Using the Crest Audio 7001 2 - Channel Power Amplifier is easy. First, make sure it's connected to the correct power supply included with the product. Then, connect your audio sources to the appropriate channels. You can use it in stereo or bridged mode according to your needs. When using, keep it in a well - ventilated place to prevent overheating. Don't expose it to water or excessive dust. For maintenance, regularly check the connections to ensure they are secure. Wipe the surface with a dry cloth to keep it clean. If you encounter any problems, contact the manufacturer's customer service.