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5
R150 PLUS/300 PLUS/500 PLUS
REFERENCE AMPLIFIER
E n g l i s h
Front Panel
Front Panel
1. LEVEL CONTROL
This determines the level of the input signal for each channel. In stereo mode the knobs will determine the signal level
independently for each channel. In the bridge mono mode only the channel 1 level control is used.
2. SIGNAL INDICATOR
This indicates the level of the input signal. This should be illuminated during normal operation.
3. CLIP INDICATOR
This LED warns of a problem in the system when illuminated. Reduce the LEVEL of the device which supplies
signal to the amplifier or reduce the LEVEL control(s) on the amplifier. This LED should not be illuminated
during normal operation.
4. PROTECTION INDICATOR
This LED warns of a problem in the system when illuminated. Reduce the volume and look for problems. It is
possible that the amplifier is too hot or the speaker impedance is too low. This LED should not be illuminated
during normal operation.
5. POWER INDICATOR
This LED indicates the amplifier is switched ON and receiving AC POWER when illuminated.
6. POWER SWITCH
The position of this switch determines whether the power is ON or OFF. The power-on status is confirmed by
the power indicator. Amplifiers are always the last item in a system to be turned on. It is a good idea to turn
down the level controls before applying AC mains power.
7. HANDLE
Handles are provided for moving and installing into equipment enclosures or racks.
POWER
OFF
ON
POWER
OFF
ON
LUS
P
NN
POWER
PROTCLIPSIG
19
17
22
13
10
01
229
54
15
11
12 98
7
5
4
3
6
PROTCLIP
SIG
19
17
22
13
10
01
229
54
15
11
12 98
7
5
4
3
6
REFERENCE AMPLIFIER
5432167
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