Dali Helicon Brochure

HELICON

HELICON

TRUE HIGH END

The new Helicon series from DALI presents music
in a way that pays perfect tribute to our motto:
”Magic Moments”. This is no coincidence. Just
looking at the Helicon loudspeakers, your first
guess would be that you are experiencing the
ultimate line from DALI, such is the style and
standard of workmanship. The gently curved
enclosures, so easy on the eyes, and the rich real­wood veneer, lacquered and polished to a high
gloss, spell luxury.

The components and techniques utilized in the
Helicon only confirm this impression. Multi-layer
MDF enclosures, cast chassis drive units, the very
special DALI® Tweeter Module, hand-assembled
and hard-wired crossover networks in separate
compartments and all the techniques and theo­ries developed and finely tuned by DALI over the
years.

Even the name Helicon was not chosen at
random, but carefully selected for its close asso­ciation with the art of music. Helicon is a moun­tain range in Greece occupying a very special
place in ancient Greek mythology. According to
the legends, this is where the patron goddesses
for science and art, the MUSES (hence MUSic),
had their home. There were nine of them, all

daughters of Zeus the god, each representing an
art form or science.
The ”Magic Moments” slogan goes to the core of
DALI’s purpose: the ultimate in music reproduc­tion. The unique principles that DALI incorporates
into each loudspeaker, serve to extract every bit
of information from the source and present it at
its most breathtaking. There is no purpose in
revealing all information if the result is clinical or
analytical. This is why we strive to preserve the
beauty and integrity of the performance, rather
than taking it apart and laying it bare. The differ­ence is striking, and the combination of resolu­tion and exhilaration is difficult to master. The
magic that results is so essential to us. ”Magic
Moments” perfectly describes what we strive to
present to you.

The techniques and design features of the Heli­con range are all of the highest standard.

THE ENCLOSURES

In order to combine rigidity and effective damping
of resonances in the enclosure panels, the core
material is made of several layers of MDF, bonded
together by adhesives under extreme pressure.
This makes the already well-behaved MDF (multi
density fibre) material even more inert and capa-

ble of suppressing resonance. Additionally, inter­nal brace panels are added. The result is a virtual
absence of coloration from the inert surfaces.

The exterior finish of the speakers is stunning,
with polished lacquer enhancing the very elegant
styling and real-wood veneers.

THE HELICON TWEETER MODULE

The DALI® ribbon and soft dome wide dispersion
tweeter module is the most visually striking fea­ture behind the grilles of the Helicon series. In
order to control dispersion and optimise resolu­tion while extending frequency beyond the limit
of human hearing (necessary for new ultra- wide
band-width DVD-Audio and SACD recordings),
we combined a 1" dome tweeter and a super
tweeter ribbon into one aluminium panel tweeter
block. This assures perfect stiffness and excellent
cooling, further aided by Ferro fluid in the voice
coil gap of the dome tweeter. Effectively, these
two units perform as one, offering body and lots
of air at the same time. This module is found in all
Helicon models.

THE NEW CONES

The 6.5” and 8” woofers are custom made for the
Helicon series, with new wood-and-paper fibre

composite cones and dust caps as well as high­acceleration- geometry profile cone shape. DALI
prefers light, stiff cone materials that react with
lightning speed to the signals, but pliable enough
for the inherent sound of the cone material not to
shine through. To achieve this, we have chosen a
new type of paper cone that contains unusually
long wooden fibres in carefully measured propor­tion. The fibres control resonance and permit a
more lightweight cone to be used.
A light coating then controls the few remaining
resonances. The cone curvature is optimised to
effectively transform the impulses from the voice
coil into faithful movements of air.

“LOW LOSS” WOOFER AND MIDRANGE DRIVE
UNITS

“Low loss” means that all parts or assemblies in
the drive units that may impart damping or brak­ing are either re-designed or done away with.
This means that even the tiniest signals are effec­tively converted into acoustic energy instead of
being lost to sluggish mechanics or resistance to
motion.

AMPLIFIER-FRIENDLY

One consequence of adhering to “low-loss” prin­ciples is that the speakers do not mask bad behav-

iour from the amplifier. Many amplifiers react
poorly when facing difficult speaker loads, and
a Helicon speaker would show this very clearly,
because it presents even these minute details so
accurately. In order to avoid this problem, all Heli­con speakers are designed to be benign ampli­fier loads. Amplification of the highest class is an
advantage with the Helicons, but more modest
amplifiers are also suitable.

LINEAR DIRECTIVITY

We have designed the DALI® Linear Directiv­ity principle into Helicon. Sound dispersion is
extremely even, permitting listening even at
extreme off-axis positions, but also resulting
in the speakers being relatively impervious to
changes in room acoustics. In short, they retain
their character even when moved from room to
room. And the sweet-spot effect is not nearly as
pronounced as commonly found, because the
more distant speaker does not suddenly sound
much lower or very different. This means that it is
not necessary to sit exactly in the middle in order
to enjoy a coherent “soundscape”. Unusually, this
is true even for the high treble notes, thanks to
the super tweeter ribbon.

HELICON 400

The Helicon 400 combines the weight and
authority of a true floor-standing loudspeaker
with a svelte, elegant visual appearance. They
function perfectly as either stereo speakers, or
main speakers in a surround system for medium­sized rooms. The Helicon 400 features a 2 ½ way
system with two 6.5” woofer/midrange drivers.
One 6.5” driver handles the lowest frequencies
and the other extends to the Helicon special
tweeter module with its 1” soft dome and ribbon
tweeter. Normally, the narrow front baffle would
result in reduced levels below 500 Hz. However,

the twin woofers share the load below this fre­quency (in effect acting as a single 9” woofer),
reducing woofer excursion by half. Above 500 Hz,
the upper woofer takes over, eliminating phase
problems at shorter wavelengths. Each woofer is
housed in its own chamber with internal bracing
and a flared air-flow reflex port. A separate third
chamber is created solely for crossover network
in order to protect this delicate assembly from
the tremendous sound pressure levels within a
loudspeaker.

HELICON 800

The Helicon 800 is an imposing, floor-stand­ing speaker, capable of massive sound pres­sure levels and powerful, deep bass. The 800
features an extremely strong multi-layer enclo­sure, reinforced with heavy internal bracing,
capable of controlling and suppressing internal
resonances. Helicon 800 is eminently suited
as a stereo speaker or main surround speaker,
primarily for larger rooms. Essentially a three­way system, the 800 utilizes twin 8” woofers,
housed in separate bass reflex chambers, one

6.5” midrange and one special-design Helicon
high frequency module, consisting of a 1” soft
dome tweeter and a ribbon tweeter. The reflex
ports on the back are flared designs to minimize
airflow noise.
The crossover network is situated in a sepa­rate, sealed chamber, protected from vibration
induced by extreme pressure waves inside the
enclosure. The Helicon 800 is eminently linear,
with negligible coloration and capable of sepa­rating the tiniest details in the midst of tempes­tuous sound levels.

HELICON 300

The Helicon 300 is the bookshelf or stand­mount model of the line. It is designed to be
freestanding like the larger models. All aspects
of appearance and construction are identical
to the 400 and 800, but modified for use in
smaller rooms or where a more discreet speaker
is called for. It features a 6.5” woofer/midrange
unit in a reflex enclosure with the special Helicon
tweeter module. The airflow flared reflex port
is placed on the back. The sound is full-bodied
and refined, with real bass extension to below
40 Hz. This deep bass extension renders Heli­con 300 a serious speaker in its own right. The
surprising weight and substance of the 300’s
sound, combined with the highly responsive,
fast-acting low-loss drive units, result in a finely
tuned, immensely detailed stereo speaker. In
surround systems the 300 is perfectly suited as
front speaker, and obviously matches larger Heli­con models as an ideal rear speaker in extremely
large surround systems.

HELICON W200

The W200 is intended as an on-wall suspended
speaker, capable of the same high quality
sound as the other Helicon models. It features
a 6.5” woofer/midrange drive unit and a Helicon
tweeter module. The appearance matches the
rest of the series, with curved side panels. The
front panel is angled 20°, utilizing the wall as an
extension of the front panel. This design ensures
that bass sounds do not disappear rearwards,

but are directed towards the listening position.
The sealed enclosure helps support this purpose,
resulting in a potent, big-sounding speaker,
which doesn’t dominate a room. The W200 is
well suited as a main speaker for stereo and
surround systems. However, the W200 is best
utilized as a rear and side speaker in full-sized
surround systems.

HELICON C200

Helicon C200 is the centre channel speaker of the
series. The C200 is designed to match even the
large Helicon 800, and to handle the formidable
demands of modern movie soundtracks, provid­ing abundant volume and deep bass. The C200
is a powerful centre speaker, featuring twin 6.5”
woofer/midrange drivers housed in separate
bass reflex chambers, and the Helicon special
tweeter module. The horizontal, curved top and
base panels compliment the curved side panels
of the vertical Helicon models. As a special fea­ture, the curve of the base panel fits precisely
into the curved top panel of the Helicon S600

subwoofer. This design allows the C200 to utilize
the S600 as a pedestal, with both horizontal and
pivot adjustments, ensuring perfect alignment to
the listening position.

The Helicon special tweeter module is rotated
90° to maintain its vertical orientation and
ensure wide horizontal dispersion. All drive units
in Helicon C200 are magnetically shielded, per­mitting freedom in location. If positioning the
C200 on top of the S600 subwoofer is not suit­able, it may be placed on a shelf above or below
the video monitor.

HELICON S600

Helicon S600 is the subwoofer of the series. It is
a strikingly elegant subwoofer, equally capable
of serving as a surround subwoofer or to supple­ment a stereo system in the extreme bass. Like
the other Helicon speakers, it is made from solid
laminated panels, veneered and polished to pres­ent the structure and patterns of the wood exqui­sitely. The curved top panel is meant to act as
a cradle for the C200 centre speaker, permitting
the C200 to be rotated into correct listening posi­tion. If no C200 is placed there, the concave top
serves to accentuate the elegance and high class
of the Helicon series. Although it is compact, the
S600 features twin active 12” long-throw sub­woofer drive units, firing sideways and opposed.

The very rigid and lightweight cone material is
easily accelerated by the large double magnets.
The fact that the woofers are opposite each
other and moving in opposite directions means
that there is no resulting force acting upon the
system as a whole, rendering the bass signal
more precise. This also means that a C200 centre
speaker placed on top of the sub is unaffected
by vibration. The enclosure is sealed, like most
DALI subwoofers. This principle eliminates port
chuffing noise and yields optimum pitch, defini­tion and precision. The S600 incorporates active
equalization, which means that the subwoofer
can reproduce extremely low frequencies at the
correct levels. In order to protect the drive units

against unwanted subsonic noise, frequencies
below 20 Hz are filtered out.
The amplifier provides a formidable 300-watts
of power, resulting in a maximum SPL of 117 dB
at 25 Hz.

The complete Helicon series

HELICON 800 HELICON 400 HELICON 300 HELICON W200 HELICON C200 HELICON S600

Cherry RosenutThe complete Helicon series is available in:

Technical Specifications

HELICON 800 HELICON 400 HELICON 300 HELICON C200 HELICON W200 HELICON S600

Main Spea ker Main Spea ker Compact Sp eaker Center Spe aker Wall Speaker Active Subwoof er

Frequency range +/- 3 dB (Hz) 31 - 27.000 31.5 - 27.000 37 - 27.000 Hz 49 - 27.000 41 - 27.000 25 - 175

Crossover frequencies ( Hz) 580 / 3.00 0 / 13.000 (700) / 3.000 / (13.000) 3.400 / 13.000 2.800 / 13.000 3.000 / 13.000 45 - 120

Sensitivity (2.83 V / 1m) 89.5 dB 88.0 dB 86.0 dB 90.0 dB 89.0 dB -

Nominal impedance 4.0 4.0 4.0 4.0 4.0 20 k

Minimum impedance 3.6 3.7 4.3 3.8 4.0 20 k

Maximum SPL 113 dB 111 dB 108 dB 111 dB 108 dB 117 dB

Recommended amp. power 50 - 400 Watt 50 - 300 Watt 50 - 200 Watt 40 - 250 Watt 30 - 150 Watt

Amplifier - - - - - 300 W RMS / 600 W Peak

High frequency drivers 1 x 25 mm soft dome 1 x 25 mm soft dome 1 x 25 mm soft dome 1 x 25 mm sof t dome 1 x 25 mm soft dome
1 x 10 x 55 mm ribbon 1 x 10 x 55 mm ribbon 1 x 10 x 55 mm ribbon 1 x 10 x 55 mm ribbon 1 x 10 x 55 mm ribbon -

Midrange drivers 1 x 6½" - - - - -

Low frequency drivers 2 x 8" 2 x 6½" 1 x 6½" 2 x 6½" 1 x 6½" 2 x 12" long throw

Bass reflex tuning frequency 28.5 Hz 32.0 Hz 34.5 Hz 36.0 Hz - -

Dimensions (HxWxD ) (mm) 1126 x 255 x 493 1026 x 219 x 457 435 x 208 x 356 210 x 650 x 435 452 x 326 x 214 642 x 420 x 415

Dimensions (HxWxD ) (inch)

Weight 40.9 kg (90.1 lb) 31.7 kg (69.7 lb) 9.8 kg (21.6 lb) 18.4 kg (40.5 lb ) 9.5 kg (20.9 lb) 40.0 kg (8 8.1 lb)

Finish High gloss High gloss High gloss High gloss High gloss High gloss
cherry and rosenut cherry and rosenut cherry and rosenut cherry and rosenut cherry and rosenut cherry and rosenut

44.33 x 10.04 x 19.41 40.39 x 8.62 x 17.99 17.13 x 8.19 x 14.02 8.27 x 25.59 x 17.13 17.80 x 12.83 x 8.13 25.28 x 16.54 x 16.34

TRUE HIGH END

MINIMUM PHASE SHIFT

Time coherence is an aspect of the Helicon that
has received meticulous attention, with particu­lar emphasis on the crossover frequencies fraught
with phase problems. Correct resolution of tran­sients and three-dimensional imaging hinges
upon proper phasing. The painstaking efforts
DALI dedicated to this issue have been richly
rewarded. It’s almost possible to walk directly
into the three-dimensional space presented by
the Helicons. There is a very real, tactile sense
to the music.

NO DYNAMIC DISTORTION

The drive units used in the Helicon speakers
are designed for low distortion, not just when
faced with constant sound, but also when han­dling transients. Dynamic distortion is harmful
because it creates non-harmonic by-products,
alien to music and therefore easy to hear. Elimi­nating these by-products dissolves a primary
cause of listening fatigue and “artificial” sound.
Another benefit of low dynamic distortion is that
the Helicons don’t sound loud or stressed, even
at loud volumes. It’s possible to listen “through”
the speakers directly into the music.

EXTREMELY WIDEBAND DRIVE UNITS

In order to achieve superior performance within
each drive unit’s range, the driver must be able
to perform well beyond this envelope. The 6.5”
woofers extend from approx. 30 Hz to more than
three octaves beyond the range demanded by the
crossover network. The Helicon tweeter module
likewise extends far lower than necessary. The
result is effortless, accurate presentation.

CROSSOVER NETWORKS

The crossover network in each Helicon loud­speaker is highly advanced. Helicon crossovers
embody the concept that the driver and the net­work are not separate entities, but an inseparable
whole. The meticulous matching of network and
drive units permit Helicon speakers to provide
impressive three-dimensional imaging. Each DALI
crossover component is selected for maximum
sonic performance, reliability and durability.

All components are positioned to minimize cross­talk, even to the extent that the direction of the
choke windings are considered. All components
are “hard-wired”, eschewing the use of circuit
boards. All component wires are soldered directly

to each other, resulting in the lowest possible
loss. All components are secured to the mount­ing plate by glue and/or screws to eliminate indi­vidual resonances. To further reduce the effects
of vibration, the crossover networks of Helicon
400 and 800 are housed in a separate zero-pres­sure, zero-vibration crossover chamber, removed
from vibrations within the speaker enclosures.

The connecting terminals are heavy-duty gold
plated hardware with plastic sleeves to protect
against shorting. All models are designed for bi­wiring.

BASES

The floor standing models are placed on sturdy
MDF bases, fitted with threaded inserts for spikes
(included). The crossover network is situated in a
separate compartment, supported by the base.

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