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原版LXMINI中高音后面用管状固定物并填吸音棉的考虑是为了获得中高频心形辐射。中高音管子的尺寸是通过计算的结果,吸音棉主要是衰减高频。老林对lxmini的设想是针对521对空间和摆位的苛刻要求以及pluto的不足。
摘自老林网站:
The rear radiation from the dipole must be attenuated or scattered and diffused in order to minimize the influence of a large reflecting surface behind the dipole radiator. The cylindrical body behind the dipole driver serves that purpose as its dimensions are in the fractional wavelength range of the frequencies concerned. There is a small gap between the magnet and the inside of the pipe. The rear is open and stuffed with absorbent material for very high frequency attenuation. The resulting polar response in the horizontal plane is shown below. The response in the vertical plane should be similar, because of closeness of the acoustically small sources. Thus a listener's ears should be on the dipole axis. Standing upright close to the speakers definitely darkens the timbre. |
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