Sub Martin Audio SXC118

The Martin Audio SXC118 is a premium cardioid subwoofer designed for performance venues that require powerful bass, good directional control, and low distortion. The SXC118 delivers a “solid, deep, precise” sound experience — meeting the needs of professional stage, bar, club, and touring sound systems.

Introducing the Martin Audio SXC118 Subwoofer

The Martin Audio SXC118 is a cardioid subwoofer that uses dual-driver technology with two drivers positioned in opposite directions to create a precise cardioid dispersion pattern. This increases frontal sound pressure while reducing rear reflections – a key factor in controlling the bass stage.

Technical parameters of the product to consider:

• Speaker structure: Dual contra-directional driver design – one 18” (460mm) forward-facing 4” (100mm) voice coil driver and one 14” (356mm) rear-facing 3,5” (88mm) voice coil driver.
• Dispersion pattern: Cardioid pattern – allows for precise bass directivity, 28dB reduction at 75Hz rear, optimal performance on stage or in a closed hall.
• Power & Performance: High output performance, extremely deep and stable bass range, good response under continuous operating conditions.
• Speaker box material: Tour-grade plywood enclosure – ensures durability, vibration resistance, high load capacity and meets flying insert installation standards for line array or ground stack systems.

Outstanding features of Martin Audio SXC118 Subwoofer

The Martin Audio SXC118 is a premium subwoofer in the professional touring segment, designed with a cardioid dispersion pattern - providing precise bass direction control, minimizing stage noise and enhancing the overall listening experience.

The product demonstrates the design philosophy of “Sound Reinforcement with Clarity and Control” of the Martin Audio brand – balancing performance, durability and installation flexibility. The most outstanding features of Martin Audio SXC118

• Advanced Cardioid Technology – Superior Bass Directional Control: The SXC118 uses two contra-directional drivers (front & rear) to create a true cardioid dispersion pattern, reducing rear sound energy by up to 28dB at 75Hz. This results in bass that is focused towards the audience, not backstage – ideal for stages, theatres, bars, clubs and touring.
• Compact size – Superior performance: With a single sub design (single 18-inch + 14-inch) but achieving performance equivalent to traditional dual sub lines, SXC118 delivers maximum sound pressure (high SPL) while still being easy to transport, install and save space. This is the perfect choice for line array or ground stack systems that require flexible configuration.
• Phase alignment: Thanks to its dual-chamber structure and phase-optimized DSP signal processor, the Martin Audio SXC118 delivers accurate, consistent bass at all listening positions. This helps the system maintain linearity and a stable frequency range, limiting “bass echo” or “phase shift” when combining multiple subs.
• High quality materials, tour standard durability: The speaker cabinet is made of birch plywood coated with scratch-resistant polyurethane paint, with bay inserts and convenient handles - ensuring high mechanical durability, meeting strict road touring standards.
• Flexible system connectivity and integration: The SXC118 is optimized to work with WPC, WPS, or TORUS Series loudspeakers, and can be flown or floor-mounted with ease. Its high compatibility makes it easy for sound engineers to configure, align, and synchronize the system with Martin Audio DSPs or other processors.
• Strong, solid, and pure bass: 18” front coil 4” + 14” rear coil 3.5” configuration for deep, powerful bass and fast response speed, without “rumbling” or “mid-range”. Suitable for live music, EDM, pop, vocal performance or large-scale outdoor events.

Detailed review of Martin Audio SXC118 Karaoke Sub

Sound Quality – Deep, powerful and clean bass

The Martin Audio SXC118 delivers deep, linear bass that maintains clarity throughout the mix. Using a dual-driver configuration of 18 inches and 14 inches, combined with Cardioid Rejection Pattern technology, the product is capable of reducing up to 28dB of rear sound energy at 75Hz, completely eliminating the phenomenon of buzzing, echoing or resonance in closed spaces.

The SXC118's bass range has a fast attack, great dynamics and good control at high SPL levels, suitable for many music genres such as EDM, ballads, acoustic or vocal karaoke. When listening to it in real life, the bass has depth, force and bounce, but does not "overwhelm" the mid-range - something that very few karaoke subwoofers can achieve.

Design and durability – Sophisticated, durable European touring standards

In terms of design, the Martin Audio SXC118 Sub clearly shows the high-end European touring style with a cabinet made from multi-layer birch plywood, coated with scratch-resistant and impact-resistant polyurethane paint.

The speaker cabinet is reinforced to limit unwanted vibration and resonance, ensuring stable sound even at high power levels. Handles, flying inserts and protective steel grilles are optimally positioned for easy installation, transportation and system assembly.

The compact yet sturdy design makes the Martin Audio SXC118 suitable for both fixed installation in karaoke rooms and mobile for professional stages, ensuring durability according to Martin Audio's road-touring standards.

Performance and operability – Powerful, stable and precise

In terms of performance, the SXC118 reaches a maximum sound pressure level (SPL) of up to 138dB, providing powerful performance while maintaining cleanliness and stability. The product's two speakers use 4-inch and 3.5-inch voice coils, optimized for good heat dissipation, helping the speaker operate durably for a long time without sound distortion.

The phase alignment system ensures seamlessness between frequency bands, creating a neat, precise sound image. Even at high power, the Martin Audio SXC118 maintains low total distortion (THD), meeting the professional audio standards that Martin Audio sets for its touring product line.

System integration and expansion capabilities

A big plus of the Martin Audio SXC118 Speaker is its ability to be flexibly combined in many different sound configurations. The product can be perfectly paired with Martin Audio full-range speakers such as WPS, TORUS or CDD-LIVE, creating a complete system for karaoke, halls or events.

The Martin Audio SXC118 works best when paired with the iKON Series or VIA Series amplifiers, which use the DX4.0 DSP signal processor for precise phase and frequency alignment. The sub is also equipped with flying points, allowing for flexible hanging, splicing or floor placement, suitable for both fixed and touring spaces.

Real-life experience and overall review

In practice, the Martin Audio SXC118 delivers a thick, powerful but extremely clean bass, creating a feeling of "hugging" the entire space without causing unpleasant buzzing or resonance. In high-end karaoke systems, the sub helps the vocals become thicker and warmer, while clearly separating the vocals and background music.

With a stage or lounge setup, the SXC118's bass feels deep, powerful, and precise, giving the entire track depth and power. Overall, this is one of the most efficient compact cardioid subwoofers available today, perfectly combining power, durability, and acoustic refinement, making it a top choice for karaoke systems and professional performance sound.

Applications of Martin Audio SXC118 Subwoofer

The Martin Audio SXC118 is a cardioid subwoofer designed for professional sound environments requiring precise bass control.

Thanks to its bass directivity, 28dB rear reflection reduction at 75Hz and compact, easy-to-place design, the SXC118 is not only suitable for large performance stages but also perfect for high-end karaoke rooms where a “strong but clean” bass range is required. Popular applications of the Martin Audio SXC118

• High-end karaoke system, VIP room, recording studio.
• Bar – Club – Lounge
• Performance stage, outdoor events.
• Auditorium, conference center, theater.
• Church, religious center.
• Touring System.

Where to buy genuine Martin Audio SXC118 subwoofer at good price?

Phuc Truong Audio is the official distributor and strategic partner of Martin Audio in Vietnam, specializing in providing professional audio solutions for karaoke, stages, halls and touring events.

With over 10 years of experience in the industry, Phuc Truong Audio not only sells equipment but also designs, installs and calibrates acoustics to international standards, helping customers exploit the full power of the Martin Audio SXC118 Sub series.

Why should you buy Martin Audio SXC118 at Phuc Truong Audio?

• 100% genuine product – imported directly from Martin Audio UK: All products have clear CO, CQ, anti-counterfeit stamps and electronic warranty QR codes. Ensuring customers own genuine, original quality equipment.
• Competitive price, lifetime technical support: Phuc Truong Audio commits to the best price on the market for Martin Audio cardioid subwoofer lines, and provides free consulting - setup - maintenance services for the lifetime of the product.
• Professional service, EEAT standard: The team of sound engineers at Phuc Truong Audio has training certification from Martin Audio UK, directly supporting customers in designing sub placement, measuring frequency response, and phase alignment using specialized software such as Smaart or REW.
• Prestigious warranty and after-sales policy: All Martin Audio SXC118 products are warranted for 24 months, periodically maintained and have 24/7 technical support via hotline or directly at the showroom.

Frequently asked questions about Martin Audio SXC118 Karaoke Sub

1. Which amplifier or DSP should the SXC118 Subwoofer be paired with for optimal performance?

Martin Audio recommends pairing the SXC118 with Martin Audio power amplifier iKON or VIA and DSP DX4.0 processor. This configuration enables precise phase, delay and EQ alignment, optimizing the cardioid pattern. In addition, it can be combined with karaoke digital echo high end for best tonal balance.

2. How is the SXC118 sub different from regular subs?

The main difference is the Cardioid Pattern technology, which helps control the bass range more precisely than traditional subs. When the karaoke subwoofer Typically omnidirectional, the SXC118 limits unwanted reverberations and resonances, producing clean, crisp sound.

3. Can the Martin Audio SXC118 Sub be hung or floor standing?

Both. The SXC118 is equipped with bay inserts and a touring handle, making it easy to fly with a Martin Audio WPC/WPS line array or floor stack. System dependent stage speakers Martin audio
Phuc Truong Audio will design and install optimally.

4. Is the SXC118 Sub compatible with other brands of speakers?

Absolutely. Although optimized for the Martin Audio ecosystem, the SXC118 still works well when paired with other full speaker professional audio from other brands, as long as it has accurate phase and delay DSP. This gives the sound engineer flexibility in multi-brand projects.