Axiom SW218A User Manual

KEY FEATURES

• Very High Output
• Compact size for a very good output-toweight ra o
• Digitally controlled Class D amplifi er module with SMPS

INTRODUCTION

The SW218A subwoofer is designed to deliver high quality low frequency reproduc on where very high output is a key requirement, together
with well defi ned deep bass response and fast transient response. Its compact size and light weight
make it suitable for several diff erent uses, ranging from touring applica ons to fi xed installa ons and
high-level dance clubs.
The SW218A is a very high quality powered subwoofer system featuring some of the most advanced
technologies for low frequency reproduc on. Its unique and innova ve design is based on a confi gura on
that can be defi ned as Manifolded Transmission Line.
It uses manifolding of the front side of the cones to maximize the mutual coupling between the
two drivers, while loading the back of the cone with a large-size transmission line that has the
func on to create a transmission path from the back of the transducers to the front. This innova ve
confi gura on does not use any large resonant cavity to load the speaker in order to get the lower
octave and this reduces signifi cantly pressure decay me inside the enclosure, with large advantages
in terms of defi ni on both at the lowest end and the upper bass. At the same me, it doesn't use very
long transmission line paths as well. Its working principle is an hybrid combina on between a short
transmission line and an overdamped refl ex load. Moreover, the maximiza on of the mutual coupling between the drivers increase the fastness
of the transient response while maximizing the overall energy effi ciency as well.
The SW218A subwoofer system is equipped with two high power 18" (460mm) transducers capable of long excursion (up to 30mm peak-to-
peak), controlled by high s ff ness Double Silicon Spider as centering suspension and by heavy duty surround. The motor structure features high
strength (BL²/Re) with op mized symmetry and excursion controlled by Inner Flux Demodula ng Ring. The robust copper 100mm (4") voice coil is
wounded in two diff erent layers both outside and inside the coil support, then doubling the coil surface exposed to air cooling and consequently
improving the long term thermal capacity of the loudspeaker. Cones are made of very high-s ff ness glass fi ber reinforced paper, featuring also
invisible water repellent treatment.

TECHNICAL SPECIFICATION

Acous cal
System type
Transducer
Frequency response (±3 dB)
Maximum Peak SPL @ 1m
Electrical
Input Impedance
Input Sensi vity
Signal Processing
Direct access Controls
Remote Controls
Network protocol
* Nominal consump on is measured with pink noise with a crest factor of 12
dB, this can be considered a standard music program.
revision 2014-11-10
USER MANUAL
SW218A
ac ve subwoofer
Manifolded Transmission Line
Two 18" (460 mm), 4" (100 mm) VC,
High s ff ness, water repellent, glass fi bre
reinforced cone
Flux Demodula ng Ring VC
Double Centering Spider Suspension
36 Hz – 100 Hz (Processed)
141 dB
20 kΩ balanced
+4 dBu / 1.25 V
CORE processing, 96kHz / 40bit fl oa ng
point SHARC DSP, 24 bit AD/DA converters
4 Presets: Standard, InfraSub, Cardioid, User. Paint
Network Termina on, GND Link
Pronet control so ware
CANBUS
• Manifolded Transmission Line confi gura on for very fast transient response
• 96KHz / 40 bit fl oa ng point CORE processing with PRONET remote control
Amplifi er Type
Output Power
Mains Voltage Range (Vac)
Mains Connector
Consump on*
IN / OUT Connectors
IN / OUT Network Connectors
Mechanical
Width
Height
Depth
Depth Including Wheels
Construc on
Wheels
Transport
Net Weight
Class D with Variable Switching Frequency
and SMPS
2000 W + 2000 W
230 V~ ±15% or 115 V~ ±15% 50/60 Hz
PowerCon® (NAC3MPA + NAC3MPB)
1400 W (nominal) 3400 W (max)
Neutrik XLR-M / XLR-F
ETHERCON® (NE8FAV)
1215 mm (47.87")
590 mm (23.24")
950 mm (37.43")
1050 mm (41.37")
15 mm, reinforced Phenolic Birch
High resistance, water based paint
4 heavy-load 100 mm ø
10 handles
101.7 Kg (223.7 lbs.)