Axiom SW218XA User Manual

KEY FEATURES
• Very High Output
• High-strength, water repellent, glass fiber reinforced cones • Tetracoil�� dual voice coil for e�tended linear response and increased power handling
• Digitally controlled Class D amplifier module with SMPS
INTRODUCTION
The SW218XA subwoofer is designed to deliver high quality low frequency reproduction where very high
output is a key requirement, together with well defined deep bass response and fast transient response.
The very high output makes it ideal for concert touring and festival applications requiring high levels of
low frequency response, such as hard rock and electronic music, and for top level dance music clubs.
The SW218XA is a very high quality powered subwoofer system featuring some of the most advanced
technologies for low frequency reproduction. Its unique and innovative design is based on a configuration
that can be defined as Manifolded Transmission Line.
It uses manifolding of the front side of the cones to ma�imi��e the mutual coupling between the two
drivers, while loading the back of the cone with a large-si��e transmission line that has the function to
create a transmission path from the back of the transducers to the front. This innovative configuration
does not use any large resonant cavity to load the speaker in order to get the lower octave and this
reduces significantly pressure decay time inside the enclosure, with large advantages in terms of
definition both at the lowest end and the upper bass. At the same time, it doesn't use very long
transmission line paths as well. Its working principle is an hybrid combination between a short transmission line and an overdamped re��e� load.
Moreover, the ma�imi��ation of the mutual coupling between the drivers increase the fastness of the transient response while ma�imi��ing the
overall energy efficiency as well.
The SW218XA subwoofer system is equipped with two high power 18" (����mm) transducers capable of very long e�cursion (up to 3��mm peak-
to-peak) and featuring a large displacement suspension system. These transducers use Tetracoil technology, where two different, a�ially separated
magnetic gaps and two inside-outside 1���� mm ( �" ) diameter voice coils are wound on the same former and suspended evenly in the two magnetic
gaps. This creates an equivalent voice coil diameter greater than �", resulting in a larger heat dissipation area for and increased power handling.
Additional key advantages of the Tetracoil technology are also minimi��ed distortion and a very symmetric and ��at inductance curve. Cones are
made of very high-stiffness fiberglass reinforced paper, featuring also invisible water repellent treatment.
TECHNICAL SPECIFICATION
Acoustical
System type
Transducer
Frequency response (±3 dB)
Ma�imum Peak SPL @ 1m
Electrical
Input Impedance
Input Sensitivity
Signal Processing
Direct access Controls
�emote Controls
�etwork protocol
* Nominal consumption is measured with pink noise with a crest factor of 12
dB, this can be considered a standard music program.
revision 2��17-��3-2�

USER MANUAL

SW218XA
active subwoofer
Manifolded Transmission Line
Two 18" (���� mm), 1����mm (�in) Tetracoil��
dual voice coil, equivalent to a single coil
diameter larger than 152mm (>�in).
Water repellent cone and epo�y coated
plates.
Ultra linear suspension behavior.
3�� H�� – �2 H�� (Processed)
1�3 dB
2�� k٠balanced
+� dBu �� 1.25 V
CO��� processing, ��kH�� �� ���bit ��oating
point SHA�C DSP, 2� bit AD��DA converters
� Presets: Standard, InfraSub, Cardioid, User. Paint
�etwork Termination, G�D Link
P�O���T control software
CA�BUS
• Manifolded Transmission Line configuration for very fast transient response
• Tetracoil�� dual voice coil for e�tended linear response and increased power handling Tetracoil�� dual voice coil for e�tended linear response and increased power handling
• ���H�� �� ��� bit ��oating point CO��� processing with P�O���T remote control • ���H�� �� ��� bit ��oating point CO��� processing with P�O���T remote control
Amplifier Type
Output Power
Mains Voltage �ange (Vac)
Mains Connector
Consumption*
I� �� OUT Connectors
I� �� OUT �etwork Connectors
Mechanical
Width
Height
Depth
Depth with Wheels �� Dolly
Construction
Transport
�et Weight
Wheels or Transport Dolly
Class D with Variable Switching Frequency
and SMPS and PFC
2������ W + 2������ W
1����-2��� V~ 5������� H��
PowerCon T�U��1 - �AC3PX (In��Out)
����� W (nominal) 18���� W (ma�)
�eutrik XL�-M �� XL�-F
��TH���CO��� (���8FAV)
1215 mm (�7.87")
5��� mm (23.2�")
�5�� mm (37.�3")
1��78 mm (�2.��") �� 111�� mm (�3.7��") 111�� mm (�3.7��")
15 mm, reinforced Phenolic Birch
High resistance, water based paint
1�� handles
121.2 �g (2�7.2 lbs.)
� heavy-load 1���� mm ø (optional)