Using the QSC CX702 power amplifier is easy. First, make sure it's connected to the correct power supply included with the product. Then, connect your audio source to the amplifier. You can adjust the volume and other settings as needed. When using it, avoid placing it in a hot or humid environment. Keep it in a well - ventilated area to prevent overheating. For maintenance, regularly clean the exterior with a soft, dry cloth. If you notice any issues, turn it off and check the connections. That's all you need to know to keep your amplifier running smoothly.