◎ Small and medium-sized meeting rooms, multi-function halls, churches, and various occasions to enhance the sound.

◎ NS-128B is a high-voltage output ultralow speaker with two high-performance 18-inch basses built inUnit, two units interact to obtain the maximum output sound pressure.

◎ Straight-shot box structure design is adopted to reduce the harmonic distortion and airflow in the low frequency band and ensure the real low frequency performance in the high power.