Low-frequency reinforcement from Martin Audio and NEXO, from compact 10-inch boxes for speech and background systems up to double-18 touring subs like the Blackline Q218 and SX218, with the SXC115 adding a cardioid option where spill control matters. The range splits into Active and Passive child categories, with an Accessories section for covers, wheelboards and stacking hardware.

Format is the first call: a single 12 or 15 adds weight to speech and playback, single 18s handle most band and DJ work, and double 18s carry dance floors and outdoor stages. Powered SXP models keep amplification and processing in the box, while the passive SX and Blackline Q ranges assume amp channels and DSP in the rack, so decide where you want the weight and the spend before comparing boxes. Cardioid designs like the SXC115 cancel energy behind the cabinet, keeping low end off the stage and away from neighbouring rooms. Stay within one manufacturer’s family where you can, since published crossover and limiter presets for matched top-and-sub pairs are proven, and mixing families means doing that work yourself.

Ground stack brackets, transit covers and wheelboards live under Accessories, and matching tops are in the Point Source categories.