Martin Audio SXP118B – 18" Powered Portable Subwoofer (Black)

Product Overview

The Martin Audio SXP118B is a compact, self-amplified 18" powered portable subwoofer combining onboard Class D amplification, DSP processing, and Dante digital audio networking with a high-performance 18" (460mm) long-excursion driver. It extends the low-frequency operating range of a CDD-LIVE! full-range system to 40Hz with a maximum SPL of 135dB peak at 1 metre, making it well-suited to theatre sound, portable live sound reinforcement, corporate AV events, and premium installations requiring maximum LF output from a self-contained compact enclosure. IP24 rating with an optional rain cowl supports outdoor deployment.

Product Description

The SXP118B is the single-driver 18" powered subwoofer in the Martin Audio SX Series, designed to eliminate the need for a separate power amplifier and DSP rack unit while delivering professional-grade LF performance for CDD-LIVE! portable and install systems. Onboard Class D amplification and DSP provide the processing necessary for system alignment, crossover management, and driver protection within a single self-contained unit. Dante digital audio networking enables direct IP audio connection from Dante-enabled consoles, processors, and sources — eliminating additional signal conversion hardware in networking-enabled AV environments. The 18" (460mm)/4" (100mm) voice coil driver features a water-resistant cone with a triple roll surround in a compact reflex enclosure with four large-frontal-area ports to minimise turbulent air noise at high drive levels. The driver design maximises output while minimising power compression and distortion, maintaining 135dB peak SPL at 1 metre with low harmonic content. Global mains operation with Power Factor Correction supports international touring and deployment across power infrastructure variants. IP24 rating with an optional rain cowl extends deployment to outdoor and semi-exposed environments. Tour-grade plywood construction with flying inserts supports both portable and permanent installation deployment.

Key Features

• Self-Amplified Powered Subwoofer — Onboard Class D amplification eliminates external amplifier requirements.
• Onboard DSP — Integrated processing for system alignment, crossover management, and driver protection.
• Dante Digital Audio Networking — IP audio connectivity from Dante-enabled consoles and processors without additional converters.
• 135dB Peak SPL at 1m — High output from a compact self-contained powered enclosure.
• 18" Long-Excursion Driver — 460mm/4" voice coil driver with water-resistant cone and triple roll surround for extended LF to 40Hz.
• IP24 Rating with Rain Cowl Option — Supports outdoor and semi-exposed deployment.
• Global Mains Operation with Power Factor Correction — International touring compatibility across varied power infrastructure.
• Tour-Grade Plywood Enclosure with Flying Inserts — Portable and permanent installation deployment capability.

Typical Applications

• Theatre sound reinforcement with self-contained powered LF systems
• Portable live sound reinforcement for corporate AV events and concerts
• House of worship powered LF reinforcement
• Outdoor entertainment with IP24-rated powered LF
• Premium fixed installations in concert halls and ballrooms requiring Dante networking
• Broadcast studio LF reinforcement

Technical Specifications

Frequently Asked Questions

Is the SXP118B a powered or passive subwoofer?

The SXP118B is a powered (self-amplified) subwoofer with onboard Class D amplification and DSP. No external amplifier or DSP processor is required.

What is Dante audio networking and why is it relevant?

Dante is an IP-based digital audio networking protocol. The SXP118B's Dante input enables direct audio connection from Dante-enabled mixing consoles, processors, and AVoIP infrastructure without additional converter hardware, simplifying cabling in networked AV installations.

Can the SXP118B be used outdoors?

Yes. With the optional rain cowl the SXP118B achieves IP24 weatherproofing, making it suitable for outdoor and semi-exposed entertainment environments.

What systems does the SXP118B partner with?

The SXP118B is designed as the LF partner for Martin Audio CDD-LIVE! full-range systems in portable live sound and theatre applications, extending the system to 40Hz.

Is a dual-18" powered version available?

Yes. The SXP218 is the dual-18" powered subwoofer variant for higher output applications.

What countries does the global mains operation support?

The SXP118B's global mains supply with Power Factor Correction is compatible with power infrastructure voltages across North America, Europe, and international touring markets.

Where can I view the full Martin Audio SX powered subwoofer range?

Visit creationnetworks.net/collections/martin-audio for the complete SX Series lineup.