这种坚固的钢柱安装，这是黑油漆成品，接受一个M 20螺纹扬声器极。
This rugged steel pole mount, which is finished in black paint, accepts a M20 threaded speaker pole.
该方案64是一种高性能，低阻抗方向柱扬声器特别好控制和一致的方向性对系统的200 - 20kHz的工作范围。
The Programme 64 is a high performance, low impedance directional column speaker with exceptionally well controlled and consistent directivity over the system's 200-20kHz operating range.
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