RCF UP 2161 Power Amplifier (160W) - Manuale (Pagina 11)

11
ENGLISH
LOW IMPEDANCE OUTPUT (4 Ω )
The loudspeaker total impedance shall not be lower than 4 Ω .
n
ote
: a total impedance equal to 4 Ω allows the amplifier maximum power delivery. A
higher impedance leads to a reduction of the power delivered by the amplifier (e.g. 8
Ω : approx. ½ power, 16 Ω : approx. ¼ power).
An impedance lower than 4 Ω overloads the amplifier.
Loudspeaker models shall be chosen by considering the max. power (UP 2081: 80 W on
a 4
Ω load, UP 2161: 160 W on a 4 Ω load, UP 2321: 320 W on a 4 Ω load) that the
amplifier can deliver.
Loudspeaker line should be as short as possible; long cables may need large wire cross-
sections.
Do not use, at the same time, both the low impedance output (4
Ω ) and the constant
voltage output (100V or 70V), as this overloads the amplifier.
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Make sure the device is not connected to the mains (unplug the power supply cable).
Remove the lid.
In the picture 1, the voltage change connector is highlighted by a square.
If the mains voltage is 230 V, set the connector to the 230Vac position (see the picture 2),
according to the PCB indication (looking at the connector front, the central pin is connected
to the right one).
If the mains voltage is 115 V, set the connector to the 115 Vac position (see the picture 3),
according to the PCB indication (looking at the connector front, the central pin is connected
to the left one).
Refit the device lid.
Before connecting the device to the mains, make sure that the fuse (inside the IEC power
supply connector of the rear panel, see 13) is the correct current rating for the mains
voltages (read the fuse indication below the connector).
PICTURE 1
PICTURE 2
PICTURE 3
POWER SUPPLY VOLTAGE CHANGE
IMPORTANT