Niles SI-250 Installation Manual page 9

INSTALLATION CONSIdERATIONS
BRIdGEd mOdE
The Niles System Integration Amplifi er
create a more powerful amplifi er by combining both channels into one (8 ohm
minimum). Stereo mode is the factory default setting.
In the bridged mode, connect the speakers to the left red positive terminal
and the right red positive terminal. In the bridged mode the right channel's red
terminal becomes positive and the left channel's red terminal becomes negative.
DO NOT USE THE BLACK NEGATIVE (-) TERMINALS. THE SIGNAL IS AT THE
RED POSITIVE (+) TERMINALS ONLY.
The line level input signal must connect to the left channel input of the amplifi er
when using bridged mode.
mULTIpLE SpEAkER LOAdS
The Niles System Integration Amplifi er
loads. This means you can safely operate three pairs of 8 ohm speakers (a 2.67
ohm load) directly connected to the amplifi er. Note that the System Integration
Amplifi er does not have on/off speaker switching built in. When the amplifi er is
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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 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 Niles System Integration Amplifi er
NILES AUDIO CORPORATION – 1-800-BUY-HIFI – 1-760-710-0992
9901253-Rev-A-SI-2150Manual.indd 9
2 ChAnnEL, BRIdgABLE PowER AMPLIFIERS
bridged mode switch allows you to
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is stable into very low impedance
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.
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