The sound quality in a car audio system can be affected by wire gauge through its impact on power delivery to the amplifier and speakers. This means using correct wires gauges helps in facilitating efficient transfer of adequate amounts of power required by different components involved here hence preventing voltage drops which are known for causing poor sounds but rather maintaining continuous flow high quality sound output everywhere within one's vehicle setup otherwise undersized wires might lead to underperformance or even damage of speakers and other parts.