Using your Cort GB - MODERN - 4 - OPVN electric bass guitar is easy. First, make sure your instrument is in tune using the Hipshot® Ultralite Tuning Machines. Then, plug it into your amplifier using a suitable cable. Adjust the volume and tone controls on your bass and amplifier to get the sound you like. When you're done playing, put the bass back in its deluxe soft - side case to protect it from dust and scratches. As for maintenance, keep your bass clean by wiping it down with a soft, dry cloth after each use. Check the strings regularly and replace them when they start to sound dull or show signs of wear. You can also use a small amount of fret cleaner on the roasted maple fretboard to keep it in good condition. Avoid exposing your bass to extreme temperatures or humidity, as this can damage the wood and affect the instrument's performance.