Standard Distributed Audio Systems typically utilize a control wire
(often CAT5) as well as speaker wire (see Section 1.1.1 for wiring details).
The CAT5 wire sends signals from a keypad back to a centrally located controller,
which provides volume control and source selection for the different listening
zones in the system. The speaker wire delivers amplified audio from a centrally
located amplifier out to the speakers in different listening zones. In some cases,
the amplifier may be built into the controller, which saves space and simplifies
the required interconnections.
    

The A4603, A1260, six A0127s, and accessories are packaged together to form the
A-Kit 1 audio system. The A-Kit 2 is identical except for the addition of 6 pairs of
IC612 in-ceiling speakers. The diagram below provides details of the interconnections

The A4603, A1260, six A0127s, and accessories are packaged together to form the A-Kit 1 audio system. The A-Kit 2 is identical except for the addition of 6 pairs of IC612 in-ceiling speakers. The diagram below provides details of the interconnections.