People often complain about the sound quality of their audio systems, but they often don't pay attention to the quality of the audio files they're playing. For the best car audio experience, the source of the audio files is just as important as the components of the car audio system.
The problem with digital music files is that they are often over-compressed, resulting in a loss of clarity in the audio. Many of us have old music collections that we bought or sourced from someone years ago. If these collections are a decade or more old, they may be severely compressed. As a result, you will not get the desired sound quality.
The best thing to do in this regard is to switch to a lower level of compression or get audio files encoded in a lossless format - also known as high-resolution or high-definition audio. The type of format determines the quality of the audio file. While formats such as MP3 and AAC offer traditional quality, other formats such as ALAC, WAV and FLAC offer higher resolution and better sound quality. The only catch is that since they take up more storage space on the device, you might not be able to make the whole connection - which, to be fair, isn't necessary unless you're planning a long journey.
