Owner’s Manual for models HP112 • HP115 • HP215 • HP118S
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bass response by having the subwoofer set to reverse polarity, or
having several subwoofers set at different polarities. Bass response
also will change with the listener’s position in the room. During
testing, monitor the bass response from several different locations
in the venue.
How to Use the POLARITY Switch:
Start with all subwoofers in
the system with POLARITY switches in the NORM position. This is
the same for systems with one subwoofer as well. Next, with your
system playing at or near its expected operating level, change the
polarity of each subwoofer, one at a time. Walk around the venue
and evaluate the overall bass response, and select the phase
setting that produces the best overall bass response.
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GROUND LIFT SWITCH
All HP Series amplifier modules are equipped with a GROUND
LIFT switch. Powered loudspeakers are often fed by long run
signal cables, connected to power outlets different than the audio
source’s. This may create an audible hum or buzz due to ground
loops or other connection problems. The GROUND LIFT switch
will help you to avoid these issues.
It is a good idea to keep the GROUND LIFT switch in EARTH
position unless you have hum or buzz coming from your speakers.
If you do hear hum or buzz, toggle switch into LIFT position.
WARNING: NEVER BREAK EARTH CONNECTION IN YOUR
AC PLUG. IT MAY CAUSE PERMANENT DAMAGE TO THE
AMPLIFIER AND MAY CAUSE DANGER OF ELECTRICAL SHOCK
TO YOU AND OTHERS.
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POWER SWITCH
Push in the top of the power switch to apply AC power to the
powered loudspeaker’s amplifier. Push in the bottom of the power
switch to turn the loudspeaker amplifier off. When turned on, the
blue POWER indicator LED on the front grille will illuminate, along
with the POWER and PROTECT LED on the amplifier. After a few
seconds, the yellow PROTECT LED indicator will dim and turn off.
NOTE that System Power Sequencing prevents unexpected sounds
from your system (pops, clicks, thumps), make sure to power
ON your HP series loudspeakers in the proper order. Improper
sequencing while powering ON your equipment can damage the
loudspeakers. Power the loudspeaker system ON and OFF in the
proper order to avoid unexpected sounds and damage to your
loudspeakers.
•
Power On Sequence - Turn ON all source devices (CD players,
mixers), turn ON the HP118S subwoofer, then turn ON all HP
Full-range loudspeakers.
•
Power OFF Sequence: Turn OFF all HP Full-range loud speakers
and then HP118S subwoofers, then power down all source
devices.
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AC MAINS
Insert the IEC power cord fully into the IEC inlet on the power
amplifier module.
NOTE: Turn OFF the power switch on the HP loudspeaker before
connecting the AC power cord. The correct AC line voltage should
be selected on the rear panel. For operation in the United States,
leave the voltage selector on the amplifier set to 115V. Connecting
to the wrong line voltage will damage the amplifier and may
create the risk of electric shock.
AC Mains Disconnection - Turn the AC power switch to the off
position. To remove the AC power cord, grasp the IEC connector’s
plastic body and gently remove the IEC connector from the socket
by pulling it straight toward you.
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AC SELECT SWITCH
Make sure AC Select Switch is set to voltage appropriate for your
country.
NOTE: Connecting HP powered loudspeakers to AC voltage not
matching to AC Select Switch will damage the amplifier and may
create the risk of electric shock.
