K-Array Rumble KU315 – Ultra-Slim Passive Subwoofer (Black)

Product Overview

The K-Array Rumble KU315 is an ultra-slim passive subwoofer for commercial AV installations where conventional bass cabinets are too deep to conceal. At just 250 mm (9.8 in) deep, this low-profile installation subwoofer pairs a 15-inch neodymium woofer with two 15-inch passive radiators to deliver 137 dB peak SPL and 2000 W rated power at 4 ohms — the most powerful passive model in the Rumble series. Its water-resistant, marine-certified construction also makes it a weather-resistant outdoor subwoofer for exterior architectural AV integration. This is the black finish; a white KU315W version is also available.

Product Description

Most subwoofers with this much output need deep ported enclosures; the KU315 takes a different approach. Instead of reflex openings, two 15-inch passive radiators flank the active 15-inch neodymium transducer, keeping cone excursion linear with minimal residual noise while allowing a sealed, shallow cabinet only 250 mm deep. The 1230 x 450 mm face mounts against walls, under stages, behind scenery, or along architectural lines where a conventional cabinet would protrude into the room. Construction is water-resistant polyurea-coated birch plywood, certified for marine applications, so the same cabinet serves climate-controlled auditoriums, outdoor terraces, and waterfront venues. A SpeakON NL4 connector (1+/1-) accepts signal from external amplification. K-Array Kommander amplifiers are the recommended drive platform: dedicated presets balance the KU315 against any mid-high speaker in the K-Array catalog, giving integrators a complete matched system with response from 35 Hz to 150 Hz handled accurately at the crossover. For conventional-format rooms, compare the Thunder KS2P I 18-inch and Thunder KS3P I 21-inch passive subwoofers.

Key Features

• Ultra-Slim 250 mm Depth — The shallow cabinet mounts against walls, under stages, or along architectural lines where conventional subwoofers cannot fit.
• 15-Inch Woofer with Dual 15-Inch Passive Radiators — The radiator-loaded design keeps transducer excursion linear with minimal residual noise, replacing port turbulence with clean low-frequency output.
• 2000 W Rated Power at 4 Ohms — The highest-rated passive subwoofer in the Rumble series accepts serious professional amplification for full-scale commercial systems.
• 137 dB Peak SPL — Output capability supports medium and large-format venues despite the discreet form factor.
• Weather-Resistant, Marine-Certified Construction — Water-resistant polyurea-coated birch plywood is certified for marine applications, enabling outdoor and waterfront installations.
• SpeakON NL4 Connectivity — The locking professional connector accepts amplifier signal reliably in fixed installations.
• Matched Kommander Amplifier Presets — Dedicated DSP presets balance the KU315 against any K-Array mid-high speaker for a complete single-vendor system.
• Black, White, or Custom RAL Finishes — The KU315X variant supports any RAL color for box and grille to satisfy architectural specifications.

Typical Applications

• Auditoriums and performance venues needing concealed low-frequency reinforcement
• Houses of worship where bass cabinets must hide within architectural features
• Multi-purpose rooms with limited depth for loudspeaker placement
• Commercial meeting spaces and all-hands rooms requiring discreet full-range sound
• Government spaces and civic venues with strict aesthetic and placement constraints

Technical Specifications

Frequently Asked Questions

Which amplifier should drive the Rumble KU315?

The KU315 is passive and requires external amplification capable of driving a 4-ohm load at up to 2000 W. K-Array Kommander amplifiers are the recommended choice because they include dedicated KU315 presets that handle crossover and alignment against K-Array mid-high speakers.

Can the KU315 be installed outdoors?

Yes. The water-resistant polyurea-coated birch plywood construction is certified for marine applications, making the cabinet suitable for outdoor terraces, courtyards, and waterfront venues when installed per K-Array guidelines.

Why does it use passive radiators instead of ports?

The two 15-inch passive radiators replace reflex openings, keeping transducer excursion linear with minimal residual noise. This allows a sealed, shallow cabinet that delivers deep output without port turbulence — and keeps weather out in exterior installations.

How shallow is the cabinet?

The KU315 measures 1230 x 450 x 250 mm (48.4 x 17.7 x 9.8 in), so it conceals under stages, against walls, or within architectural features where standard subwoofers cannot fit.

Which K-Array speakers pair with it?

Kommander presets match the KU315 to any mid-high speaker in the K-Array catalog, including Kayman, Kobra, and Python columns. See companion elements in the K-Array collection.

What warranty applies?

K-Array products carry a 5-year manufacturer warranty, supported by Creation Networks as an authorized dealer with system design assistance.