Bridging Two Channels Into One - Niles SI-1230 Installation & Operation Manual

INSTALLATION

19 Bridging Two Channels into One

20 BusMatrix
21 Setting The Turn-On Mode Switch
21 The Control Output
22 Speaker Wire Connections
CAUTION! ALL CONNECTIONS AND REAR PANEL SWITCH SETTINGS
SHOULD BE MADE WITH THE AMPLIFIER'S FRONT PANEL MASTER POWER
SWITCH OFF.
Bridging Two Channels into One
The SI-1230's bridging switches allow you to create a more powerful amplifier
channel by combining or "bridging" two adjacent channels.
BUS
STEP
1. Choose which of the six pairs you
wish to bridge and move the bridging
switch for that pair to the
position (toward arrow).
CAUTION! Do not connect a speaker
load of less than eight ohms to a
bridged channel.
19
TM Input Switch Setting
1
BRIDGED
LEVEL LEVEL
USE CH 2
WHEN
BRIDGED
L
R BUS
L+R
1
23 Line Level Audio Inputs
23 Cascade Audio Outputs
24 AC Power Plug
24 Rail Fuse Holders
Slide the bridg-
2
ing switch in the
direction of the
arrow to bridge
two adjacent
amplifier chan-
nels. Set the
controls of the
newly bridged
L
pair by using the
R
EVEN numbered
L+R
2
channel.
DESCRIPTION
The 12 channels are grouped into 6 pairs
(e.g. 1 & 2). Only the two channels within a
" "
pair can be bridged. Thus, only channels 1
Bridged
and 2, or channels 3 and 4 could be bridged.
You cannot bridge 2 and 3 for example.
A bridged channel on a SI-1230 is
designed for an eight ohm minimum load.
Connecting a speaker with a nominal
impedance of less than 8 ohms may cause
the SI-1230 to go into protection or be
damaged.
When two channels are bridged
together, connect speakers to the
two terminals labeled "Bridged".
BRIDGED – -
1
BRIDGED +
+
2