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The Rumble-KU44 line array element is an extremely compact, array-able subwoofer comprised of two 4” neodymium magnet woofers and two 4” passive radiators engineered for maximum linear excursion and minimum residual noise.

For easier use and integration with all Kommander amplifiers, the KU44 allows the user to choose between two different values of impedance (8/32 Ω). At 32 Ω, as many as eight KU44 units can be powered off a single Kommander amplifier channel.

More information about the Rumble line


Visually Discreet

For architectural reasons, a visually discreet audio system may be required to integrate seamlessly with the layout without compromising sound quality.



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


Modular Capabilities

For maximum adaptability to any venue, our slim line arrays are modular when employing dedicated hardware that allows the joining of more units to reach a desired length and guarantee a perfect coverage.


Premium Finishes

Similar to high-end fashion accessories and jewelry, our products undergo the most advanced coating process for a more beautiful and lustrous look.


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.


Weather Resistant

We utilize the most durable and resistant materials when developing our products to protect and conserve the system regardless of the elements, rendering a K-array installation reliable and long-lasting.


Marine Compliant

We have developed and refined a customized finishing for Marine applications. The finishing can resist bad weather and oxidation caused by salt water.



Selectable Impedance

Selectable impedance lets the user to choose the right loudspeaker impedance value allowing to set the proper load and maximize performance.


Self-Powered Capabilities

Our self-powered solutions prevent distortion from cumbersome and fragile passive crossovers and power loss due to long running cables, and offer plenty of advantages ranging from the compactness of the solution to the ease of integration with new and existing sound systems.




  • Type Passive subwoofer
  • Transducers 2 x 4" neodymium magnet woofers / 2 x 4" passive radiators
  • Frequency Response (1) 50 Hz – 150 Hz (-6 dB)
  • Maximum SPL (2) 116 dB (peak)
  • Rated Power 120 W
  • Coverage Omni
  • Connectors 4PIN euroblock connector (included)
  • Nominal Impedance 8 Ω / 32 Ω selectable

Handling and Finishes

  • Dimensions (W x H x D) 500 x 116 x 100 mm (19.7 x 4.6 x 4.0 in) (3)
  • Weight 5,9 kg (13.0 lb)
  • Material Stainless Steel
  • Color Black, White, Custom RAL
  • Finishes Gold, Polished, Brushed


  • IP Rating IP64 (4)
  • Notes for data:
    (1) With dedicated preset
    (2) Maximum SPL is calculated using crest factor 4 (12dB) measured at 1 m.
    (3) Removable rubber feet not included.
    (4) More complete water protection with K-KUIP4 accessory.

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

Customers Applications

Rumble-KU44 can be successfully used in a range of different settings and events.

Discover all the projects where Rumble-KU44 products have been used