Martin Audio SXHF218 – 2x18" Passive Hybrid Horn/Reflex Flown Subwoofer

Product Overview

The Martin Audio SXHF218 is the flown variant of the SXH218, an extremely powerful passive subwoofer capable of producing 148dB peak output at 1 metre through Martin Audio's Hybrid Horn/Reflex loading technology. Designed as the rigged LF partner for Wavefront Precision WPL line arrays, the SXHF218 delivers maximum LF output from a flyable enclosure for large-scale outdoor festivals, stadiums, arenas, concert halls, and premium live event venues where both extreme output and rigged deployment are required simultaneously.

Product Description

The SXHF218 is essentially the rigged version of the SXH218, implementing Martin Audio's Hybrid Horn/Reflex technology in a flyable enclosure optimised for integration within WPL Wavefront Precision line array configurations. Hybrid Horn/Reflex loading combines horn and reflex mechanisms within a single enclosure to achieve acoustic efficiency and low-frequency extension that neither approach alone can match — yielding 148dB peak SPL at 1 metre from a flyable passive subwoofer. Dual 18" (460mm) long-excursion neodymium drivers with 4.5" (115mm) voice coils provide the motor force required to drive the Hybrid loading system at extreme output levels. Forward or rear-facing operation options provide system designers with configuration flexibility for rigged LF deployments. The SXHF218 is the appropriate selection for large-scale live event productions, outdoor festivals, and large permanent installations where the LF subsystem must be flown within a WPL line array configuration and maximum output performance is the primary design criterion. For ground-stack Hybrid Horn/Reflex deployment, the SXH218 is the companion product.

Key Features

• Hybrid Horn/Reflex Flown Subwoofer — Rigged variant of the SXH218, optimised for WPL line array integration.
• 148dB Peak SPL at 1m — Maximum output from a flyable passive subwoofer in the SX Series.
• Dual 18" Neodymium Drivers — 460mm drivers with 4.5" voice coils provide the motor force for extreme output Hybrid loading.
• Hybrid Horn/Reflex Loading — Proprietary loading technology achieves higher efficiency and LF extension than direct-radiating alternatives.
• Forward or Rear-Facing Operation — Configuration flexibility for rigged LF deployments.
• Ultra-High Output Flown Subwoofer — For large outdoor events, stadiums, and concert halls requiring maximum rigged LF performance.

Typical Applications

• Outdoor festival rigged LF systems requiring maximum output
• Stadiums and arenas with flown WPL line array systems
• Concert halls and large theatre flown LF reinforcement
• Large-scale live event productions requiring rigged cardioid or maximum-output LF arrays
• Premium permanent venue installations with WPL line array systems

Technical Specifications

Frequently Asked Questions

What is the difference between the SXHF218 and the SXH218?

The SXHF218 is the rigged flown variant optimised for integration within WPL line array configurations. The SXH218 is the ground-stack variant. Both use identical Hybrid Horn/Reflex loading and achieve the same 148dB peak SPL.

Is the SXHF218 a passive or powered subwoofer?

The SXHF218 is a passive subwoofer requiring an external high-power amplifier and DSP processor.

What is Hybrid Horn/Reflex technology?

Martin Audio's Hybrid Horn/Reflex technology combines horn and reflex loading in a single enclosure, achieving higher acoustic efficiency and greater LF extension than direct-radiating designs, enabling the extreme 148dB peak output the SXHF218 produces.

What line array systems does the SXHF218 integrate with?

The SXHF218 is designed as the flown LF partner for Martin Audio WPL Wavefront Precision series arrays in large-venue touring and permanent installation contexts.

Where can I view the full Martin Audio SX range?

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