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Multiple Speaker Loads
The SI-275 is stable into very low impedance loads. This means you can safely
operate three pairs of 8 ohm speakers (a 2.67 ohm load) directly connected to
the SI-275. Note that the SI-275 does not have on/off speaker switching built in.
When the amplifier is on, so are all of the speakers.
Niles makes a number of different speaker selection and impedance matching sys-
tems. Speaker selection systems allow each pair of speakers to be turned on and off
from your equipment location (or even via remote control). That way, you know that
the speakers in the bedroom are off so you can avoid waking a sleeping spouse! These
speaker selectors provide an easy way to terminate all of the wires for more than three
pairs. Testing and troubleshooting a new system is much easier with the individual
room labels and on/off switches of a Niles speaker selection system. Additionally,
Niles speaker selection systems offer impedance matching features which will allow
you to connect up to ten pairs of speakers to your SI-275 amplifier.
INSTALLATION CONSIDERATIONS
7
SPEAKER 6
L+ L- R- R+
AMPLIFIER
L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+
SPEAKER 5 SPEAKER 4 SPEAKER 3 SPEAKER 2
L+ L- R- R+
SPEAKER 1
CONSTANT
PROTECTION
ONOFF
Niles Audio
Corporat ion, Inc.
Miami, Florida USA
NILES
Niles SI-275
Niles HPS-6 Speaker Selection System
Speaker selection systems allow each pair of speakers to be turned on and off from your
equipment location (or even via remote control).