast of dark veneer shot through with vivid orange, while Ebony
Wave is a captivatingly sinuous take on the classic hardwood.
Both veneers are man-made to Dynaudio’s specs, ensuring
total consistency between pairs of speakers. And the level of finish possible
is simply astonishing – they look as smooth as glass, and as lustrous as a
piece of luxury antique furniture. Just as you’d expect from a nation of
design-fanatics.
Product highlights

• Esotar
  Forty

The new Esotar Forty tweeter maximises airflow for even more
refinement, while its low resonant frequency smooths the
transition to the woofer

• 17cm
  woofer

Our best 17cm woofer yet. It’s based on what you’ll
find in the Confidence and Evidence ranges, and uses a sophisticated hybrid
magnet system for lower distortion and higher power.

• First-order
  crossover

Phase Alignment and Impedance Alignment technologies
keep this classic Dynaudio crossover topology firmly on top of its
game.

• Special
  finishes

The Special Forty’s exclusive Black Vine finish is a
striking contrast of dark veneer shot through with vivid orange, while Ebony
Wave is a captivatingly sinuous take on the classic hardwood. Both finishes are
as striking as they are beautiful – and are unique to each speaker.

Features
Cutting-edge acoustic technology in a classic Dynaudio
design

• The
  Esotar Forty tweeter

This DSR precision-coated 28mm soft-dome tweeter is unique
to the Special Forty.

• Our
  best 17cm woofer yet

The ultimate incarnation of our legendary 17W75 MSP woofer,
with an AirFlow Basket and hybrid magnet system.

• Classic
  Dynaudio crossover

This is a variant of the first-order crossover used in our
other classic two-way speakers – and its performance borders on the
mesmerising.

• Special
  finishes

Black Vine / Ebony Wave? Either way, your eyes are in for a
treat.

• Aluminium
  terminal plate

Five-way binding posts and the 40th anniversary logo: we
care for the bits you don’t see too much, too.

• Made
  in Denmark

Designed and engineered in Dynaudio Labs, and built across
the road in our factory… all in Skanderborg.
Technical specifications

Specification sheet for Special Forty part 2
Sensitivity:	86dB (2.83V / 1m)
IEC power handling:	200W
Impedance:	6 Ohms
Frequency response (±3dB):	41Hz – 23kHz
Box principle:	Bass-reflex rear ported
Crossover:	2-way
Crossover frequency:	2000Hz

 

Specification sheet for Special Forty part 1
Crossover typology:	1st order
Woofer:	17cm MSP cone
Tweeter:	28mm Esotar Forty
Weight:	8.1kg / 17.9lb
Dimensions (WxHxD):	198 x 360 x 307mm / 7.8 x 14.2 x 12.1in
Dimensions with feet/grille (WxHxD):	198 x 360 x 322mm / 7.8 x 14.2 x 12.7in