K-Array Thunder KS1P I – Passive 12-Inch Subwoofer (Black)

Product Overview

The K-Array Thunder KS1P I is a compact passive 12-inch subwoofer built for commercial AV installations that need controlled low-frequency reinforcement from the smallest practical cabinet. This 8-ohm installation subwoofer produces 134 dB maximum SPL with extension down to 35 Hz, making it the standard bass companion for column array systems in conference rooms, houses of worship, and multi-purpose rooms. At just 18 kg, it is one of the lightest 12-inch passive subwoofers available for commercial deployment, simplifying both fixed installation and portable use. This is the black finish; a white KS1PW I version is also available.

Product Description

The KS1P I houses a long-excursion 12-inch neodymium magnet woofer with a 3-inch voice coil, delivering response from 35 Hz to a crossover-dependent 150/450 Hz upper limit — that wide upper range gives integrators real flexibility when crossing over to compact column elements or satellite speakers. The 500 x 350 x 440 mm polyurea-coated birch plywood enclosure resists impacts and wear through years of installed or production duty, and the 39.7 lb weight allows single-person handling during installation. Two SpeakON NL4 connectors accept 2-wire or 4-wire signal from external amplifiers and pass it through to additional loudspeakers for clean daisy-chained wiring. As a passive design rated for 1200 W peak, the KS1P I keeps all amplification and DSP centralized at the rack, where K-Array Kommander amplifiers apply the dedicated low-pass presets required for proper system integration. The KS1P I is the factory-matched subwoofer inside Pinnacle KR102 II column array systems, and projects needing deeper extension can step up to the 18-inch Thunder KS2P I.

Key Features

• 12-Inch Neodymium Woofer — A long-excursion 12" driver with 3" voice coil reaches down to 35 Hz for genuine low-frequency support in small and mid-size commercial venues.
• 134 dB Maximum SPL — Strong single-cabinet output handles speech reinforcement, presentations, and music playback without strain.
• Ultra-Light 18 kg Cabinet — Neodymium magnetics keep the subwoofer at 39.7 lb, allowing one-person positioning during installation and reducing structural load in suspended or concealed placements.
• 8-Ohm Impedance for Flexible Loading — Two KS1P I cabinets can run in parallel on one 4-ohm amplifier channel, saving rack space and amplifier cost in dual-subwoofer designs.
• 1200 W Peak Power Handling — The passive design accepts professional installation amplification while keeping all electronics serviceable at the rack.
• Wide Crossover Range — External DSP low-pass settings from 150 Hz up to 450 Hz give system designers latitude when pairing with compact column and satellite elements.
• Dual SpeakON NL4 Connectivity — Two NL4 connectors accept 2-wire or 4-wire input and route signal through to other loudspeakers for tidy daisy-chained wiring.
• Polyurea-Coated Birch Plywood Enclosure — The coated cabinet resists scuffs and impacts across years of fixed or portable service, with Custom RAL finishes available for architectural integration.

Typical Applications

• Houses of worship adding bass support beneath column arrays
• Conference rooms and boardrooms with music and program playback
• Multi-purpose rooms alternating between speech and full-range content
• All-hands rooms and commercial meeting spaces with video presentations
• Auditoriums and training rooms needing compact, concealable low-frequency reinforcement
• Government spaces requiring discreet installed audio

Technical Specifications

Frequently Asked Questions

Which amplifier should drive the Thunder KS1P I?

The KS1P I is passive and requires external amplification rated for an 8-ohm load with up to 1200 W peak handling. K-Array Kommander amplifiers are the recommended match because their dedicated DSP presets manage the low-pass crossover, though any professional amplifier with suitable power and processing can drive it.

Can I run two KS1P I cabinets on one amplifier channel?

Yes. The 8-ohm nominal impedance allows two cabinets in parallel to present a 4-ohm load, which most professional installation amplifiers drive comfortably — a common approach for left-right subwoofer placement.

Which K-Array systems pair with the KS1P I?

The KS1P I is the matched subwoofer in Pinnacle KR102 II column array systems and pairs with K-Array column elements crossed over via Kommander DSP presets. Browse companion products in the K-Array collection.

Is the KS1P I suitable for permanent installation?

Yes. The polyurea-coated birch plywood enclosure and Custom RAL finish options are designed for fixed commercial installations as well as portable production use, and the 18 kg weight simplifies mounting.

Does it integrate with AV control systems?

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

What warranty applies?

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