BASS refers to low-frequency sounds, while BAND represents a group of musicians and LOUD refers to amplified sound. It initially started with car-mounted AM radios, then progressed to include AM FM radios and cassette players. Later, CD players and digital audio players compatible with DCC and DAT were introduced. Car audio systems are designed to provide a means of receiving and delivering sound to alleviate boredom during travel. Nowadays, car audio systems have higher standards in terms of sound quality, ease of use, and vibration prevention. They are able to withstand the bumpy terrain of roads, ensuring stable performance and optimal sound quality.