CONNECTIONS:
OUTPUTS-
DISTRIBUTED HIGH IMPEDANCE (HI-Z) , BRIDGE MODE
OUTPUT TERMINAL SAFETY WARNING!
Do not touch output terminals while amplifier power is on. Make all connections with amplifier turned off.
Risk of hazardous energy!
BRIDGE mode operation combines the output power of both channels into one channel that has twice the “normal” voltage swing. This
means that in BRIDGE mode, the high impedance distributed outputs can provide 140 volt (70 volt + 70 volt) and 200 volt (100 volt +
100 volt) drive. There are not many drivers (speaker loads) that operate at 140 or 200 volts, but if required, the ISA “T” models can
easily be configured to fit the application.
140 and 200 volt bridging may be useful for installations where two 70 volt or two 100 volt drivers are connected in series. An example
of each of these situations is provided, below. Consult local and national electrical codes to ensure that proper wiring materials and
methods are used.
BRIDGE CONNECTION TO DISTRIBUTED OUTPUTS-
200 Volt Bridge
Connection
140 Volt Bridge
Connection
200 volt line:
Connect the 200 volt line between the CH1
100
terminal and the CH2
100
terminal.
Note that the positive (+) terminal is connected to
channel 1’s 100 volt terminal and the negative terminal
is connected to channel 2’s 100 volt terminal.
Ensure proper polarity is maintained at all connections.
Note polarity of connection between the two drivers in
series.
140 volt line:
Connect the 140 volt line between the CH1
70
terminal and the CH2
70
terminal.
Note that the positive (+) terminal is connected to
channel 1’s 70 volt terminal and the negative terminal is
connected to channel 2’s 70 volt terminal.
Ensure proper polarity is maintained at all connections.
Note polarity of connection between the two drivers in
series.
NOTE! When the MODE SWITCHES are set to BRIDGE mode, all output connections are configured for bridge mono
operation. All output connections (low impedance direct AND high impedance distributed) must be made bridged.
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Class 2 wiring may be used. For bridged mono and 100V distributed outputs, class 1 wiring must be used.
