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The Axle-KRX402 is the medium format system of our Axle line that delivers more pressure and a more extended bass response than the smaller Axle-KRX202. It is comprised of an array of two Dragon-KX12 12" coaxial loudspeakers, which can be flown, paired with one 21” Thunder-KMT21 subwoofer per side in a stereo configuration.

More information about the Axle line

axle features
High Pressure in the Near Field

The emission of point source loudspeakers is characterized by high sound pressure levels in the near field, ideal for applications where the audience is close to the sound source, like clubs, dance floors and live events, like DJ sets.


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.


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.



Integrated DSP

Built-in DSP allows for fine tuning of every single sonic parameter of the loudspeaker, providing the sound engineer the highest control on overall performance and fine granularity in system configuration.


KMT12 Digital Signal Processor Active Subwoofer Feature
Selectable Coverage

The directivity of many K-array solutions can be modified in order to optimize the coverage by an adjustable horn with variable orientation.


Spot/Flood Dragon
Dante Compatible

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


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.


Onboard Touch Screen

An integrated touch screen provides intuitive control over the main DSP functions, from signal routing to level and delay settings.



Thunder-KMT21 I


  • Power handling 1600 W (AES)
  • Impedance
  • Frequency range 30 Hz - 150 Hz ± 3dB (preset relating)
  • Maximum SPL 136 dB (peak)


  • Horizontal Omni°
  • Vertical Omni°


  • Type DSP controlled
  • Frequency 150 Hz (preset dependent)


  • Full-range 1 x 21” neodymium speakers with 3” voice coil


  • Type 1 Class D module - DSP controlled
  • Power 2400 Watt @ 4Ω
  • Protection Dynamic limiter, over current, over temp, short circuits

Physical Overview

  • Dimension 55.5 x 55.5 x 76.3 cm (21.85“ x 21.85” x 30.03“) (1)
  • Weight 44.5 Kg (98.1 lb)



  • Power handling 800 + 200 W
  • Impedance 8 Ω
  • Frequency range 120 Hz - 19 KHz
  • Maximum SPL 127 dB continuous - 133 dB peak


  • Horizontal 100°/30° (depending on horn orientation)
  • Vertical 30°/100° (depending on horn orientation)


  • Coaxial External Crossover required
  • Frequency High pass @ 120 Hz, 24 dB/oct suggested minimum


  • Full-range 12” neodymiun magnet woofer with 3” voice coil
  • Neodymium magnet compression driver with 2”voice coil

Power Audio Imput

  • Connectors 2 x 4-pin Speakon
  • Wiring 1+ 1- (Signal IN & LINK ) 2+ 2- (Through)

Recommended Amplifiers

  • Type KMT18, KMT21, KMT218, KA84

Physical Overview

  • Dimensions 34.0 x 32.0 x 20.0 cm (13.38”x 12.59”x 7.87”) (1)
  • Weight 12.2 Kg (26.89 lb)
  • Notes for data:

    1. ( W x H x D)

    New materials and design are introduced into existing products without previous notice. Present systems may differ in some respects from those presented in this catalogue.

Customers Applications

Axle-KRX402 can be successfully used in a range of different settings and events.

Discover all the projects where Axle-KRX402 products have been used