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BASSBOSS Kraken-MK3 Quad 21" Powered Sub

Q&A SKU #M01798000000000
17995.0 $17,995.00
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21" powered subwoofer with excellent transient response.

The BASSBOSS Kraken-MK3 quad 21" active subwoofer offers intense bass extension down to 25Hz, extreme output and an incredible footprint to output ratio. The output of four to five BASSBOSS double 21" subs has been packed into a cabinet roughly the size of just two. The Kraken-MK3 delivers excellent transient response and efficiency, with extended depth and prodigious power.

The amplifiers and DSP feature powerful 96kHz processors with pristine sound quality and eight touch-of-a-button onboard presets. The state-of-the-art Class-D amplifier provides a true 10,000 watts of RMS power. The amplifier is truly capable of delivering continuous power, ensuring that it isn’t the limiting factor on your quest for low frequency. Control BASSBOSS software provides additional computer-accessible presets, networked remote control and remote DSP update capabilities. Each unit features dual ethernet ports with a built-in network switch for computer connectivity and cascading networking ability.

IP65 waterproof connectors provide peace-of-mind in unpredictable environments, and the MK3 line offers 90–250VAC global power compatibility for use all over the world. The four drivers are loaded into a large acoustical volume that is tuned to a low frequency, and each is front loaded onto a short horn. The vented enclosure section provides extended low-frequency performance, and the horn section provides increased upper-frequency sensitivity and improved transient response. Meticulously constructed from 18 mm Baltic birch plywood, while also using dado joints, screws, extensive bracing and advanced composite adhesives, ensures years and years of trouble-free service. The enclosures feature UHMW polyethylene sliders on all four sides, with corresponding recesses in the opposite sides to facilitate interlocking the boxes when stacked. The included transport carts also feature recesses that the feet lock into for secure transporting.

The amplifiers can deliver 10,000W of continuous output. This ensures the amps are not the limiting factor in the output of low frequencies. Providing abundant power prevents overheating issues and virtually eliminates the damage that clipping a too-small amp can cause. For larger events, several arraying options are available. Block arrays, side-by-side arrays and front/back cardioid arrays can be deployed securely thanks to the interlocking feet. Presets are included in the DSP.


  • Extreme output and an incredible footprint to output ratio
  • Excellent transient response and efficiency
  • 96kHz processors with pristine sound quality and onboard presets
  • IP65 waterproof connectors

Order the BASSBOSS Kraken-MK3 quad 21" powered subwoofer today.


Kraken-MK3 Quad 21" Powered Sub Specifications:

  • Frequency response (±3dB): 25–90Hz
  • Maximum sustained output: 145dB SPL, 1 meter, half-space (ground plane)
  • Max SPL (peak): 148dB
  • Nominal dispersion (H° x V°): 360 x 360, cardioid mode available with multiple boxes
  • Amplification: 10,000W continuous RMS Class-D, subwoofer-optimized
  • Processing: High and low pass, phase alignment, cardioid processing and limiting
  • Enclosure type: Vented, short-horn hybrid
  • Transducer: 4 x 21" diameter (540 mm) neodymium motor woofer with 58 mm (2.28") peak-to-peak excursion, waterproof fiber composite cone
  • Cabinet construction: 18 mm Baltic birch plywood, dado joints, stainless steel hardware
  • Dimensions vertical (HxWxD): 48" x 48" x 36" (49" high with feet)
  • Net weight: 479 lb.

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