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HK 990
Connections
Connecting Other Components
Make sure your amplifier and other components are turned off.1.
Connect each component’s output/play jacks to the corresponding input jacks on the 2.
back of your amplifier and, if available, the component’s input/record jacks to the
output jacks of the HK 990. Use the white, black or gray plugs to connect Left-channel
jacks; use the red plugs for Right-channel jacks.
Wired Remote Control
To control your amplifier with an external infrared remote sensor, connect the wire from the
remote sensor to the Remote In jack on the back panel. Or, if another stereo component has
a built-in infrared remote sensor and a Remote Out jack, it may be possible to connect this
jack to the Remote In jack of your amplifier. All Harman Kardon products with Remote In
and Remote Out jacks are com pa tible with one another, except for the Citation 22, 24
and 25.
Other manu fac turers’ remote sensors and components may not be compatible, but it will
not hurt to experiment. A second wire may be used to connect your amplifier’s Remote
Out jack to the remote input of another stereo component. Continue this process to
include additional components (if compatible).
Connecting Speakers
For best performance, use high-quality speaker cables. However, ordinary copper wire 3.
can be used if the gauge meets the following requirements:
Wire Length Min. Diameter
Up to 8.2 feet (up to 2.5 meters) 1/32" (1mm)
Up to 13.1 feet (up to 4 meters) 3/64" (1.25mm)
Up to 19.7 feet (up to 6 meters) 1/16" (1.6mm)
Above 19.7 feet (above 6 meters) 5/64–3/32" (2–2.5mm)
Avoid rolling excess wire with or near signal interconnects.4.
IMPORTANT
: When connecting two pairs of speakers, determine the impedance of each
pair by looking on the back of the speakers or in your owner’s manual, or by contacting
your dealer or manufacturer.
You can listen to two pairs of speakers at the same time ONLY if the impedance of
EACH speaker is NOT LESS THAN 8 ohms.
WARNING
: Do not play sets of speakers simultaneously except as recommended above.
Amplifier may overheat.
AC Power
Plug the cord into a 120V AC wall outlet. The Power indicator will light up to indicate
power on. To disconnect the power input completely, the main plug must be disconnected
from the mains.