bennychan：
還有一些電器要求:1》PRISOURCEIMPEDANCE:600OHMCT2》SECLOADIMPEDANCE: 600OHMCT3》PRIDCCURRENT:3mAMAX4》OPEROTINGLEVEL:50mWMAX 300HZ5》FREQUENCYRESPONSE(RELATIVETO1KHZ):+/-2.0dB300HZ--1KHZ6》LONGITUDINALBALANCE:60dBMIN 1KHZ7DCRESISTANCE:(1--3)70OHM+/-20%(4-6)95OHM+/-20%