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。
If the bass horn is long and have large mouth diameter, don't we have serious time delay?
如果低音号角是长的并且有大嘴直径，低音是有严重时延？
By Leos Janacek. For Flute, Oboe, Clarinet, Bass Clarinet, Bassoon, Horn. Published by Edition Peters.
由狮子座雅纳·切克。为长笛，双簧管，单簧管，低音单簧管，巴松管，圆号。彼得斯版出版。
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