L-ACOUSTICS LA 24 MANUAL Version 2.2
17/11/08 9
The input impedance is high enough (20 kohms balanced) to allow ”daisy-chaining” or multiple
parallel input connections. To daisy chain, use the TRS jacks provided on each channel. The
input circuits have high enough headroom to accept the maximum output level from virtually
any low level signal source.
Figure 5. Rear panel connectors
Do not use XLR and TRS jacks on the same channel simultaneously for mixing or for
other purposes.
Figure 6. Balanced line
To connect an unbalanced source, tie pin 3 (ring on TRS jack) to the shield of the connector.
If you leave one pin disconnected, you will lose 6 dB in gain.
Figure 7. Unbalanced line connection
A more optimal method for handling unbalanced sources is shown in Figure 8. This is similar
to the connection for balanced lines, except pin 3 is tied to the shield at the source side
instead. The hum and noise rejection for the cable is equivalent to that for a balanced line. To
minimize hum, always use balanced inputs whenever possible.
Figure 8. Balanced line with unbalanced equipment
