Thunder-KS1P I

The Thunder-KS1P I is a compact passive subwoofer featuring a long excursion 12” cone driver with 3” voice coil. The Thunder-KS1P I features 2x SpeakON NL4 connectors that allow to input the signals from external active systems or amplifiers, with either a 2-wire or a 4-wire cable, as well as route the signal to other loudspeakers.


Ultra-light, high power subwoofers



  • Type:  

    Passive subwoofer

  • Transducers:  

    12" neodymium magnet woofer

  • Frequency Response:  

    35 Hz - 150/450 Hz (-6 dB) crossover dependant

  • Crossover:  

    External DSP-controlled,
    Low Pass @ 150 Hz up to 450 Hz, preset dependant

  • Max SPL:  


  • Rated Power:  

    1200W peak

  • Coverage:  


  • Coverage:  

    2 x Speakon NL4

  • Nominal Impedance:  


  • Disclaimer:  

    Passive loudspeakers requires dedicated preset loaded on board of K-array amplifiers.

  • Disclaimer:  

    New materials and design are introduced into existing products without previous notice.

Handling and Finishes

  • Dimensions (W x H x D):  

    500 x 350 x 440 mm
    (19.7 x 13.8 x 17.3 in)

  • Weight:  

    18 kg (39.7 lb)

  • Material:  

    Polyurea coated birch plywood

  • Colors:  

    Black/White/Custom RAL


  • IP Rating:  

    54 (5)



  • Amp Module:  


  • Output Power:  


  • Power Consumption:  


  • (1) With dedicated preset
  • (2) Maximum SPL is calculated using a signal with crest factor 4 (12dB) measured at 1 m.
  • (3) Included 17 mm (0.7 in) removable rubber feet
  • (4) In case of permament, long lasting installation in critical environments (swimming pools, beaches, yachts..), we recommend to further protect the subwoofer. Contact K-array directly to discuss best protection practices.


Thunder-KS1P Datasheet

ver 1.0

KS1P Layout

Amp-to-speaker matching table

Thunder KS User Manual

Thunder-KS1P I BIM


Thunder KS User Manual

CE Declaration of Conformity

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