The high efficiency subwoofer, OPL318B, could be flyable with OP4925L or stackable on the floor. OPL318B applies LAX's 3PCS high power direct radiated 18” components with long-throw 4” (100mm) high temperature resisting voice coil, two of them in the front and the other one at the back, divided by a baffle board, for which they are driven individually.

Cardioid dispersion could be realized through DSP4000's crossover and delay settings that will efficiently reduce the low frequency energy at the back and reduce the reverberation and increase the system gain. OP series line arrays are the most typical system with compact design and high SPL drivers which are suitable for live concerts with wide frequency requirements. It can be also applied in nightclubs and theatres if configured with relative processors.