Sub Martin Audio SX212

Martin Audio SX212 is a dual subwoofer speaker line in the professional audio segment from the famous British brand Martin Audio. Possessing a compact design, high performance and powerful bass, SX212 is the ideal choice for performance spaces that require deep and powerful dynamics - from high-end karaoke rooms to live band stages or bar clubs.

Introducing the Martin Audio SX212 Subwoofer

Martin Audio SX212 is a 12-inch dual subwoofer model of the famous SX Series of the Martin Audio brand (UK). With a compact but powerful passive design, SX212 delivers deep bass, strong impact and excellent control, suitable for stages, bars, clubs, halls or high-end karaoke rooms. This is the ideal choice for those who want to upgrade their sound system to professional - classy - British standards.

Technical parameters of the product to consider:

• Speaker type: Passive: The speaker does not have an integrated amplifier inside, it needs to be combined with a separate power amplifier or power main. This design helps optimize performance, easily adjust gain - crossover - limiter via DSP, ensuring more realistic and powerful sound.
• RMS power: 800W | Peak: 3200W: With 800W RMS power, SX212 can operate continuously and stably without loss, while 3200W peak power allows for the reproduction of extremely strong bass, high dynamics, suitable for EDM music, dance or live shows.
• Bass speaker structure (LF): 2 x 12” (300mm): Two 12-inch bass drivers work in parallel, creating 6dB more sound pressure than a single subwoofer. This dual-woofer design delivers deep, powerful bass while maintaining phase accuracy, avoiding booming and echoing.
• Voice Coil LF: 3” (75mm): The 3-inch voice coil helps dissipate heat quickly, reduces total harmonic distortion (THD) and increases the load capacity when playing for a long time at high volume levels - this is the key factor that determines the durability and stability of the driver.
• Impedance: 4 Ohms: The 4Ω impedance level helps to maximize the amplifier's power, easy to combine with high-power 2-channel power amplifiers, such as Lab Gruppen, Powersoft, Eudac, Crown...
• Frequency response: 48Hz – 150Hz: This frequency range allows the Martin Audio SX212 to reproduce deep and tight bass, perfectly supporting full-range speakers from 60Hz and above. The high frequency opening of 150Hz makes it easy to pair with many different full-range speakers while maintaining a smooth crossover range.
• Sensitivity & Max SPL: 138 dB SPL: The maximum SPL of 138dB shows the ability to create strong sound pressure, meeting the needs of large stages, halls, and bars and clubs while still maintaining detailed, uncompressed sound quality.
• Connection ports: 2 x NL4 (Neutrik Speakon): NL4 port standard ensures stable signal transmission, anti-interference and supports parallel link out of multiple speakers, very convenient when setting up array or stack systems.
• Dimensions: 872 × 390 × 437 mm | Weight: 39 kg: Significantly more compact than 15” or 18” twin subs, making it easier to position, transport and install. Weighing in at 39kg, it offers an ideal performance/weight ratio in the twin sub segment.

Outstanding features of Martin Audio SX212 Subwoofer

The Martin Audio SX212 is a dual 12-inch passive subwoofer designed specifically for high-end stage, auditorium and karaoke sound systems. With a combination of advanced acoustic technology and precision mechanical finishing, the SX212 delivers powerful performance in a compact design, meeting the needs of professional performance and high-end entertainment.

• 12” dual design – deep bass, powerful impact: The structure of two 12-inch (300mm) bass speakers arranged in parallel in the speaker cabinet helps increase sound pressure, giving a deeper, more solid and even bass range than a single subwoofer. This design also helps reduce phase noise and optimize bass coverage in large spaces, suitable for stack or array setups in stage systems.
• Exclusive reflex tuning speaker cabinet technology: Martin Audio SX212 applies bass reflex technology with airflow venting port, ensuring the sound flow from the back of the speaker is in phase with the sound wave in front, thereby enhancing the depth and compression of the bass range, while limiting distortion when operating at high intensity.
• High Performance – Sensitivity up to 138dB SPL: With a maximum power (Peak) of 3200W and an SPL of 138dB, the SX212 provides powerful sound pressure, enough to meet the needs of outdoor stages, bars, clubs or large singing rooms. The frequency range of 48Hz - 150Hz is reproduced smoothly, without missing the low range, for deep - powerful - compact - no hum bass.
•  3” Voice Coil – Extremely durable and load-bearing capacity: The 75mm diameter voice coil allows the Martin Audio SX212 to operate durably under continuous high power conditions. Thanks to the ability to dissipate heat quickly, the speaker still maintains acoustic stability and limits distortion even when operating for a long time.
• Compact mechanical design – easy to setup and move: High-quality MDF speaker cabinet covered with scratch-resistant, moisture-proof Polyurea paint - durable in weather and performance environment. Dimensions 872 × 390 × 437 mm, weight only 39 kg, making SX212 easy to stack or move around, saving space but still ensuring performance equivalent to large 15” subs.
• High synchronization in Martin Audio system: The SX212 is perfectly compatible with the Martin Audio Blackline, CDD or TORUS full-range loudspeakers, creating a unified sound system from low - mid - high. When combined with a Martin amplifier or DSP Controller, the Martin Audio SX212 achieves optimal performance and absolute speaker protection.

Detailed review of Martin Audio SX212 Subwoofer

Sound Quality – Powerful bass, precise control

Martin Audio SX212 reproduces the 48Hz – 150Hz frequency range linearly, for deep, tight and precise bass. With the structure of 2 12” bass drivers and reflex tuning technology, the sound is better controlled, minimizing phase cancellation.

When operating at high power, the 138 dB SPL sensitivity allows the SX212 to fill a 100-150m² space with bass without distortion. Compared to the 18” sub series, the SX212 retains the advantage of fast response speed, making it suitable for dance music, live bands, EDM or acoustic vocals that require a clean and decisive punch.

Speaker cabinet design – Durable and acoustically optimized

The SX212 uses a thick MDF cabinet, coated with waterproof Polyurea paint, ensuring high mechanical strength, anti-vibration and unwanted resonance. The slot vent bass reflex design helps increase air circulation, reduce harmonic distortion and improve low-range performance.

The speaker edges are slightly rounded to limit sound reflection and make it easy to stack multiple speakers on top of each other. The dimensions of 872 × 390 × 437 mm and the weight of 39 kg are the ideal ratio between power - durability - mobility, allowing the SX212 to be easily moved, installed and combined into an array system.

Performance and load capacity

With 800W RMS power – 3200W Peak, SX212 is capable of operating at high levels continuously without loss of sound quality. The 3” (75mm) voice coil helps dissipate heat quickly, reducing the risk of coil burnout when operating for long periods of time.

In fact, the SX212 can work well with mains with 1000–1500W/CH at 4Ω, ensuring stable dynamic headroom. When combined with DSP Controller or Martin Audio iKON amplifier, the sub can precisely adjust delay, crossover and limiter, helping the system achieve optimal performance.

Flexible combination ability

SX212 is a 4Ω passive subwoofer, compatible with most high-power stage amplifiers on the market. The product has 2 NL4 Speakon ports that support parallel connection of multiple speakers, making it easy to expand the system.

When paired with the Martin Audio CDD12, Blackline X12 or TORUS T1215 full-range speakers, the sound range becomes full, balanced and smooth from low to high, creating a synchronized British standard sound experience.

Applications of Sub Martin Audio SX212

Martin Audio SX212 is a professional 12-inch passive dual subwoofer speaker line, developed based on the acoustic platform of Martin Audio (UK) - a famous brand with international-class stage sound systems.

With strong power, deep bass range and high stability, SX212 easily meets many different usage environments, from professional performances to high-end entertainment spaces. Below are the typical applications of Martin Audio SX212:

• Business karaoke room, VIP room
• Bar, club, lounge, pub.
• Performance stage – live show – event.
• Halls, event centers, churches.
• Movie room, studio, high-end home entertainment space.
• Combined with Martin Audio full-range speaker system.

Where to buy genuine Martin Audio SX212 Sub at good price?

Phuc Truong Audio is the official authorized dealer of Martin Audio in Vietnam, specializing in supplying - installing - warranty of genuine speakers for auditoriums, stages, karaoke, and bar clubs.

Here, customers can experience the SX212 Subwoofer in real life, compare it directly with the SX218, SX210 lines, or combine it with Blackline X12, CDD12 to choose the most suitable configuration.

Reasons to buy Martin Audio SX212 at Phuc Truong Audio:

• 100% genuine goods - fully imported with CO, CQ, anti-counterfeit stamps, VAT invoices.
• Most competitive price in the market, with discount policy - installment payment - support for agents and projects.
• Test directly at the showroom, experience the real bass of SX212 in many different sound configurations.
• On-site technical support: a team of professional technicians helps with connection, phase adjustment, delay, and crossover optimization for the space.
• Nationwide warranty and maintenance, providing compatible genuine accessories, power boards and DSP controllers.

Frequently asked questions about Sub Martin Audio SX212

Which speaker line of Martin Audio does the Sub Martin Audio SX212 belong to?

The Martin Audio SX212 is part of Martin Audio's professional subwoofer range, featuring a dual 12-inch design, high performance and impressive bass accuracy. It is part of the SX Series ecosystem – along with models such as SX210, SX115 and SX218, developed specifically for high-end stages, halls and karaoke.

Is the Martin Audio SX212 Sub active or passive?

Martin Audio SX212 is a passive subwoofer, not integrated power amplifier inside. To maximize performance, you should pair the SX212 with a professional power supply or Martin Audio iKON amplifier. This configuration provides better bass control, ensuring deep and clean bass when operating at high power.

Which space is the Martin Audio SX212 suitable for?

With a sensitivity of 138dB SPL and a peak power of 3200W, the SX212 can easily accommodate a variety of spaces: from VIP karaoke rooms, bar clubs, lounges, auditoriums, to outdoor performance stages. The 48Hz - 150Hz frequency range helps the bass spread evenly without echoing or buzzing. You can see more suggestions in the Phuc Truong Audio Sound Solutions section to choose the right configuration for each room area.

Which Martin Audio speakers should the Sub SX212 be paired with?

Martin Audio SX212 is a perfect match for full-range speakers Martin Audio Blackline X12, X15. When properly matched, the sound range will be balanced from low - mid - high, creating a system that is in-phase and has depth. In addition, the use of DSP processor helps to precisely align delay and crossover, bringing smoother and more vivid sound quality.