该密封音箱采用21 V2超低音单元，内附安装配件，紧密结构重现强劲低音。
Sealed box equipped with 21 V2 subwoofer. Installation kit included. Dependable bass reproduction in a compact environment.
宁波尊隆电子有限公司成立于1995年，产品包括汽车扬声器、家庭音响高低音单元、舞台音箱、扬声器配件及密封式音箱等。
NingBo ETTON Electronics Ltd. Company set up in 1995. Product include car speaker, Household woofer unit, pa speaker Cabinet, Raw materials of speaker and Boom box, etc.
牌吉他拾音器、校音器、音箱、效果器、提琴、古筝拾音器等乐器配件，及周边电声产品的研发、生产。
Guitar Equalizers, Tuners, Amplifiers, Effectors, Violin Equalizers and Chinese Zither Equalizers and other related electronic products.
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