Installation Considerations
HDL-4 Power Handling
The HDL-4 is designed for use with a receiver or amplifier
having a maximum power output of 250 watts per channel
at 8 ohms. Damage caused by the use of a higher-power
receiver or amplifier will void the warranty. Consult your Niles
dealer, or receiver/amplifier manufacturer, if you are uncer-
tain about the power rating of your receiver or amplifier.
Amplifier Impedance Load
As more pairs of speakers are parallel connected to a receiver
or amplifier, the overall system impedance becomes lower.
For example, if two pairs of 8-ohm speakers are connected
in parallel, the impedance will be 4 ohms; two pairs of
4-ohm speakers in parallel become 2 ohms, and so on.
Most receivers or amplifiers are not rated for use below a 4
ohm load. Most manufacturers do not recommend connect-
ing more than two pairs of speakers without using some
form of impedance correction.
The HDL-4 includes impedance correction circuitry which
protects your receiver or amplifier from low impedance
loads. The circuitry assures that your receiver or amplifier will
see a safe operating load, even when all four speaker pairs
are playing at the same time.
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H
I G H
D
E F I N I T I O N
S
P E A K E R
S
E L E C T I O N
S
Y S T E M
TOOLS
REQUIRED
• 1/8" Standard
Slotted Screwdriver
• Wire Stripper
