Channel Vision’s It allows AB-904 4-Source, 4-Room A-BUS Kit is an excellent whole-house music solution. It allows up to four different sources to be played in four different zones simultaneously, making it perfect for families with a variety of listening interests. Controlling your music is easy with the P-1044′s source specific IR repeating which allows independent control of identical source components. The A0502 remote allows you to easily adjust the volume level on the AB-124 without leaving the comfort of your favorite chair.