This mono 1000 Watts Car Audio Amplifier gives you a wonderful in-car entertainment. and high quality Current /Amperage Overload, Short Circuits, Thermal Overload, DC Offset Model: PA-80D Max Power: 1000W Rated Power: 600W : Less than 0.01% Frequency Response: 30Hz~280KHz Operating Voltage: 12V Impedance: 4ohm : 105dBA Wiring: 1, Speaker connection: amplifier board has a good piece of red and black wire welding can be accessed by a 4-8 Euro 100-150W bass or full-range speaker or speakers (red pick horn + , black pick speaker - is recommended to use 4 ohm 8-12 inch 45 core 100-170 magnetic bass ) ; 2, Power connection A. car has a CD player: GND then negative vehicle power;12V power supply connected to the car 's positive ; REM CD player connected to the control line (so the CD player can directly control the subwoofer amplifier on and off ) B. car no CD player: GND connected to the negative power of the car , + 12V and REM connected together in positive 12V car power ( + 12V can also be an indirect one with REM switch control amplifier switching function ) ; C. directly with the battery (battery) connection: GND connect the battery negative , + 12V and 12V REM then the positive battery simultaneously . colour: black Material: Aluminum housing size: 23.5*15.5cm Package Contents: 1* Car Audio Amplifier Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.