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Designed for flexibility, it can be deployed in flown configurations or ground-stacked setups alongside WLA-1 full-range elements. With its robust design and advanced driver engineering, WLA-121SUB delivers the foundation for a truly commanding full-range system.

Technical Specifications
  • System Type: 21" Passive Subwoofer
  • Frequency Response (+/-3 dB): 25 Hz – 100 Hz
  • Frequency Range (-10 dB): 18 Hz – 125 Hz
  • Sensitivity (2.83 V/1 m): 103 dB
  • Maximum SPL (1 m): 141 dB (Calculated), 147 dB (Peak)
  • Impedance: 4 
  • Power Handling: 1600 W Continuous / 3200 W Program / 6400 W Peak
    Transducer & Structure
  • Transducer: 1 x 21" (545 mm) with 4.0" (101.6 mm) voice coil (QUATTRO 4-layer)
  • Frame Material: Aluminum
  • Enclosure: 18 mm Plywood / Tough-Tone finish
  • Grille: Powder-coated steel
  • Handles: 4 x side handles, 2 x top/bottom handles
  • Connectors: 2 x SpeakON compatible