The CSX-LIVE 218 achieves the ultimate in subwoofer performance for the most demanding professional applications – delivering very high output levels and superb transient performance with minimal distortion. With an operating range of 35Hz-150Hz ± 3dB, it houses dual 18” long-excursion (460mm)/4” (100mm) voice coil drivers with water-resistant cones and triple roll surrounds.


The design of the 18” drivers maximises output while minimising power compression and distortion, and the eight reflex ports have a large frontal area to reduce turbulent air noise at very high levels. With a prodigious maximum SPL capability of 143dB peak at 1 metre, the CSX-LIVE 218 is the ideal subwoofer for touring sound reinforcement, theatre and portable live sound applications — as well as premium installations — that require low frequency augmentation with low distortion at very high output levels.



  • Dual-driver, self-powered subwoofer
  • 2 x 18” (460mm) drivers with 4” (100mm) voice coils
  • Very high output capability
  • Onboard Class D amplification and DSP
  • Dante™ Digital Audio networking
  • Global mains operation with Power Factor Correction
  • Tour-grade plywood enclosure with flying inserts
  • IP24 rating option with rain cowl



  • Live sound reinforcement
  • Theatre sound
  • Corporate AV events
  • Fixed installations in concert halls, ballrooms and HoW
  • Bars and clubs


A self-powered system, the CSX-LIVE 218 incorporates a Class D amplifier, DSP and Dante™ digital audio networking — simplifying set-up, enhancing control and eliminating amplifier racks. The onboard amplifier delivers a total of 4000W peak output to the drivers, and its switched-mode power supply auto-ranges to global mains voltages from 100 to 240V 50/60Hz. DSP functions — including parametric EQ, delay, muting, gain and preset selection — can be controlled over Ethernet from a PC or Windows® tablet via intuitive VU-NET™ proprietary software.


For simple set-ups, ‘plug-and-play’ presets for operation with the CDD-LIVE 8, 12 or 15 — as well as a user-defined preset — can be selected on the rear panel, instead of using computer control. Additional presets provide the appropriate settings for the rear-facing subwoofer in a cardioid pair.

As an alternative to its analogue inputs, the CSX-LIVE 218 is Dante enabled for digital audio distribution and control over a single CAT5 cable to maintain audio quality however long the cable run.

The enclosure is constructed from multi-laminate plywood with a durable polyurea coating and equipped with a perforated steel grille, four grab handles, skids and M10 flying inserts.

    Martin Audio CSX-LIVE 218 Powered Subwoofer

      TYPE Dual-driver, direct radiating powered subwoofer
      RESPONSE (3)
      35Hz – 150Hz ±3dB, -10dB @ 30Hz
      DRIVER 2x 18” (460mm)/4” (100mm) voice coil, long excursion, ferrite magnet,
      waterproof cone
      INPUT SENSITIVITY -30dBu for 100dB SPL
      MAXIMUM SPL (4) 140dB continuous / 143dB peak
      DISPERSION Omnidirectional / or Cardioid (paired)
      CROSSOVER Active Presets for CDD Live 8, 12 & 15 mono-pole or cardioid (paired)
      CONNECTORS Female XLR input, male XLR link output, Dante Audio Neutrik® Ethercon
      ANALOGUE INPUT IMPEDANCE 20 kΩ balanced to ground
      MAXIMUM ANALOGUE INPUT LEVEL 24.6 Vpp (+21dBu), over voltage protected
      INTERNAL PROCESSING Multi-channel DSP, programmable via TCP/IP using VU-Net software
      PEQ/shelving filters
      Up to 48dB/Oct LPF
      Up to 200mS input delay
      Pre-set selection via rear panel switch
      CONNECTORS 2xNeutrik® Ethercon RJ45
      AMPLIFIER MODULE                                     
      TYPE Two 2 channel switch-mode, class D,
      Bridged Tied Load
      COOLING External fan
      MAXIMUM AMBIENT TEMPERATURE 40°C (104°F) for full output
      TYPE Switch mode, fixed frequency with PFC
      AC INPUT OPERATING RANGE 85 – 265V ~ AC, 50 - 60Hz
      POWER FACTOR > 0.98
      MAINS CONNECTOR Neutrik® Powercon True1
      ENCLOSURE Extensively braced multi-laminate birch plywood.
      FINISH Textured black PU coating.
      PROTECTIVE GRILLE HEX perforated mild steel with protective zinc plating and black powder coat finish
      FITTINGS Two skids on base, with mating channels on top
      Four rear-mounted 100mm (4in) castors
      24 x M10 mounting points
      4x Bar handles, 2 on each side
      4x fittings for optional transit cover
      Optional weather protection cowl
      IP RATING IP24 factory option available
      DIMENSIONS (W) 1085mm x (H) 537mm x (D) 792mm (920mm including castors)
      (W) 42.72in x (H) 21.13in x (D) 31.16in (36.20in including castors)
      WEIGHT 105kg (231lbs) excluding Transit cover
      ACCESSORIES Transit Cover


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