The Class-D Professional PA Amplifier series is designed for hotels, supermarkets, and schools, featuring multi-zone audio control. It is suitable for use in wired audio systems, the announcement system supports both line and ohm formats, both indoor and outdoor formats.It supplies excellent sound quality with easy operation to achieve outstanding performance.The series has 5 inputs and 4 outputs. Use indoor or outdoor buttons separately according to different usage environments to get better sound-quality effects. It has a built-in USB MP3 player and Bluetooth 5.0 connectivity. There is an Echo function on both inputs 1 and 2 and treble and bass tones can be adjusted for each of the 4 microphones separately.Features 4 Zone Class D PA Amplifier 4 Line/Mic and MP3 player 5 inputs and 4 zone outputs Rated output power: 150W x 4 Independent channel with 4-zone switch Individual volume control for input 1 to input 4 Bass and treble control for input 1 to input 4 Echo function selection for input 1 and input 2 USB MP3 and Bluetooth 4 zone selection Output options: 4 ohm/70V/100V Monitor 1W 8ohm out and line out. Master volume control for 4 zones Indoor/Outdoor switch for 4 zones What is in the box? MPA4150 x 1pc Power lead x 1pc Manual x 1pc Rackmount ear x 1 pair Specifications MPA4150 MPA4250 AC Power supply 110-120V~,220-240V~ 50Hz/60Hz Maximum power consumption sine wave 1kHz,THD ≤ 1%,LOAD 4 ohm 920W 1449W Rated power consumption sine wave 1kHz,THD ≤ 1%,LOAD 4 ohm 700W 1000W Rated output power sine wave 1kHz,THD ≤ 1%,LOAD 4 ohm 150W*4 250W*4 Sensitivity/Impedances MIC 1~4(balanced) -40dBV (±2dB) -40dBV (±2dB) LINE 1~4(balanced) -5dBV (±2dB) -5dBV (±2dB) AUX(unbalanced) -5dBV (±2dB) -5dBV (±2dB) TEL -15dBV (±2dB) -15dBV (±2dB) Max Input Level MIC 1~4(balanced) -20dBV -20dBV LINE 1~4(balanced) +15dBV +15dBV S/N ratio MIC >65dB >65dB LINE >75dB >75dB AUX >75dB >75dB Bandwidth MIC+OUTDOOR 178Hz-7.96KHz 178Hz-7.96KHz MIC+INDOOR 132Hz-7.96KHz 132Hz-7.96KHz LINE+OUTDOOR 138Hz-12.6KHz 138Hz-12.6KHz LINE+INDOOR 70Hz-12.6KHz 70Hz-12.6KHz AUX+OUTDOOR 144Hz-17KHz 144Hz-17KHz AUX+INDOOR 76Hz-17KHz 76Hz- 17KHz THD+N 1/10 Rated Out/ 1W I /10 Rated Out/ 1W ≤ 1W ≤ 1W Tone control BASS @ 100 Hz ±10dB ±10dB TREBLE @ 10kHz ±10dB ±10dB Phantom supply condenser microphone 18V 18V Priority Sensitivity MIC+TEL -60dBv/3S -60dBv/3S Crosstalk 500-20KHz 60dB Noise all VR MAX
