SpiraTech
Series •
AR-208
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2-Way,
Line Array unit
Mid Power and High Directivity
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Applications
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This powerful and highly modular system offers great directivity and flexibility. Therefore it can be used to sound small events up from one thousand listeners to
large concerts in open spaces. It meets the standards of the
SLAS, (Scalable Line Array System), which adapts easily and can be used successfully in the most diverse tasks.
Although the system has been designed to cover
short distances, (Short Throw), it
can, by just adding medium to long
distances units from the same series
(AR-210), become a full coverage P.A.
for medium to large events.
The minimum configuration consists of
six AR-208, the full advantage of a Line Array rig is reached with
nine units.
The SpiraTech enclosures, conceived as fully operational Line Array devices, offer a series of specific characteristics: |
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Continuous
and coherent wave front |
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Pattern
Control |
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Uniform
SPL |
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High
resolution sound reproduction |
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Configurable
and predictable coverage |
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Minimal
signal process and settings |
| Recommended
Applications |
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Auditoria |
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Stadia |
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Concert Halls |
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Convention Centres |
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Theatres |
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Open-air concerts and general events |
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Large Ballrooms |
| Specifications and Characteristics |
| Frequency Response (Hz) |
±3dB (1xAR208) 125Hz - 18kHz
±3dB (6xAR208) 80Hz - 18kHz |
| Horizontal Coverage Angle (-6dB) |
110º
nominal (250Hz - 18kHz) |
| Vertical Coverage Angle (-6dB) |
Variable, configuration dependant |
| Typical with
6 cabinets (0º Splay) |
30º
nominal |
| Sensitivity 1xAR208 (dB/2,83V@1m) |
Mid
100dB
High 106dB |
| Sensitivity
6xAR208 (dB/2,83V@1m) |
Mid
116dB
High 122dB
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| SPL Max./
Peak (dB SPL@1m) |
1xAR208 131dB
6xAR208 147dB |
| Impedance |
16
Ohm |
| Recommended Signal Processor |
RAM Audio LMS 244 Digital Processor |
| Constructive elements |
| Mid
frequency |
2x200mm (8") transducers with 50mm
(2") coil
300W AES (150W AES per unit) |
| High frequency |
1xCompression driver 50 mm, (2") coil,
25 mm (1") throat
100W AES |
| Enclosure
& suspension Hardware |
| Enclosure |
Horizontal
parallelepiped construction, 15mm
Baltic cross ply, tongue and groove
assembly and outer frame.
Bi-component epoxy finish |
| Protection Grille |
1.5mm
laminated steel with texture epoxy
finish |
| Enclosure
protections |
Skids
on all resting surfaces |
| Connectors |
Two
Neutrik NL-4 connectors on steel back
plate |
| Dimensions
(WxDxH) |
504
x 409 x 240 mm
19.8 x 16.1 x 9.5 inches |
| Net Weight |
18.8Kg (41 pounds) included inserted
rigging system |
| Rigging
system |
Self-contained,
integrated Rigging systems with no
protruding or loose parts for ease of
transport and assembly. Designed to
rig and fly up to 24 enclosures with a
1:5 design factor |
| Acoustic response measuring system |
The Acoustic Measures of this Line Array Unit have been made taking into account its use context, this is as an individual cabinet to be part of a Line Array Assembly.
The measure of Frequency Response is that of a single
AR-208 enclosure with our recommended, and in the case of our RAM Audio LMS 244, preset, controller settings for crossover, levels and EQ as defined in our accompanying software.
The Vertical Coverage shown in the graphs, from one to eight
AR-208, corresponds to a given system with a Splay angle of 10º
between adjacent enclosures, except for the one specified at 0º
which corresponds to a Vertical Line Array with 0º
Splay
angle.
All measures have been taken according to the Gathered Technique with a calibrated microphone centred on the enclosure or Array axis. The polar pattern data are taken symmetrically with respect to the reference axis, at 5º
intervals, from 0 to 355º, using an LMS digital measuring system. |
| SPIRATECH ARRAYS |
The configurable Arrays obtained with the
AR-208 are scalable systems, (SLAS), easily and rapidly adapted to any particular need. They follow the theory of the spiral Line Arrays. The enclosures have to be flown vertically and oriented according to the coverage required and always as a multi-enclosure system.
The 110º Horizontal coverage is constantly maintained, regardless of the Splay between the units and their amount, directly proportional to the Vertical Coverage required.
The Vertical Coverage needed, as well as the
SPL, are obtained through preset Splay angulations, while the array is assembled on the ground and depend on the number of
AR-208 enclosures used.
Our very user friendly flying fixtures permit choosing the Splay angles between 0 and 10º
according to the EASE Focus Aiming
Software for AR-208 and avoids the disagreeable
chore of having to do so simultaneously
to lifting the cabinets.
Up to twenty AR-208 can be flown from the supporting frame
TF-208. The Interface Frame IF-208
permits as well to fly under the main
system AR 210 smaller Line Array
units, (AR-208), much more efficient
and predictable than any ground
stacked front-fill. These enclosures
have a greater Horizontal Coverage of
110º to achieve a perfect near field
presence.
TF-208 Assembly Top Frame
Designed to support up to twenty
AR-208, the frame is made of laser cut steel, with an epoxy finish. It lifts the suspended Line Array from one or two anchoring points.
IF-208 Assembly Interface Frame
Built from laser cut steel, this frame
serves the purpose of assembling the
Mid size high directivity 3-way AR-210
to built a medium-large SpiraTech Line
Array with the AR-210 for long throw
and the AR-208 for short throw.
SF-208 "On stage" Frame
Built from laser cut steel, this frame
is used to fix 6 units of AR-208 and 2
units of ARSO-215 behind them. It is
very useful when there is no possible
way to fly the array, so with this
frame the system remains on the stage.
This frame includes heavy duty castors
to permit ease of movement on the
stage.
FC-208 Transport Flight-case
This convenient flight-case
safely transport two, four or six cabinets
interconnected with their
corresponding rigging pins. It serves
as well as rigging platform, one the
covers removed, the whole assembly
rolling towards the lifting's support.
FC-TF208 Assembly Frames, Transport Flight-case
This rigid, ergonomic and practical transport flight-case accepts
two double sets of top frames. It has
also a compartment for cabling. All inner surfaces are lined with high-density polyurethane
foam and divided so that every element
is individually protected.
FC-SF208 "On Stage" Frame
Flight-case
This practical transport flight-case
accepts one "on stage"
Frame.
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EASE
Focus Aiming Software |
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Download pdf info file |
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The
AR-208 enclosure is part of a Series of
systems, which allows the assembly of
different Line Arrays.
As with all the other components in this
Series, it has been conceived to offer very
high sonic performance, outstanding presence
and extreme clarity, while meeting each and
every one of the parameters that define the
Line Array Technology.
The various elements found in the enclosure
make use of sophisticated loudspeaker
coupling techniques in order to implement
the appropriate shading, thus permitting
total control of the horizontal dispersion
and avoiding the cancellations inherent to
conventional P.A. Systems.
Furthermore, the use of complex wave-guides,
permits an absolute control over the
vertical coverage, an utmost necessity when
directing our sonic energy to specific
areas. The end result is a clear message
without bouncing or reflected specific
frequencies.
The necessary Vertical Coverage is obtained
via de system's enclosures separation and
angle setting between the same.
The full Line Array system will produce a
coherent wave front which provides the
interesting peculiarity of only losing 3dB
every time we double the distance from the
sound source. Conventional systems lose 6dB
in the same circumstances. This Line Array
inherent advantage permits large SPL at long
distances while offering bearable levels in
the near field.
Another noticeable point is the easy set up
procedure, thanks to our rugged and reliable
flying assembly that permits a precise yet
rapid installation.
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