Pushing this button is all that is required to turn on the S5165/S7165/S820 if it is not part of a JBL Synthesis Series
system. If the amplifier is used as part of a JBL Synthesis Series system, the Power Trigger In/Out Jacks
be used to automatically turn the amplifier on and off, and the power switch should be left in the On position by
pushing the button in. See the explanation for the Power Trigger In/Out Jacks
on the S5165/S7165/S820.
This indicator, immediately above the front-panel power switch, will glow red when the amplifier is in the "standby"
mode, whether operating as part of a Synthesis system or not. When the S7165/S5165/S820 is in the "on" mode,
this light will shut off and the blue "on" mode indicators will light.
These indicators will light up when the power amplifier is in the "on" mode. Each monitors the operation of one
channel, and will be extinguished if that channel's protection circuitry is activated.
The output signals from the Synthesis digital processor and equalizer are connected to the input jacks in a Synthesis
system. See the connection diagrams on pages 14–18 for detailed connection instructions. If using the XLR inputs,
be sure to wire the XLR using the EIA standard of Pin 1 as ground, Pin 2 as positive and Pin 3 as negative.
Connect the speakers to these terminals, following the normal convention: Wire the "+" side of the speaker to
the red terminal, and the "–" side to the black terminal. Wire the speakers with the proper polarity; reversing any
speaker's connections will not damage either the speaker or the amplifier, but will result in poor low-frequency
performance and imprecise imaging.
If using the S820 in bridged mono mode, connect the speaker to the center red terminals only; no connection is
made to the black terminals. Wire the "+" terminal of the speaker to the left red terminal, and the "–" terminal
of the speaker to the right red terminal.
In bridged mode, speakers connect only to the "hot" (red) amplifier output connectors, and neither can
be connected to ground under any circumstances, as damage to the S820 will result.
NOTE: The S5165 is shown; S7165 and S820 are similar in appearance.
for more information on turning