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The Thunder-KMT18P is a 18" compact passive subwoofer designed to provide high-performance low-end frequency response for use with small to medium wavefront systems in both live sound and install applications. It features a 800 watt 18” drive unit with magnet structure and suspension engineered for maximum linear excursion.

At a perfomance output of 133 dB, the Thunder-KMT18P is ideal for medium throw applications.

More information about the Thunder line

Unique Performance-to-Size Ratio

Produces an impressive high-power performance by producing a high SPL from a small frame.


Four-Corner Port Configuration

The unique four-corner port configuration provides symmetrical back loading to the speakers, for extended bass response with very low distortion.



We created a portfolio complete with lightweight products that are easy to transportation and quick to setup optimizing logistics, space, labor costs and time.


Color Customizable

We have the ability to customize your project by color matching your system to any RAL code to help you to better integrate the speakers into a wide variety of venues.



Dante Compatible

With the dedicated K-dante accessory, this solution can be integrated into a Dante network making it interoperable with other devices.




  • Type Passive subwoofer
  • Transducers 18" neodymium magnet woofer
  • Frequency Response (1) 40 Hz – 150 Hz (-6 dB)
  • Maximum SPL (2) 133 dB (peak)
  • Rated Power 1400 W
  • Coverage Omni
  • Connectors speakOn NL4 1+ 1- (signal); 2+ 2- (through)
  • Nominal Impedance 8 Ω

Handling and Finishes

  • Dimensions (W x H x D) (3) 465 x 482 x 600 mm (18.3 x 19 x 23.6 in)
  • Weight 23,8 kg (52.5 lb)
  • Material Wood
  • Color Black, White, Custom RAL


  • IP Rating IP43
  • Notes for data:
    (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

    Passive loudspeakers require dedicated presets loaded on K-array amplifiers.
    New materials and designs are introduced into existing products without previous notice.

Customers Applications

Thunder-KMT18P can be successfully used in a range of different settings and events.

Discover all the projects where Thunder-KMT18P products have been used