8
Figure 4. Group Mode
INSTALLATION
PREAMPLIFIER POWER CONNECTIONS
An 8' (2.8m) DC power cord is supplied to connect the power supply unit to the
preamplifier unit. This cord can be identified by the 9 pin circular connectors at each
end.
Please note that the DC power cord should be connected before the AC power is turned
on. This prevents incorrect power sequencing which can cause damage to the audio
circuits.
To avoid any interference with the low level audio circuitry, the power supply should be
located at least 3' (1m) from the preamplifier unit.
A standard AC power cable is included. For safety, it is recommended that the cord be
connected to a grounded outlet (please see grounding options next page).
AC input voltage settings can be adjusted for 100V, 120V, 220V and 240V operation at
50-60Hz. If your voltage is 230V, use the 240V setting. From the rear of the power
supply unit, open the trap door next to the IEC power inlet with a small screwdriver.
Carefully pull the voltage select cam straight out and then insert with the desired voltage
showing. Do not try to rotate the cam while it is in the power input module. Replace the
fuses with the proper value selected from the table below. Be sure to use a GMC type
time delay or fuse with a 250V rating.
Voltage
100V
120V
220V
240V
Fuse rating
0.75A
0.75A
0.5A
0.5A
Figure 5. Fuse value table
