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By certification 
BL-13 Two-way FullRange LoudSpeaker Systems
BL-13 of 5.S brand is a two-way multifunction full range loudspeaker system, The design of BL-13 is balance back oriented, equipped with Round aluminum horn that can be adjusted with a range of 90°*60°. It is embedded in a 13" ultra-low distortion unit and 1.5" horn compression driver unit.
BL-13 of 5.S brand is a two-way multifunction full range loudspeaker system, The design of BL-13 is balance back oriented, equipped with Round aluminum horn that can be adjusted with a range of 90°*60°. It is embedded in a 13" ultra-low distortion unit and 1.5" horn compression driver unit.
