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Inst allat ion Considerat ions
HDL-4 Power Handling
The HDL-4 is designed for use with a receiver or amplifier
having a maxim um 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 N iles
dealer, or receiver/ amplifier m anufacturer, 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 im pedance will be 4 ohms; two pairs of
4-ohm speakers in parallel become 2 ohms, and so on.
M ost receivers or amplifiers are not rated for use below a 4
ohm load. M ost manufacturers do not recommend connect-
ing more than two pairs of speakers without using some
form of im pedance 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 tim e.
4
H
IGH
D
EFINITION
S
PEAKER
S
ELECTION
S
YSTEM
TOOLS
REQUIRED
1/8" Standard
Slotted Screwdriver
Wire Stripper
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