QSC Audio HPR151W - Manual (Page 6)

6
AC Mains
Connect AC power to the IEC socket on the back of the amplifier by locating the IEC connector-end of
the AC power cord and inserting it fully into the IEC inlet on the power amplifier module. NOTE: Turn off
the AC power switch before connecting AC power.
The correct AC line voltage is shown on the serial number label, on the rear panel. Connecting
to the wrong line voltage may damage the amplifier or increase the risk of electric shock.
AC Mains Disconnection
Turn the AC power switch to the off position. To remove the AC mains cord, grasp the IEC connector’s
plastic body and pull, removing the connector form the socket.
Power Switch
Push in on the top of the rocker switch to apply AC mains power to the powered loudspeaker. Push in
on the bottom of the rocker switch to turn the powered loudspeaker off.
When turned on, the blue Power indicator LED and the red LIMIT (limiter) indicator LED will illuminate;
after a few seconds the red LIMIT indicator will extinguish.
LED Power Indicator
The blue LED Power indicator will illuminate when the AC Power switch is in the “ON” position, the AC
mains power cord is connected properly, and the AC mains are functioning properly. The LED Power
indicator will extinguish when the AC Power switch is in the “off” position or AC mains power has been
removed from the loudspeaker.
If the Power indicator does not illuminate when the Power switch is placed in the “on” position, verify
the AC mains line cord is properly attached to the loudspeaker and plugged into the AC outlet. Verify
the outlet is functioning properly.
If the AC mains cordset is serviceable and the AC mains outlet is operating properly, but the
loudspeaker fails to operate, the loudspeaker may require servicing. Contact QSC’s Technical
Services department.
System Power Sequencing
Proper power turn on sequence can help to prevent unexpected sounds from your system (pops, clicks,
thumps). These unintended sounds can damage drivers and cause audience members to question the
professionalism of the sound team. Turn on and off the system in the proper order to avoid unexpected
sounds.
Power On Sequence: Turn on all source devices (CD players, mixers), turn on subwoofer, then turn on
the “top-boxes” (HPR152F and HPR153F).
Power Off Sequence: Turn off the top-boxes, turn off the subwoofer, then turn off the source devices.
Input Connections
Full-range models have one female XLR line-level input marked FULL RANGE LINE IN.
Subwoofers have a second set of connectors, one for the left channel’s audio and one for the right
channel’s audio.
We recommend balanced connections be used. Balanced connections will reduce AC hum and interfer-
ence, especially with long cable runs. Unbalanced connections may be suitable for short cables. The
input impedance is 22k ohm for balanced connections or 11k ohm for unbalanced connections. The sig-
nal's source impedance should be less than 600 ohms.
AC power switch
Power “on” indicator LED