Martin Audio SXP118

The Martin Audio SXP118 is a compact, self-powered subwoofer designed to extend the low-frequency performance of CDD-LIVE systems down to 40Hz while delivering exceptional bass impact and increased system headroom. Featuring a high-performance 18-inch long-excursion driver with a 4-inch voice coil, waterproof cone, and advanced reflex enclosure design, the SXP118 provides powerful and controlled low-frequency reproduction with minimal distortion. Equipped with onboard Class D amplification, integrated DSP processing, Dante™ networking, and global power compatibility, it is an ideal solution for portable live sound, theatre productions, and premium fixed installations requiring maximum performance from a compact powered subwoofer.

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Key Features

• Compact self-powered subwoofer
• 18-inch long-excursion low-frequency driver
• 4-inch high-power voice coil
• Integrated Class D amplifier module
• Built-in DSP processing
• Dante™ digital audio networking
• High-output reflex enclosure design
• Low distortion and reduced power compression
• Omnidirectional or cardioid operation when paired
• Global mains operation with Power Factor Correction (PFC)
• Tour-grade plywood enclosure
• Pole-mount capability
• Optional IP24 weather protection version
• VU-Net software control and monitoring

Technical Specifications

• Type: Compact Direct-Radiating Powered Subwoofer
• Frequency Response: 47Hz – 150Hz (±3dB), -10dB @ 41Hz
• Driver:
  • 18″ (460mm) Long-Excursion Driver
  • 4″ (100mm) Voice Coil
  • Ferrite Magnet
  • Waterproof Cone
• Input Sensitivity:
  • -20dBu for 100dB SPL (CDD12/15 Preset)
  • -13dBu for 100dB SPL (CDD8 Preset)
• Maximum SPL:
  • 132dB Continuous
  • 135dB Peak
• Dispersion:
  • Omnidirectional
  • Cardioid (When Paired)
• Crossover:
  • Active Presets for CDD-LIVE 8
  • Active Presets for CDD-LIVE 12
  • Active Presets for CDD-LIVE 15
  • Mono-Pole or Cardioid Configurations

Audio & DSP

• Audio Input:
  • 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 and Shelving Filters
  • Up to 48dB/Oct LPF
  • Up to 200ms Input Delay
  • Rear Panel Preset Selection

Network

• Connectors:
  • 2 × Neutrik® Ethercon
• Protocols:
  • TCP/IP
  • UDP/IP

Amplifier Module

• Type:
  • 2-Channel Switch-Mode Class D
  • Bridged-Tied Configuration
• Peak Output Power:
  • 2000W Total
• Average Efficiency:
  • 89%
• Cooling:
  • External Fan Cooling
• Maximum Ambient Temperature:
  • 40°C (104°F)

Power Supply

• Type:
  • Switch-Mode Power Supply
  • Fixed Frequency with PFC
• AC Input Range:
  • 85 – 265V AC
  • 50 – 60Hz
• Power Factor:

  • 0.98

• Nominal Power Consumption:
  • 550W
• Mains Connector:
  • Neutrik® Powercon True1

Mechanical Specifications

• Enclosure:
  • Extensively Braced Multi-Laminate Plywood
• Finish:
  • Durable Polyurea Coating
• Grille:
  • Black Perforated Zintec Steel
• Fittings:
  • Two Base Skids with Mating Top Channels
  • M20 Pole Mount Thread Plate
  • 16 × M10 Mounting Points
  • 16 × M8 Inserts for Optional Castors
  • 2 × Bar Handles
  • 4 × Transit Cover Attachment Points
• IP Rating:
  • Optional IP24 Factory Version
• Dimensions (W × H × D):
  • 600 × 507 × 632 mm
  • 600 × 507 × 760 mm (With Castors)
• Weight:
  • 46.5 kg (Without Castors)
  • 50 kg (With Castors)