The Logitech Z5500 system consists of several components:

This 15-pin connector carries all audio signals and power logic. The wiring is divided into shielded audio lines and non-shielded logic/power lines. Pin # Wire Color Signal Function Right Rear Audio 2 Subwoofer Audio 3 Black/Yellow Left Rear Audio 4 Blue/Black Center Audio 5 Left Front Audio 6 Rear Channel Enable 7 Center Channel Enable 8 Front Channel Enable 9 Right Front Audio 10 +8V Logic Power 11 System On/Off 12 White/Black Mute Control 13 Light Green Logic Ground 14 Positive Supply (+) 15 Negative Supply (-) 2. Bypass Cable (Hooking Sub to AV Receiver)

Original kits typically included two 25' (7.6m) cables for rears and three 15' (4.6m) cables for front/center.

The back of the subwoofer acts as the central hub for all speakers and external audio sources.