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.

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。

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Tri-Amping - A technique commonly used in large-scale sound amplification for concerts, Tri-amping is the practice of connecting three audio amplifiers to a loudspeaker unit: one to power the bass driver (woofer), one to power the mid-range and the third to power the treble driver (tweeter).

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The stereo unit is built around a two-way system featuring a soft dome tweeter and a powerful compact woofer loaded by a passive radiator, for each channel.

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