Using the Behringer AMP800 is a breeze. First, connect your audio source to the balanced stereo main inputs. Adjust the Level and Balance controls according to your preference for each input. You can then connect your headphones to the front or rear panel outputs, up to 8 pairs in total. For easy level monitoring, use the Phones Level control and the 6 - segment LED output meter on each channel. If you need more headphone outputs, use the Parallel Link Output to connect additional amplifiers. When it comes to maintenance, keep the amplifier in a clean and dry place. Avoid exposing it to extreme temperatures or humidity. If the amplifier gets dirty, use a soft, dry cloth to gently wipe it. Also, make sure to turn off the amplifier when not in use to save energy and extend its lifespan. That's all there is to it, and you're ready to enjoy high - quality audio with your headphones.