Rodec PA1600, Руководство по эксплуатации

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RODEC
PA 800
-
PA 1600
-
PA 2400
5
D) Ground lift switch
Switch to make an interuption between the signal ground and the mains ground. Can be used
to avoid hum.
E)
Mode switch
Switch to chose the operating mode of the amplifier. There are 3 modes available:
- Stereo (2 channel operation with 2 different input signals)
- Parallel (2 channel operation with the same input signal)
-
Bridge (1 channel mono operation with higher output power).
F)
Limiter switch
When the limiter switch is set on the possition “ON”, the limiter is out of the signal path until
the on-set of clipping of the output signal wave. At that time the action of the limiter is to
reduce the amplifier's gain to preserve un-clipped output signal. When the switch is on the
“DEFEAT” position, the limiter is out of the signal path and the signal will not be limited.
G)
Speakon speaker outputs
Speakon type output connectors. One connector per channel. These outputs must be used
when the mode switch (E) is on “stereo” or “parallel” mode. The positive loudspeaker terminal
is connected to pin “1+” of the Speakon connector. The negative terminal of the loudspeaker
has to be connected to pin “1-“ of the Speakon connector. The pins “2+” and “2-” are not
connected.
H)
5-way binding post speaker outputs
Speaker terminals to connect bare speaker cables. Red binding posts are “HOT” and must be
connected with the positive pole of a speaker in “stereo” or “parallel” mode.
Black binding posts are “COLD” (ground) and must be connected with the negative pole of a
speaker in “stereo” or “parallel” mode. In “brigde” mode the speaker must be connected to
both red binding posts, the positive pole of the speaker to the red binding post of channel 1
and the negative pole of the speaker to the red binding post of channel 2.
I)
Speakon bridge output
Speakon type output connector used when the amplifier is in bridged mode. The positive
terminal of the loudspeaker is connected to pin “1+” of the Speakon connector. The negative
loudspeaker terminal is connected to pin “1-“ of the Speakon connector. The pins “2+” and “2-”
are not connected. This output must be used when the mode switch (E) is on bridge mode.
OPERATING INSTRUCTIONS
1)
Please read the safety instructions first!!! Be sure that the amplifier is turned off (1), then
connect the input- and output connectors or wires properly. Turn the level adjusters (6) fully
counter clockwise (position -80dB).
2)
Then put the switches on the back panel in the desired position.
- The input ground switch (D) must normally be placed on the position “GND”. If there is a
ground loop (hum sound) when you switch on the amplifier, it can be avoided by switching
the ground switch to “lift”.
- The mode switch (E) is normally placed on the position “stereo“, in this mode the amplifier
can be used to amplify 2 different input signals (CH1 and CH2) on both amplifier
channels. In the stereo mode, the impedance of the loudspeakers must be at least 2
ohms.
The mode “parallel” is used to amplify 1 input signal (CH1 or CH2) on the 2 amplifier
channels. So both channels amplify the same signal. In this mode, the impedance of the
loudspeakers must be at least 2 ohms.
Mode “brigde” is used to amplify 1 input signal (CH1) on a combination (summons) of both
amplifier channels. So there is only 1 output (speaker) signal. In bridge mode the
impedance of the loudspeaker must be at least 4 ohms.