Mode switches for mono 3-way or stereo 2-way operation TRS balance input and output Stereo subwoofer output or left/right channel low frequency + overclocking output 40Hz high pass (low cut) filter both channels x10 range switch on both channels Using Stepping Selection potentiometer, so that more accurate adjustment Professional calibration 24dB/Oct, Lin,Kwitz-Riley filter Technical Specification • Bandwidth: 20Hz-20kHz,+0/-0.5dB • Frequency Response:<3Hz-90kHz,+0/-3dB • S/N Ratio: reference value +4dBu,22kHz measure bandwidth • Stereo mode, mono mode: • Low frequency output: >94dB >94dB • Mid frequency output: >93dB • High frequency output: >92dB >92dB • Dynamic range: >114dB • THD + Noise: <0.004%+4dBu,1kHz <0.04%+20dBu,1kHz • Crosstalk between each channels: <-80dB,20Hz-20kHz • Packing: Color Box 5pcs/ctn L*W*H: 57*33.5*31