... The speaker of P Seres Reflex sub-bass system ,One 18" special bass unit ,Resulting in deep and power rich, ... pentrating bass . Features: Reflex sub-bass system One 18" special bass unit Resulting in deep and power rich, ... amplifier 600W-1200W/8ΩPurpose: Concert with P, W series, use for Disco barperformance hall KTV roometc.Specification :Frequency ... 713(D)mmNet Weight 55Kg Loud Speaker P Series