Rumble-KU44 I

The Rumble-KU44 is an ultra-compact, arrayable bass element designed to complement mid-high speakers, delivering a full-range frequency response with impressive output in a nearly invisible profile. This subwoofer features a frequency range of 50 Hz to 150 Hz and integrates two 4” neodymium transducers with two 4” passive radiators for optimal linear excursion and minimal residual noise.

Flexible Impedance & Seamless Integration

For effortless integration with K-array KA amplifiers, the KU44 allows users to select between 8Ω and 32Ω. At 32Ω, up to eight units can be powered from a single 4Ω amp channel. Using the dedicated presets, K-array Kommander amplifiers ensure perfect balance and seamless pairing with any mid-high speaker in the K-array catalog.

Durable & Weather-Resistant

Constructed entirely of stainless steel, the KU44 is built for durability, even in challenging outdoor environments. It is ideal for marine applications where conventional bass speakers would corrode. The optional MARINE version offers enhanced protection against salt corrosion.

Versatile Installation

With a range of dedicated mounting accessories, the KU44 is perfect for retail spaces, restaurants, hotels, bars, museums, and any environment where an invisible bass solution is required. Installing a KU44 line array beside or behind a Kobra line array extends the full-range response down to 50 Hz, ensuring a uniform and immersive sound experience.

Available Models

• KU44 I: Standard black model
• KU44W I: Standard white model
• KU44X I: Customizable color and finish (box + grille)
• KU44-2 I, KU44W-2 I, KU44X-2 I: 2Ω version
• KU44M I, KU44MW I, KU44MX I: Marine-treated version (only RAL colors)
• KU44M-2 I, KU44MW-2 I, KU44MX-2 I: 2Ω version with Marine Treatment (only RAL colors)

Specifications

• Type: Passive subwoofer
• Transducers: 2 x 4" neodymium magnet woofers, 2 x 4" passive radiators
• Frequency Response: 45 Hz - 150 / 500 Hz (-6 dB) (1)
• Max SPL: 116 dB (peak) (2)
• Rated Power: 120 W
• Coverage: Omnidirectional
• 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
• Colors: Black, White, Custom RAL
• Finishes: 24K Gold, Polished, Brushed

Regulations

• IP Rating: IP64 (4)

(1) With dedicated preset

(2) Maximum SPL is calculated using a signal with crest factor 4 (12 dB) measured at 1 m.

(3) Removable rubber feet not included in the measurements.

(4) Enhanced water protection available with the K-KUIP4 accessory.

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

New materials and designs may be introduced into existing products without prior notice.

Documents 

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