Martin Audio SXP218 2 X 18″ powered subwoofer

2000W AES, 8000W peak - Black Durable Polyurea Coating Finish - 144dB Max SPL

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What's in the box:

  • SX218
  • 5-year Limited Warranty

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Sound Reinforcement For Small And Medium-Size Venues

The Martin Audio SX218 Dual-Driver, Direct Radiating Subwoofer delivers very high output levels and superb transient performance with minimal distortion. With an operating range of 35Hz-150Hz ± 3dB, this loudspeaker houses dual 18" long-excursion (460mm)/4" (100mm) voice coil drivers with water-resistant cones and triple roll surrounds. Each driver is rated to handle 1000 watts AES, and has a magnet structure and suspension engineered for maximum linear excursion. The enclosure of this professional subwoofer is constructed from multi-laminate birch ply and finished with a durable polyurea coating. Eight reflex ports provide a large frontal area to reduce turbulent air noise, and a perforated steel grille protects the drivers from damage. The Martin Audio SX218 features a M20 pole mount insert for added versatility in deployment. The product is supplied as standard without cabinet wheels, but they are available as an accessory.


  • Dual-Driver, Direct Radiating Subwoofer
  • 2 X 18” (460mm)/4” (100mm) Voice Coil, Long Excursion, Ferrite Magnet, Waterproof Cone
  • Very High Output Capability
  • Tour-Grade Plywood Enclosure With Flying Inserts

Specifications for the Martin Audio SXP218

{ "Acoustics": { "TYPE": "Dual-driver, direct radiating powered subwoofer", "FREQUENCY RESPONSE(3)": "35㎐ – 150㎐ ±3㏈, -10㏈ @ 30㎐", "DRIVER": "2x 18” (460㎜)/4” (100㎜) voice coil, long excursion, ferrite magnet,waterproof cone", "INPUT SENSITIVITY": "-30㏈u for 100㏈ SPL", "MAXIMUM SPL(4)": "140㏈ continuous / 143㏈ peak", "DISPERSION": "Omnidirectional / or Cardioid (paired)", "CROSSOVER": "Active Presets for CDD Live 8, 12 & 15 mono-pole or cardioid (paired)" }, "Module Audio input": { "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 (+21㏈u), over voltage protected", "Internal Processing": "Multi-channel DSP, programmable via TCP/IP using VU-Net softwarePEQ/shelving filtersUp to 48㏈/Oct LPFUp to 200mS input delayPre-set selection via rear panel switch" }, "Network": { "CONNECTORS": "2 x Neutrik® Ethercon RJ45", "PROTOCOL": "TCP/IP and UDP/IP" }, "Amplifier Module": { "TYPE": "Two 2 channel switch-mode, class D, Bridged Tied Load", "PEAK OUTPUT POWER": "4000W", "AVERAGE EFFICIENCY": "89%", "COOLING": "External fan", "MAXIMUM AMBIENT TEMPERATURE": "40°C (104°F) for full output", "Power Supply": { "TYPE": "Switch mode, fixed frequency with PFC", "AC INPUT OPERATING RANGE": "85 – 265V ∼ AC, 50 - 60㎐", "POWER FACTOR": "> 0.98", "NOMINAL POWER CONSUMPTION": "250W", "MAINS CONNECTOR": "Neutrik® Powercon True1" } }, "Mechanical": { "ENCLOSURE": "Extensively braced multi-laminate birch plywood.", "FINISH": "Durable Polyurea Coating", "PROTECTIVE GRILLE": "Black perforated Zintec", "FITTINGS": [ "Two skids on base, with mating channels on top", "16 x M8 inserts for optional castors", "24 x M10 mounting points", "4x Bar handles, 2 on each side", "4x fittings for optional transit cover", "M20 Pole mount insert" ], "IP RATING": "IP24 factory option available", "DIMENSIONS": [ "(W) 1085㎜ x (H) 537㎜ x (D) 792㎜ (920㎜ including castors)", "(W) 42.72in x (H) 21.13in x (D) 31.16in (36.20in including castors)" ], "WEIGHT": "101.5㎏ (224lbs) w/o castors 105㎏ (231lbs) with castors" } }

Research Materials for SXP218 (MAU-SXP218B)

We've added technical materials to help with your buying decision. Even if you're technically inclined, you may want to consider talking to our sales techs to make sure this item is the right fit for your particular use. 800.562.6006

SXP218 (MAU-SXP218B) Specifications

SXP218 (MAU-SXP218B) Drawing

SX Series Brochure

SX Series User Guide

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