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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)

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Summary of Contents for Axiom SW218XA

  • Page 1: User Manual

    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����...
  • Page 2: Mechanical Drawing

    MECHANICAL DRAWING with optional wheels 121.5 cm 107.8 cm 47.83" 42.44" Swivel Mounting Pole Castor with optional transport dolly 111.0 cm 43.7" Transport Dolly Locking Pin...
  • Page 3: Optional Accessories

    OPTIONAL ACCESSORIES (available soon) Transport Dolly AC103GS 1���� mm Swivel castor without brake NAC3FXW �eutrik Powercon�� T�U��1 (for power in) Note: See assembly instruction downloadable from NEUTRIK WEB NAC3MXW �eutrik Powercon�� T�U��1 (for power out) site at: http://www.neutrik.com/ HTAC Hand tool for tightening the bushing of the powerCO� T�U��1. CAT5SLU01/05/10 LA�5S - Cat5e - �J�5 plugs and ���8MC1 connectors.
  • Page 4: Power Input

    POWER INPUT MAINS~ IN - Powercon�� �AC3PX power inlet connector. To switch the amplifier on, insert the Powercon�� connector and turn it clockwise into the O� position. To switch the amplifier off, pull back the switch on the connector and turn it counter-clockwise into the POW��� OFF position.
  • Page 5: Power Amplifiers

    The superior sound quality can be compared with top-of-the-range AB-class analog systems, while the DA modules feature a higher dynamics, very compact si��e and light weight and efficiency above ���%. The DA module employed for powering the SW218XA delivers in an ultra-compact package a ma�imum power of �������W and features PFC (Power Factor Correction), a technology able to guarantee always the...
  • Page 6: Cable Tester

    For more detailed instruction about PRONET see the PRONET USER’S MANUAL included with the software. Useful tools to set up properly a vertical array system using the SW218XA subwoofer This is a list of tools that can be very useful to set properly a vertical array system with the SW218XA active subwoofers. CABLE TESTER It is a good practice to check all cables before each installation, because even one faulty cable can compromise heavily the system performance.
  • Page 7 CARDIOID PRESET The cardioid preset must be used in a sub array of three SW218XA. Two bo� must be oriented towards the audience and one must be turned in the opposite direction (typically the bo� in the centre of the array). The bottom and the top bo�es must have the STA�DA�D P���S��T, the bo� in the middle must have the CA�DIOID P���S��T.
  • Page 8 bass cancellation direction stage wall or other big ostacle 80 cm min. 2.7 ft min. 80 cm min. 80 cm min. 2.7 ft min. 2.7 ft min. audience floor bass sum direction NOTES: When placing the cardioid array keep a distance to walls or other obstacles of at least 80 cm (2.6 ft) in order not to affect the radiation of the reversed cabinet.

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