SUBWOOFER
Rumble-KU44 I

The Rumble-KU44 I is an ultra-compact passive subwoofer designed to deliver precise and controlled low-frequency reinforcement in refined audio systems, invisible sound systems, and multi-zone sound systems, where powerful bass must integrate seamlessly with architecture and design.

Crafted from stainless steel, the Rumble-KU44 I combines durability, elegance, and an exceptionally slim profile. It is ideal for installations requiring discreet low-frequency support in retail store sound systems, hospitality venues, galleries, and residential audio systems. The enclosure houses two 4" neodymium magnet woofers paired with two 4" passive radiators, delivering extended bass performance with a 45 Hz – 150 / 500 Hz (-6 dB) frequency response and up to 116 dB peak SPL, all within a compact architectural format.

With 8 Ω / 32 Ω selectable impedance and a 4-pin Euroblock connector, the KU44 I integrates easily into distributed audio systems. A dedicated preset ensures optimal performance when powered by K-array amplifiers, enabling clean and controlled low-frequency reproduction in multi-zone systems, high-end installations, and design-driven audio environments.

For full-range performance, the Rumble-KU44 I pairs perfectly with compact mid-high loudspeakers such as the Vyper or KZ14, completing a discreet and high-resolution audio solution.

Available finishes:
• Black • White • Custom RAL • Custom Finishes

Marine Version

Stainless steel construction with enhanced anti-corrosion treatments and IP64 rating, with additional water protection available via the K-KUIP4 accessory, ensuring reliable operation in demanding outdoor and marine environments.

Ideal for:
Yachts, Cruise ships, Beach clubs, Outdoor installations