Multiple Speaker Loads
The SI-245 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-245. Note that the SI-245 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 systems.
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 speak-
ers in the bedroom are off so you can avoid waking a sleeping spouse! These speak-
er 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-245 amplifier.
INSTALLATION CONSIDERATIONS
7
Niles HPS-6 Speaker Selection System
Speaker selection systems allow each pair of speakers to be turned on and off from your
equipment location.
12
INSTALLATION
Speaker Wire Connections
CAUTION! All speaker wire connections must be made with the amplifier Off.
Bare Wire
Unscrew the red or
black plastic knob,
insert the bare wire
end into the opening,
and then tighten the
knob until the wire is
securely clamped.
Banana Plugs
There are many types
of banana plugs, some
crimp, some solder.
The Niles gold banana
plug has a quick-con-
nect binding post for
the bare wire on the
body of the plug. A
banana plug is simply
inserted into the jack
at the end of the ampli-
fier’s binding post.
Dual banana plugs
will fit the SI-245 bind-
ing posts.
STEP
1. Label all wires.
2. Connect one stripped wire end or
banana plug to the black terminal
and one to the red terminal.
CAUTION- Avoid even a single strand
of wire touching the chassis or another
connector.
DESCRIPTION
If you label the wires for their destination,
rather than which terminal of the SI-245 they
are connected to, it will be easier to recon-
figure your system in the future.
A. Split the speaker wire insulation so that
at least two inches of each conductor are
separated.
B. Strip one half inch of insulation from the
end of each conductor of the speaker wire
C. Attach banana plugs or twist the strands
of wire together and insert them into the
appropriate binding post.
Niles SI-245
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