P631三路麦克风前置放大器P631由三路ICP供电麦克风前置放大器与一路后级放大器组成，可直接接驳各类音频分析测量系统，完成手机、耳机、微型喇叭的声学参数测试。MICROPHONEPREAMPLIFIERTECHNICALSPECIFICATI***：FREQUENCYRESP***E:7Hz÷110kHz(-3dB)THD(@1kHz):0.01%WEIGHTINGFILTERS:A(IEC651-TYPEI)INPUTNOISE(@20dBGain):7uVLIN,5.3uVAPHANTOMPOWERSUPPLY:8.2V，24V(5600Ohm)DRIVECAPABILITY:&plu***n;7mAGAIN:0&20dBINPUTIMPEDANCE:5600OhmOUTPUTIMPEDANCE:100OhmSIZE:210×143×69mmMAXIMUMOUTPUTVOLTAGE(@1kHz):5VppAM/FM信号源POWERAMPLIFIERTECHNICALSPECIFICATI***：OUTPOWER:50W(8Ohm)FREQUENCYRESP***E:20Hz÷110kHz(-1dB)THD(@1kHz):0.004%)