... -257 1.2*15" LF 2.with vertical line and high power subwoofer system 3.waterproof paint The dual 15 ... :Description:XLC-257 is a high top birch plywood structure, with vertical line and high power subwoofer system.High power 2*15" subwoofer, ... is more clear and powerful permeation, quick transmit speed, strong permeation , solid sound , it is suitable for large performance, stadium,large reinforcement ...