The KSC18P is a passive 18-inch subwoofer specifically designed for cinema and theater applications, where LF contour reinforcement and sound effects ask for impact and deep bass. The KSC18P implements a single 18” high excursion woofer in a compact bass-reflex enclosure, acoustically optimized for operating at high SPL in very demanding conditions. The small footprint and the extended low-end response makes this subwoofer the perfect companion in Cinemas, Theaters and Home Entertainment environments.


Ultra-light, high power subwoofers



  • Type:  

    Passive subwoofer

  • Transducers:  

    18” neodymium magnet with 4.5” voice coil

  • Frequency Response:  

    15 Hz – 150 Hz (-6 dB)

  • Max SPL:  

    134 dB (peak)

  • Rated Power:  

    3600 W

  • Coverage:  


  • Nominal Impedance:  

    4 Ω

Handling and Finishes

  • Dimensions (W x H x D):  

    1100 x 700 x 380 mm (43.3 x 27.6 x 15 in)

  • Weight:  

    53 kg (116,85 lb)

  • Material:  


  • Colors:  



  • IP Rating:  


  • (1) With dedicated preset
  • (2) Maximum SPL is calculated using a signal with crest factor 2 (6dB) measured at 1 m.


Thunder-KSC18P Datasheet

ver 1.0

CE Declaration of Conformity

Amp-to-speaker matching table

Thunder-KSC18P BIM


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