The Martin Audio SX212 is a compact passive dual 12” subwoofer designed for professional audio systems requiring strong low frequency output from a relatively low-profile cabinet. Available in black or white, it is suitable for commercial venues, hospitality spaces, performance areas, houses of worship, museums, AV environments and installed sound systems where bass impact, clean presentation and reliable performance are all important.

Using two 12” long-excursion drivers with 3” voice coils, the SX212 provides a substantial increase in output and low frequency authority compared with smaller single-driver subwoofers. Its direct-radiating design and optimised reflex ports help deliver clean, controlled bass with reduced port noise, making it effective for foreground music systems, compact live sound setups and higher-quality installed audio applications.

With 800W AES power handling and 3200W peak capability, the SX212 is built for systems that require greater headroom and stronger bass reinforcement. The 4Ω passive design requires suitable amplification and active crossover processing, with crossover and EQ typically managed through a compatible Martin Audio controller or amplifier preset. Correct system setup is important to achieve balanced integration with the main full-range loudspeakers.

The SX212 has a frequency response of 48Hz–150Hz ±3dB, with useful low frequency extension down to 35Hz at -10dB. This allows it to add depth, warmth and impact to a wide range of loudspeaker systems, particularly where music playback quality and audience experience are key considerations. Its omnidirectional low frequency coverage also gives system designers flexibility when positioning the subwoofer within the room or venue.

The enclosure is constructed from plywood and internally braced to reduce unwanted cabinet resonance. A perforated steel grille protects the drivers, while 12x M10 inserts provide options for suspension using suitable hardware and professional installation methods. Measuring 872mm x 390mm x 437mm and weighing 39kg, the SX212 remains compact for its output level while offering the performance required for more demanding commercial and installed sound applications.

The Martin Audio SX212 is a strong choice for projects requiring compact but powerful low frequency reinforcement. Its dual 12” driver design, black or white finish options and professional installation features make it suitable for premium AV systems where bass performance, visual integration and long-term reliability are all key priorities.