17
Power Off Sequence
1. Turn down the output levels on the mixer (or other audio source) to its minimum position.
2. Disconnect power to the LS118 subwoofer first, twisting the locking POWER-IN connector counter-clockwise. If the LS118
subwoofers are daisy-chained to other boxes, power only needs to be disconnected from the first box in the chain.
3. Verify that power connections have been disconnected on each box. When the blue POWER indicator LED and yellow Standby
LED are no longer illuminated, it is safe to proceed.
4. Power off all audio source devices.
Audio Connections
NOTE:
While digital audio and analog audio can be physically connected simultaneously, the subwoofer will default to
digital audio if a Dante
®
audio connection is made, rendering the analog audio inputs muted until the Dante
®
signal is
disconnected. The analog connections can be used alongside a line array that is ethernet connected for QSC SysNav
™
control, as standalone without SysNav control, or as a backup audio connection in the event of digital audio failure.
Analog Audio
Each subwoofer features a LINE IN (input) XLR and a LINE OUT (output) XLR to support daisy-
chaining multiple loudspeakers/subwoofers in an array.
The LINE OUT XLR connector is wired in parallel to the LINE IN XLR connector, making it a direct
passthrough. It does not output any Post-DSP signal, nor is the level on the LINE OUT affected by
the digital GAIN setting adjusted on the subwoofer.
Using the XLR connectors, subwoofers can be safely daisy-chained up to any combination of
eight (8) subwoofers or top boxes without any signal loss.
NOTE:
It is not recommended to use unbalanced audio
connections with LS118 subwoofers. Always use XLR balanced
audio connections and wiring as shown in Figure 13.
Daisy Chaining using Balanced XLR Jumper Cables
1. Connect the audio source (such as a mixing console) to the LINE IN
XLR connector (6) on the rear panel.
2. If daisy-chaining additional boxes in the array, connect the audio loop-through jumper cable (not supplied) from the LINE OUT
XLR connector to the LINE IN XLR connector on the next loudspeaker/subwoofer.
3. Continue this process until all loudspeakers/subwoofers in the array are connected using balanced XLR cables.
Network
The dual network connectors also support daisy-chaining multiple loudspeakers/subwoofers in an array. Unlike the powerCON and
XLR connectors which have dedicated input and throughput connectors, the network ports are identical switched ethernet ports, which
means either can be used as an input or as a network hop to the next box in the array.
The network ports can accept a rugged etherCON connector or a standard RJ45 connector; however, etherCON type connectors are
recommended, rather than conventional RJ45 connectors, as the mechanical robustness and EMC performance is superior.
Each subwoofer includes two IP addresses, one dedicated for Control and one dedicated for Dante audio-over-IP; however, both
Control and Dante data traffic are carried over a single CAT5/6 cable into a single RJ45 port.
LINE IN
LINE OUT
— Figure 12 —
— Figure 13 —