As a business_level professional amplifier, its service life is three times more than the average.

营业版级专业扩大机，质量佳，寿命比一般多三倍。

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KTV professional amplifier, power amplifier civilian high, medium and low-end package of software and hardware development.

KTV专业功放、调音台、民用功放高、中、低档整套软件和硬件开发。

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Rojazz audio brand of products, including Kara OK speaker, professional speaker, professional amplifier, and professional and other peripheral equipment.

乐爵士音响品牌的产品系列包括卡拉ok音箱、专业音箱、专业功放和专业周边等器材。

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And for people who use their voices a lot, like singers or professional speakers, get voice training and use an amplifier.

VOA: special.2009.09.02