What's the link or relationship of trigger signals between sound unit (XVUC9V) and light units (XVUC2x)?
Due to the sound channels and the LED lights share signal wires, they have the fixed combination.
Note: the sound unit only can be installed at first layer.
| Voice Channel No. | LED light Layer |
| CH1 | Layer 2 (e.g. Red) |
| CH2 | Layer 3 (e.g. Orange) |
| CH3 | Layer 4 (e.g. Blue) |
| CH4 | Layer 5 (e.g. Green) |
Note: the sound unit only can be installed at first layer.