Using the EAW SM122e is easy. First, connect it to your audio source properly. Make sure all the cables are well - plugged in. When you're on stage, place it at a suitable angle so you can clearly hear the sound. As for precautions, avoid exposing it to extreme temperatures and humidity as this may damage the internal components. For maintenance, regularly wipe the speaker with a soft, dry cloth to keep it clean. Don't forget to check the cables for any signs of wear and tear every now and then. With these tips, your EAW SM122e will serve you well for a long time.