Martin Audio SXP218 Subwoofer

Martin Audio SXP218 Subwoofer delivers the ultimate bass experience to any professional performance space. Robust design, deep and powerful sound, and absolute stability help SXP218 become the “heart” of stage, hall and large event sound systems. This is the ideal choice for those looking for a balance between performance, durability and British sound quality.

General introduction to Martin Audio SXP218 subwoofer

Martin Audio SXP218 Subwoofer is an active subwoofer solution (self-powered subwoofer) designed to optimally coordinate with full-range or line array speakers, providing deep, powerful and stable bass for stage, hall or touring sound systems. Martin Audio SXP218 Combining built-in Class D technology, advanced DSP processing, Dante™ digital audio networking, and high-quality construction materials, ensures outstanding audio performance in a wide range of environments and weather conditions.

Outstanding product specifications:

• Drivers: 2 x 18” (460 mm), with 4” (100 mm) voice coil
• Output capabilities: Very high peak power, meeting the needs of strong bass range
• Integrated amplifier: High efficiency, energy-optimized Class D
• Internal signal processing: Built-in DSP, allows PEQ, crossover, limiter adjustment
• Digital audio network: Dante™ support, for signal transmission over IP networks
• Sources: Supports global voltage, features power factor correction (PFC)
• Shell structure: Tour-grade plywood with bay mount inserts
• Weather protection options: IP24 version with rain hood

Review of the outstanding features and characteristics of the Martin Audio SXP218 Subwoofer

As one of the high-end subwoofer lines from the famous audio brand Martin Audio (UK), SXP218 is designed specifically for professional sound systems that require deep, powerful and absolutely stable bass.

Maximum performance with high-power dual 18-inch speaker design

Sub Martin Audio SXP218 Equipped with two 18 inch (460mm) speakers, 4 inch (100mm) voice coil for deep bass reproduction down to 30Hz.

Dual-driver construction significantly increases sound pressure level (SPL) without distortion, delivering clear, rich, and powerful bass even at high volumes.

This design is especially suitable for outdoor spaces or large stages, where bass is required to have force and far-reaching dispersion.

Class D amplifier with built-in DSP – high power and precision

Unlike passive subwoofers, Sub Martin Audio SXP218 is a self-powered subwoofer, using a high-performance Class D amplifier, integrated DSP digital signal processor.

The 96kHz DSP system allows users to precisely customize EQ, crossover, limiter and delay parameters, helping to perfectly synchronize the sound with other Martin Audio speakers in the system.

Thanks to Power Factor Correction (PFC) technology, the amplifier maintains stable performance even when operating at different voltage ranges (85V – 240V), minimizing distortion and background noise during long-term operation.

Dante™ audio networking integration – flexible solutions for modern systems

One of the highlights of Martin Audio SXP218 is Dante™ AES67 connectivity support, allowing digital audio signals to be transmitted over IP networks without the need for traditional analog signal cables.

This delivers extremely low latency, consistent signal quality, and makes installations more compact and flexible — especially useful when deploying large systems such as line arrays or event sound.

Users can also monitor, control, and configure speakers remotely via Martin Audio VU-NET software, making managing the entire system easier than ever.

Durable wooden barrel structure – professional touring standard

The entire shell Sub Martin Audio SXP218 Made from multi-layer tour-grade plywood, ensuring high mechanical strength and absolute vibration resistance when transmitting high power.

The speaker edges are reinforced with metal handles, non-slip rubber feet, and have flying inserts to aid in hanging or cabinet mounting.

In particular, the SXP218-W (Weatherized) version meets IP24 standards, has a rainproof hood - allowing safe use in harsh weather conditions, suitable for outdoor stages, music festivals or mobile events.

Huge output capability – meets the needs of large-scale bass

Thanks to a powerful Class D amplifier system and two high-power drivers, Martin Audio SXP218 can reach a maximum sound pressure level (SPL) of over 145 dB, far exceeding many models in the same segment.

The frequency response range of 30Hz – 150Hz helps the speaker reproduce the entire subwoofer region powerfully, suitable as the foundation for professional line arrays or PA systems.

When combined with full-range speakers such as the Martin Audio WPC, WPM or CDD-LIVE, the system achieves perfect acoustic balance, delivering a lively, deep and natural listening experience.

Easy to combine and expand the system

Sub Martin Audio SXP218 Can be paralleled or stacked to expand bass output depending on stage size.
Users can choose cardioid or end-fire configurations to control bass directionality and reduce backstage reflections – important in closed spaces or highly reflective halls.

Flexible application in many professional audio environments

Martin Audio SXP218 Subwoofer widely used in:

• Stage sound system - outdoor events
• Great hall, theater, performance center
• High-class clubs, bars, lounges
• Professional touring or concert line array system
• Fixed installation for gymnasiums, shopping malls, amusement parks

Thanks to its extremely powerful output – detailed sound – high durability, Sub Martin Audio SXP218 Always the top choice of international sound engineers and major event organizers.

Where to buy Martin Audio SXP218 cheap, genuine, high quality?

If you are looking for where to buy Martin Audio SXP218 subwoofer genuine, good price and professional service, then Phuc Truong Audio is the top choice in Ho Chi Minh City. As an authorized distributor of genuine Martin Audio audio equipment, Phuc Truong Audio Committed to providing customers with international standard products, full warranty, and the most competitive prices on the market.

In particular, our team of specialized technicians Phuc Truong Audio Always support consulting on suitable combination solutions, on-site construction and installation, and standard sound calibration to Martin Audio SXP218 fully utilize its power in every space. Whether you need a line array system for a stage, a large hall, or a sub system for a high-end bar or club, Phuc Truong Audio Always ensure optimal quality - aesthetics - performance, bringing the most powerful, classy and professional bass experience.

Martin Audio SXP218 Frequently Asked Questions

Can the Martin Audio SXP218 Subwoofer be used in a karaoke room or small club?

Yes, but you should limit the power and place it properly to avoid excess bass. In a closed room, the SXP218 gives a thick and strong bass, suitable for clubs, lounges or VIP karaoke rooms. If the space is less than 30m², you can refer to Martin Audio SX110 or Martin Audio SX112 Subwoofer – Sub series is more compact but still powerful.

Should I pair the iK81 amplifier with the SX218 or use the SXP218 actively?

If you want flexibility, the SXP218 has built-in ampli is a neat solution, no need amplifier outside.

Can this system be connected to a digital karaoke mixer?

Absolutely. Use it. JBL VX9 digital echo, E3 S7 digital mixer – has compatible XLR Balance port, helps control smooth voice tone, tight and solid bass.

Is the Martin Audio SXP218 Sub compatible with wireless microphones?

Yes, because the sub operates in the audio frequency range, it does not affect RF waves. However, if you set up a karaoke system, you should choose wireless microphones UHF Ktreasure G600 or Eudac SKM 90 to ensure stable signal.