inputs.text: great product - far good done exactly asked using swap betwen auxilary input port overhead dvd player swaps audio great not noticed diffrence sound qaulity not savy automotive wiring would advise shop install product diverse product one way hook always like options installing componets no not need amplifier trigger leads swap sources used switch 12vdc source command sources ps not use acc wire backfeed circute not allowing radio shut key rehemoved directions warn not dont say