DAD HD Passive Subwoofer

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The Dynamic Audio Device (DAD) HD Passive subwoofer is a dedicated subwoofer unit for the Dynamic Audio Device Line Array Systems, delivering extended frequency response and quality sound reinforcement in live applications. 


  • Long-excursion 21″ woofer with 6″ voice coil
  • Impedance: 8Ohm
  • Recommended amplifier: up to 400W RMS/8 ohm
  • Sensitivity: 97dB@1W/1m
  • Frequency response: 30-120Hz(dB)
  • External LPF recommended range: 8OHz to 150Hz
  • Neutrik NL-4 Speakon in/out
  • Cabinet made of 18mm multilayer birch plywood, reinforced with steel strengthening
  • 21″ Nd woofer in bass-reflex loading, B4 “highly-flat” configuration for extensions of response to lowest octaves and max over diaphragm
  • Built-in mechanics for stacking of DAD HDA800 line-array systems
  • Ready to fit optional hardware for transportation


  • Subwoofer delivering extended frequency response, also in infra-bass applications
  • High pressure on low frequencies in large indoor / outdoor venues
  • Sound reinforcement in live applications, theatres of permanent installations
  • Subwoofer section of multi-amplified sound systems, combined with DAD HDA800 line-array modules

Product Information

Product Code
HD Passive Subwoofer