User Manual

12
High-impedance connections
(PC-DI series only)
The PC-DI series also supports high impedance (100V/70V
line).
 Number of speaker systems that can be
driven
As long as the total rated input of the speaker systems used
is within the output value of the power amplifier, any number
of speaker systems can be connected in parallel.
When using high-impedance connections, the rated input of
the speaker system is determined by the settings of the
speaker transformer used with the speaker system.
If using the 600W output PC406-DI with a speaker system
whose rated input is 20W due to the attached speaker trans-
former, calculations(*) show that we can use up to 30
speaker units per channel, and up to 120 speaker system
units for the total of four channels. A combination of speaker
systems with different rated input can also be connected.
* In consideration of impedance variance in the primary side of the
transformer, future change in transformer tap, and future addition
of speakers, we recommend that you allow a margin of about 20%.
Power supply connection
1. Connect the included power
cord. First connect the power
cord to the unit, and then con-
nect the power plug to an electri-
cal outlet.
When connecting the power cord,
insert it all the way, and then twist it
clockwise until you hear the click.
When removing the power cord,
pull the latch toward yourself, turn
the connector counterclockwise,
and remove it.
Switching the power between standby/on
 Standby  power on
1. Hold down the power switch for two seconds or longer.
The power turns on, and the button changes from blink-
ing to lit (green). The HOME screen (VOLUME) appears.
 Power on  standby
1. Press the power switch.
The display shows a confirmation message.
2. Turn the main knob to select “YES,” and then press
the main knob to confirm; the power switches to
standby mode.
WARNING
You must use the included power cord. Do not use
the included power cord with any other product.
Doing so may cause malfunction, overheating, and
fire.
CAUTION
Before connecting or disconnecting the power cord,
you must turn off the power switch.
NOTICE
Position the power cord so that the rear exhaust does not con-
tact it directly. The temperature of the rear exhaust might cause
the power cord to deform.
20W 20W 20W 20W 20W 600W
70V/100V
Speaker transformer
Power
cord
to AC outlet
AC IN connector
Rapidly turning the unit on and off in succession by power plug
can cause it to malfunction. After turning the unit off by power
plug , wait for more than five seconds before turning it on again.
CAUTION
To prevent loud noise from being emitted from the
speaker when the power is turned on, power-on each
unit in the order of audio sources, mixer, and finally the
amplifier. When turning the power off, reverse this
order.
The settings at the time the power was turned off (the state when
disconnected from the AC outlet) are saved. The next time the
power is turned on, the unit starts up with those settings.
NOTICE
If this product is connected to an AC outlet, it is in standby
mode, and current is flowing to the product at the minimum
level.
If you will not be using this product for an extended period of
time, be sure to disconnect the power supply plug from the
AC outlet.
NOTE
NOTE