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P429 operation
CH3
CH3
POWER / STANDBY
CH2
CH1
4–16 OHMS. CLASS 2 WIRING
IN4
IN3
IN2
IN1
3/4 MODE
ST/DM/BR
TRIM
TRIM
5V
100mA
4
3
2
1
OUT4
OUT3
OUT2
OUT1
CH2
CH1
4–16 OHMS. CLASS 2 WIRING
IN4
IN3
IN2
IN1
3/4 MODE
TRIM
TRIM
5V
100mA
ST/DM/BR
4
3
2
1
OUT4
OUT3
OUT2
OUT1
Switching on
The POWER button switches the unit on and off.
The power light (next to the 'POWER / STANDBY' text)
indicates the state of the amplifier: if it changes from
red to orange then green if mains power is connected
and the unit is switched on.
POWER
Mode switches
These switches allow the two pair of amplification
channels to be independently configured in three
different modes.
1/2 MODE
ST/DM/BR
Level trim
These trims allow each channel output level to be
adjusted in order to compensate for differences in
speaker output levels due to their position within the
listening environment.
In normal use, these trims should all be set to the fully
1/2 MODE
clockwise position.
ST/DM/BR
E-9
In ST (Stereo) mode, each output channel is fed
<
from its respective input and would be used to
drive four independent speakers. As an example,
please refer to "Single wiring" on page E-10
In DM (Dual Mono) mode, CH1 and CH2 are fed
<
from the CH1 input only, while CH2 is not used.
Similarly, CH3 and CH4 are fed from CH3 only,
while CH4 is not used. This would be used to
drive two independent speakers in a bi-amped
configuration. An example of this is shown in
"Dual mono / Bi-Amping" on page E-11
In BR (Bridged) mode, CH1 and CH2 are bridged
<
together and are fed from CH1 only, while CH2
is not used. Similarly, CH3 and CH4 are bridged
together and are fed from CH3 only, while CH4
is not used. This would be used to drive two
independent speakers in a bridged mono setup.
An example of this is shown in "Bridged mode"
on page E-12
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