Martin 18" SX Subwoofer MARINE grade BLACK
- check Trusted New Zealand audio supplier
- check Fast nationwide shipping
- check Expert advice & installation support available
100% Secure Checkout
Guaranteed Secure
DESCRIPTION
Martin Audio delivers robust low-frequency performance for demanding outdoor and harsh-environment installations with the SX118 Marine Grade subwoofer. Purpose-built for permanent installation in moisture-rich, salt-air, and weather-exposed environments, this single 18" direct-radiating subwoofer combines powerful bass extension with exceptional long-term durability.
The Marine grade specification features a fully treated marine-grade birch plywood enclosure, weather-resistant polyurethane coating in black, stainless steel grille and hardware, and sealed connectors â ensuring reliable operation in coastal venues, cruise ships, waterparks, resort complexes, and outdoor entertainment spaces where standard cabinets would quickly deteriorate.
- Single 18" long-excursion driver delivering deep, controlled low-frequency output
- Marine-grade birch plywood enclosure with weather-resistant black finish
- Stainless steel grille and fixings resistant to corrosion and salt-air degradation
- Compact, direct-radiating design for flexible integration into permanent installations
- High power handling suited to demanding commercial and entertainment applications
- Optimised for use with Martin Audio SX series full-range installation loudspeakers
Ideal for integrators and installers specifying subwoofer solutions where environmental resilience is non-negotiable, the SX118 Marine Grade delivers the consistent, high-impact bass performance expected from Martin Audio â engineered to endure where others fail.
SHIPPING INFO
RETURNS & WARRANTY
Frequently Asked Questions
Everything you need to know about our products, ordering and services.

