RCF SUB 18-AX Active 18" Powered Subwoofer

The SUB 18-AX is a portable 18" active subwoofer designed for live sound with advanced processing features. It includes a color touch panel and Bluetooth® remote control. Powered by a Class-D amplifier and a state-of-the-art transducer, it delivers up to 135 dB of clear, powerful sound. Ideal for small to mid-sized venues, the SUB 18-AX integrates speaker management functions such as dual crossovers, 8-band EQs, routing, delays, cardioid configurations, and preset recall. Its robust polyurea-coated wood cabinet features a sealed Powercon True1 Top connector.

RCF Features

• 2200 Watt Class-D Amplifier
• 135 dB MAX SPL
• 18” Woofer, bass reflex housing
• Digital Crossover w/ Presets
• Multi-ply hardwood polyurea-coated
• LiveRemote App
• Dual XLR/TRS combo Input + Link, Dual XLR Xover Out
• Bass Motion Control excursion management
• Powercon True1 Top Sealed AC Connector

RCF Specifications

• Acoustical Specifications
  • Frequency Response: 35 Hz - 120 Hz
  • Max SPL @ 1m: 135 dB
  • Transducers
  • Woofer: 1 x 18", 4.0" voice coil
• Input/Output
  • Input Signal: Balanced/Unbalanced
  • Input Connectors: Combo XLR/Jack
  • Output Connectors: XLR
  • Input Sensitivity: -2 dBu / +4 dBu
• Processor
  • Protections: Thermal
  • Limiter: Soft Limiter
  • Controls: Volume encoder, touch screen for parameter management
• Power
  • Total Power: 2200 W Peak, 1100 W RMS
  • Cooling: Convection
  • Connections: Powercon TRUE1 TOP IN/OUT
• Standard Compliance
  • Safety: CE compliant
• Physical
  • Handles: 1 per side
  • Pole Mount/Cap: Yes
  • Color: Black, White
  • Dimensions: Height 693 mm / 27.28 in, Width 505 mm / 19.88 in, Depth 685 mm / 26.97 in
  • Weight: 43.8 kg / 96.56 lbs