QS15 ultra-low frequency system is equipped with a 15-inch bass, high energy drive, a well-designed to accommodate the logarithmic horn loaded box in the.
QS15超低频系统配备一个15英寸低音,高能量驱动器容纳在一个良好设计的对数式号筒装载箱体中。
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After being encouraged by the spruce horn experience, I built a couple of monitor speakers, a guitar combo amplifier and a bass-guitar box with an ALTEC 416b driver.