Using the Crest Audio 7001 power amplifier is easy. First, connect the correct power supply to make sure it has a stable power source. Then, connect your audio devices to the appropriate input channels. You can use it in stereo or bridged mode depending on your needs. When using, keep it in a well - ventilated place to prevent overheating. Avoid placing it in a dusty or humid environment. For maintenance, regularly check the power supply and connections. If there is any dust on the amplifier, use a soft cloth to gently wipe it. Don't use any abrasive cleaners. If you encounter any problems, consult the manufacturer's customer service.