国产人成无码中文字幕_亚洲日本美女色图_国产精品自拍啪啪啪_亚洲免费视频三区_日韩精品 妓女在线观看视频免费_蜜臀av无码人妻精品_亚洲AV无码破坏版在线观看_中文字幕第一页手机在线_黄色草莓视频app_免费看欧美一级片

W series speaker was developed by our company a for outdoor amplification, small and medium-sized performance ShangYan tool. Use the world advanced BASSBOX - OVER aided design software and CLIO acoustic test design. Its characteristic is: the constant directivity, symmetric horn sound diffusion and bass units, high sensitivity. 75 core, 180, the import of titanium soprano, strong penetrating power, clear and exquisite, aluminum bass unit, carrying big power, low elasticity, bring you different feeling, the unique triangular Kong Tie net, net lined with 3 mm cotton filter out noise to make sound more clean.