Niles Audio SPEAKER SPS-4 - Manual (Page 6)

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.
The actual impedance load the SPS-4 presents to your receiv-
er or amplifier will vary, depending on how many speaker
pairs are playing and the impedance rating of each speaker.
If you have four pairs of 8-ohm speakers playing, the SPS-4
will present a 4.5 ohm impedance load to your
receiver/amplifier. With four pairs of 4-ohm speakers playing,
the load drops to slightly under 4 ohms.
If you intend to use the SPS-4 with more than 2 pairs of
4-ohm speakers, it is recommended that you verify that the
receiver or amplifier is capable of driving a 4-ohm load.
Consult your Niles dealer, or receiver/amplifier manufacturer,
if you are uncertain about the capabilities of the
receiver/amplifier.
Type of Speaker Wire
For most applications, we recommend you use 16 or 18
gauge, stranded copper speaker wire for the SPS-4 connec-
tions. For wiring runs longer than 80 feet, 14 gauge wire is
recommended. Using speaker wire larger than 14 gauge for
the SPS-4 connections is not recommended—the wire may
not fit into the connectors. Never use solid-core, aluminum,
or "Romex" type wire with the SPS-4. When running speaker
5
S
P E A K E R
S
E L E C T I O N
S
Y S T E M
"TECH TIP"
Wire size is
expressed by it's
AWG (American
Wire Gauge)
number. The lower
the AWG number,
the larger the wire,
i.e., 12 AWG wire is
physically larger
than 14 AWG.