【Circinus】象征物是绘图圆规，原因是声音取向平均，面面俱圆，不会偏向任何一方。
Circinus means “Compasses". The sound orientation is balanced, well-rounded. Just like a circle, it won't biased to a specific side.
Specification
3 Balanced Armature Drivers
2 ways passive crossover
Frequency：20Hz-19KHz Sensitivity：112dB SPL/mW
DCR：19.6 ohm
Noise：26dB
