Martin Audio SXP218 – 2x18" Powered Portable Subwoofer (Black)
Martin Audio SXP218 – 2x18" Powered Portable Subwoofer (Black) is backordered and will ship as soon as it is back in stock.
Shipping Availability*
Shipping Availability*
Free Ground Shipping on Most Orders Over $250.00
Looking for the best price or expert advice? Give us a call at 1-888-230-3661 or use the Live Chat below. Buying 1 or 100, you may qualify for greater savings beyond the advertised price.
Martin Audio SXP218 – 2x18" Powered Portable Subwoofer (Black)
Product Overview
The Martin Audio SXP218 is a dual-driver self-amplified powered portable subwoofer delivering 143dB peak SPL at 1 metre from dual 18" (460mm) long-excursion drivers with onboard Class D amplification, DSP processing, and Dante digital audio networking. Operating across 35Hz–150Hz (±3dB), it is the highest-output powered subwoofer in the Martin Audio SX Series, suited to the most demanding touring sound reinforcement, theatre, outdoor live events, and premium permanent installations requiring maximum self-contained LF output with low distortion. Global mains operation with Power Factor Correction supports international deployment, and the IP24 rating with optional rain cowl enables outdoor use.
Product Description
The SXP218 delivers dual-18" powered subwoofer performance at the level required for large-scale touring and premium live event productions. Dual 18" (460mm)/4" (100mm) voice coil long-excursion drivers with water-resistant cones and triple roll surrounds in a compact reflex enclosure with eight large-frontal-area ports minimise turbulent air noise at very high drive levels. The driver design maximises output while minimising power compression and distortion, with the SXP218 achieving 143dB peak SPL at 1 metre from a self-contained powered enclosure. Onboard Class D amplification provides the power density required for dual-18" drive without external amplifier infrastructure. Onboard DSP handles system alignment, crossover, and driver protection, enabling plug-and-play deployment alongside CDD-LIVE! full-range systems. Dante digital audio networking enables IP audio connection directly from Dante-enabled consoles and processors, eliminating signal conversion hardware in networked AV environments. Global mains supply with Power Factor Correction supports operation across international power infrastructure. IP24 rating with an optional rain cowl extends deployment to outdoor festival, stadium, and entertainment venue environments. Tour-grade plywood construction with flying inserts supports both portable touring and permanent installation contexts.
Key Features
- Dual-Driver Powered Subwoofer — Two 18" drivers with onboard Class D amplification in a self-contained unit.
- 143dB Peak SPL at 1m — Highest output powered subwoofer in the SX Series for the most demanding live sound applications.
- 35Hz–150Hz Operating Range — Extended LF response for full sub-bass programme reproduction.
- Onboard DSP — Integrated processing for alignment, crossover, and driver protection without external rack equipment.
- Dante Digital Audio Networking — IP audio from Dante-enabled sources without additional converters.
- IP24 Rating with Rain Cowl Option — Outdoor and semi-exposed deployment capability.
- Global Mains with Power Factor Correction — International touring compatibility.
- Tour-Grade Plywood Enclosure with Flying Inserts — Portable and permanent installation deployment.
Typical Applications
- Large-scale touring sound reinforcement requiring maximum self-contained LF output
- Theatre sound reinforcement with powered dual-18" LF systems
- Outdoor festival LF reinforcement with IP24 weatherproofing
- Corporate AV events demanding high LF headroom from powered systems
- House of worship large-venue powered LF reinforcement
- Premium permanent installations in concert halls and ballrooms with Dante networking infrastructure
Technical Specifications
| Type | Dual-driver self-powered subwoofer |
| Drivers | 2 x 18" (460mm) / 4" (100mm) voice coil, water-resistant cones, triple roll surrounds |
| Frequency Response | 35Hz–150Hz (±3dB) |
| Maximum SPL | 143dB peak at 1 metre |
| Amplification | Onboard Class D |
| DSP | Onboard integrated |
| Networking | Dante digital audio |
| Ports | 8 large-frontal-area reflex ports for reduced air noise |
| Mains | Global with Power Factor Correction |
| IP Rating | IP24 (with rain cowl option) |
| Enclosure | Tour-grade plywood with flying inserts |
| Finish | Black |
Frequently Asked Questions
- Is the SXP218 a powered or passive subwoofer?
- The SXP218 is a powered (self-amplified) subwoofer with onboard Class D amplification and DSP. No external amplifier or DSP processor is required.
- How does the SXP218 differ from the SXP118B?
- The SXP218 adds a second 18" driver, increasing peak SPL from 135dB to 143dB and extending the LF operating range to 35Hz, at the cost of a larger and heavier enclosure. It is the choice when maximum powered LF output is the primary design criterion.
- Does the SXP218 support Dante networking?
- Yes. Dante digital audio networking is built in, enabling direct IP audio connection from Dante-enabled consoles and processors without additional converter hardware.
- Can the SXP218 be used outdoors?
- Yes. With the optional rain cowl the SXP218 achieves IP24 weatherproofing for outdoor festival, stadium, and entertainment venue deployment.
- What systems does the SXP218 partner with?
- The SXP218 is designed as the LF partner for Martin Audio CDD-LIVE! full-range systems in touring and theatre applications, and for use in premium permanent installations requiring Dante-enabled powered LF reinforcement.
- Where can I view the full Martin Audio SX powered subwoofer range?
- Visit creationnetworks.net/collections/martin-audio for the complete SX Series lineup.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
CREATION NETWORKS — A PARTNER YOU CAN TRUST SINCE 2006
