K-Array Thunder KS3PW I – White Passive 21-Inch Subwoofer

Product Overview

The K-Array Thunder KS3PW I is a white passive 21-inch subwoofer for architectural AV installations where low-frequency hardware must disappear into bright interiors rather than dominate them. Identical in performance to the black KS3P I, this high SPL installation subwoofer reaches 139 dB with extension down to 30 Hz, anchoring column array and line array systems in houses of worship, auditoriums, and design-led commercial spaces. The 4-ohm passive architecture with 2800 W peak power handling supports centralized amplifier racks for clean, serviceable commercial deployment. Prefer dark finishes? The black KS3P I version is also available.

Product Description

In venues with white walls, light stonework, or contemporary architectural palettes, a black subwoofer cabinet draws the eye — the KS3PW I's factory white finish lets a 21-inch low-frequency cabinet sit against light surfaces without visual intrusion, and custom RAL colors are available for exact architectural matching. Inside, a long-excursion 21-inch neodymium magnet woofer with 4-inch voice coil delivers response from 30 Hz to a crossover-dependent 150/300 Hz upper limit. Neodymium magnetics keep the cabinet at 49.2 kg (108.5 lb), easing handling during integration, while the polyurea-coated birch plywood enclosure protects the finish through years of installed service. Two SpeakON NL4 connectors accept 2-wire or 4-wire amplifier signal and pass it through to additional loudspeakers for clean multi-cabinet wiring. K-Array Kommander amplifiers drive the cabinet with DSP presets that manage the 150 Hz low-pass crossover and align it with white K-Array column elements like Kayman and Python for a fully color-matched system. Integrators needing a smaller white cabinet can step down to the Thunder KS2PW I single-18.

Key Features

• Architectural White Finish — The factory white cabinet blends into light interiors and pairs with white K-Array columns for visually unified installations.
• 21-Inch Neodymium Woofer — A long-excursion 21" driver with 4" voice coil extends response down to 30 Hz for full-bandwidth reinforcement in large rooms.
• 139 dB Maximum SPL — High single-cabinet output maintains bass impact across auditoriums, worship spaces, and event programming.
• 2800 W Peak Power Handling at 4 Ohms — The passive 4-ohm load accepts high-output professional amplification from a centralized equipment rack.
• Dual SpeakON NL4 Connectivity — Two NL4 connectors accept 2-wire or 4-wire input and route signal onward to other loudspeakers for tidy daisy-chained wiring.
• DSP-Managed Crossover — Matched K-Array processing applies a preset-dependent 150 Hz low-pass for accurate integration with Kayman and Python columns.
• Ultra-Light for Its Class — Neodymium motors hold weight to 49.2 kg (108.5 lb), simplifying placement and rigging during commercial installation.
• Polyurea-Coated Birch Plywood Enclosure — The durable coating protects the white finish from scuffs and wear in active venues.
• Custom RAL Options — Beyond standard black and white, custom RAL finishes match the cabinet to any architectural color specification.

Typical Applications

• Houses of worship with light interiors requiring full-range music reproduction
• Auditoriums where white or custom-finish hardware must match the room design
• Multi-purpose rooms hosting speech events and high-energy program material
• All-hands rooms and commercial meeting spaces in design-forward corporate facilities
• Government spaces and civic venues with architectural finish requirements

Technical Specifications

Frequently Asked Questions

Which amplifier drives the Thunder KS3PW I?

The KS3PW I is passive and needs external amplification rated for a 4-ohm load with up to 2800 W peak handling. K-Array Kommander amplifiers are the recommended pairing because their DSP presets handle the low-pass crossover and system alignment.

Is the white finish suitable for high-traffic venues?

Yes. The white finish is applied over a polyurea-coated birch plywood enclosure designed to resist scuffs and impacts in permanent commercial installations.

Can I match the cabinet to a specific interior color?

K-Array offers custom RAL finishes in addition to standard black and white, so the cabinet can be ordered to match a precise architectural color specification.

How does it wire into a multi-cabinet system?

Two SpeakON NL4 connectors accept 2-wire or 4-wire amplifier signal and pass it through to additional loudspeakers, keeping daisy-chained subwoofer and column wiring clean.

Does it integrate with commercial control systems?

When powered by K-Array Kommander electronics, the system supports integration with Q-SYS, Crestron, Control4, and other control platforms, with Dante networking on supported amplifiers.

What warranty and support are included?

K-Array provides a 5-year manufacturer warranty, and Creation Networks supports the product as an authorized dealer. See companion white-finish elements in the K-Array collection.