Martin Audio SX118+ Compact Direct Radiating Subwoofer — specification sheet
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Martin Audio · SX118+ · Speakers

Martin Audio SX118+ Compact Direct Radiating Subwoofer

Martin Audio SX118+ Compact Direct Radiating Subwoofer

The Martin Audio SX118+ is a compact, direct-radiating subwoofer designed for high-output audio reinforcement. Featuring an 18-inch driver and 6000W peak power handling, it delivers up to 137dB peak SPL with omni-directional or cardioid dispersion options. Procure.ae supplies this professional audio equipment across the UAE for venues and installations.

This subwoofer utilizes an 18-inch (460 mm) driver with a 4-inch aluminium voice coil to achieve 99.5 dB sensitivity. It handles 1500W AES power, reaching a maximum SPL of 137dB peak within a frequency response range of 38Hz to 100Hz ±3dB. The enclosure is constructed from multi-laminate birch ply with protective stainless steel grilles and IP21 rating for durability in various environments.

The SX118+ supports omni-directional or cardioid dispersion when paired, making it suitable for touring sound reinforcement and fixed installations in concert halls. It features three NLT4MPXX-BAG connectors for reliable signal linking and includes mounting points with two base skids for transport. Recommended amplifiers include the iK41, iK42, and iK81 models to ensure optimal performance.

Type
Compact direct radiating reflex-loaded subwoofer
Weight
49.2 kg (109 lbs)

Key features

01
High Power Output
Delivers 6000W peak power handling with a maximum SPL of 137dB for impactful low-frequency reinforcement.
02
Versatile Dispersion
Provides omni-directional coverage or cardioid dispersion when paired to control sound projection effectively.
03
Durable Construction
Built with multi-laminate birch ply enclosure, waterproof cone, and perforated stainless steel protective grilles.
04
Professional Connectivity
Features three NLT4MPXX-BAG connectors for secure input and linked output connections in professional setups.
05
Flexible Mounting
Includes 20x M10/M20 top-mounted threads and base skids with mating channels for easy installation and transport.

Specifications

General
ModelSX118+
TypeCompact direct radiating reflex-loaded subwoofer
Audio
Frequency Response38Hz – 100Hz ±3dB, -10dB @ 31Hz
Impedance8 ohms
Max SPL131dB continuous, 137dB peak
Polar PatternOmni-directional or cardioid when paired
Sensitivity99.5 dB
Speaker Size18 in (460 mm)
Connectivity
Connector Type3 x NLT4MPXX-BAG (one front, two rear)
Power
Power Capacity (W)1500W AES, 6000W peak
Physical
Dimensions650 mm W x 603 mm H x 635 mm D
FinishTextured black or white paint
MaterialMulti-laminate birch ply enclosure, aluminium voice coil
Weight49.2 kg (109 lbs)
Compliance
IP RatingIP21
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This sheet is compiled from the product data held on procure.ae. For fully accurate and up-to-date figures, always refer to the manufacturer’s own specification sheet or datasheet for this model.

Specifications are provided by the manufacturer and may change without notice.

Pricing is quote-based. Contact Procure for current pricing and availability.

Delivery across the UAE and beyond, installation on request and manufacturer-backed warranty.

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