Niles SI-1230 Installation & Operation Manual page 21

Bridging Two Channels Into One (continued)
STEP
2. Connect the speaker wires to
the two Bridged speaker terminals
(BRIDGED +, BRIDGED -). Observe
proper polarity markings.
CAUTION! DO NOT connect a speak-
er selector or headphone junc-
tion box to the output of a bridged
channel pair.
3. Use the EVEN NUMBERED input,
input DIP switch, and level control for
connections and configuration.
BusMatrix TM Input Switch Setting
Each channel has a dedicated BusMatrix DIP
switch that assigns that channel's source. To
assign a signal from the Main Bus Input, select
one of the first three switches which will give
you either Left (L), Right (R) or Mono (L+R).
To assign the channel's dedicated input select
the fourth switch. Only ONE switch should be
selected to the "ON" position.
STEP
1. Move only ONE switch to the "ON"
position for each channel.
DESCRIPTION
Connect your speaker wire only to the
red terminals of the two adjacent ampli-
fier channels. If one of the speaker wires
touches a black terminal (thereby ground-
ing the red "hot" terminals) you will short
circuit the amplifier.
These connections to a bridged channel
pair will result in either thermal shutdown
or poor quality sound.
When two channels are bridged into one,
make sure that the odd numbered input
DIP switches are all in the "off" position.
"OFF" Position
MAIN
BUS
INPUT
L
L
R
R
DESCRIPTION
CAUTION! The DIP switch physically allows
you to move all four of the switches to the
"On" position. If you accidentally set more
than one switch "On" , you will create an
undesirable mix of inputs on the entire bus.
"ON" Position
L
BUS R
L+R
1
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