Axiom SW1800A Dual 18″ Powered Subwoofer

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The SW1800A is a compact powered manifolded subwoofer designed to provide sub-bass support for the compact AX800A compact line array and features some of the most advanced technologies for low-frequency reproduction.

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Axiom SW1800A Dual 18″ Powered Subwoofer

The Axiom SW1800A is a compact powered manifolded subwoofer designed to provide sub-bass support for the compact AX800A compact line array, and features some of the most advanced technologies for low frequency reproduction. The manifolded bandpass design uses manifold loading of the front side of the speaker cones to maximize the mutual coupling between the two drivers.

This innovative configuration does not use any large resonant cavity to load the speakers, but very compact cavities in order to obtain advantages in terms of definition, both at the lowest end and the upper bass.


The SW1800A subwoofer system is equipped with two high power 18” (460mm) transducers with 3” voice coils wound on aluminium formers for good heat dissipation. The speaker cones feature a humidity resistant treatment which makes the SW1800A very suitable for outdoor concert touring applications.

SW1800A Sonic Performance

The SW1800A represents an innovative subwoofer design that features a solid low-frequency definition and a “punchy” feeling in the upper bass range. The combination of accuracy in acoustic transient response together with the use of the latest technology in transducer linearity, signal processing and power amplifiers allows the SW1800A to deliver unprecedented low frequency reproduction quality with solid deep end.

Together with very fast and accurate bass response. It is designed to complement the AX800A line array in an approximate 4:1 ratio.


The 15mm birch plywood enclosure features two 35mm pole mount sockets, one on the top and one on the side, allowing satellite speakers such as AX800A compact line array elements or any ED series point source loudspeakers to be securely pole mounted on top of the subwoofer at an optimum height for best audience coverage.

Heavy-duty wheels and flush handles are provided for easy transportation and handling, while matching stacking recesses and feet enable stable ground stacks to be assembled.

Signal Processing

The system processing is based on the CORE DSP platform designed by the PROEL R&D Laboratories using one of the most advanced SHARC DSP devices available for audio applications. It features 40bit, 96kHz floating point resolution and top-quality 24-bit AD/DA converters for perfect signal integrity, dynamic range in excess of 110dB, and superior sonic performance.

Thanks to its massive processing power, the CORE platform is capable of providing the most sophisticated algorithms for speaker processing, together with comprehensive remote control and networking capabilities.

The PRONET control software, working on a solid and reliable CANBUS based network protocol, provides an intuitive interface for the remote control of the whole audio system via the rear panel etherCON RJ45 connectors, with the possibility to equalise and delay individual devices, as well as setting driver protection parameters, and monitoring the status of the amplifier.

Four factory DSP presets are provided for when the SW1800A subwoofer is not connected to a network, and allow for rapid and simple setup: Standard, for general purpose use; Infra Sub, as an additional very low frequency band or for sub-bass effects; Cardioid, for use in directional bass arrays; and User, allowing custom parameters to be designed in PRONET and recalled for specific situations when off-line.

SW1800A Power Amplifier

The Axiom SW1800A is powered by a DA SERIES digital power module, a new generation of CLASS D power amplifier with digitally-controlled SMPS.  The innovative technology used for these amplifiers offers performance at the top of the range, such as superior sound definition at any audio frequency, very high dynamics for low level signals, and very low distortion even at maximum power.

The amplifier’s superior sound quality can be compared with top-of-the-range AB-class analog systems, while the DA modules feature higher dynamic range, very compact size, light weight, and efficiency above 90%. The amplifier delivers 1000 watts into each driver individually. Input and link connections are via balanced 3-pin XLR connectors, and a ground lift switch is provided for hum-free operation.

SW1800A Highlights:

  • Compact high-output dual 18″ subwoofer
  • Manifolded Band Pass configuration for a high output in a compact size
  • Perfectly matched for the AX800A line array elements
  • Compact high-output dual 18″ subwoofer
  • Manifolded Band Pass configuration for a high output in a compact size
  • Perfectly matched for the AX800A line array elements
  • High-strength, water repellent cones
  • Advanced CORE processing with Sharc DSP and PRONET PA management
  • Digitally controlled Class D amplifier module with SMPS
  • Designed and made in Italy

System’s Acoustic Principle: Manifolded Band Pass
Frequency Response (±3dB): 36 Hz – 115 Hz (Processed)
Maximum Peak SPL @ 1m: 139 dB

Type: Two 18” (460mm) woofers, 3” (75mm) VC
Cone: High stiffness, water repellent

Input Impedance: 20 kΩ balanced, 10 kΩ unbalanced
Input Sensitivity: +4dBu / 1.25 V
Signal Processing: CORE processing, 96kHz / 40bit floating point SHARC DSP, 24 bit AD/DA converters
Direct access Controls: 4 Presets (Standard/InfraSub/Cardioid/User), Network Termination, GND Link
Remote Controls: PRONET control software
Network protocol: CANBUS
Amplifier Type: Class D with SMPS, Variable Switching Frequency
Output Power: 1000W + 1000W
Mains Voltage Range (Vac): 230V ±15% – 115 ±15% 50/60Hz (internally selectable)
IN / OUT Connectors: Neutrik XLR-M / XLR-F
IN / OUT Network Connectors: ETHERCON®(NE8FAV)
Mains Connectors: PowerCon® TRUE1 – NAC3PX (In/Out)
Cooling: Variable speed DC fan

Enclosure & Construction
Width: 570 mm (22.40”)
Height: 960 mm (37.80”)
Depth: 880 mm (34.65”)
Depth: Including Wheels 1008 mm (39.70”)
Enclosure Material: 15mm, reinforced phenolic birch
Paint: High-resistance, water-based paint
Transport: 4 heavy-duty 100 mm (4″) castors, 6 handles
Net Weight: 70 Kg

For more information, please visit the manufacturer's website.