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3
Clip LED
Red LED, When the signal distortion reaches or surpasses 0.5%, the Led lights up. This means the output level of
signal source is too high and it is time to reduce input level until clip led lights off.
4
Protection LED
Red LED, D1, D2, D3, D4 each has four protection functions. They are respectively short-circuit protection, over-
load protection and over heat protection. If one of the protections is activated, the protection LED lights up. If the
unit works well, the protection LED lights off.
SIGNAL, CLIP, PROTECTION LED on 2-channel models
SIGNAL, CLIP, PROTECTION LED on 4-channel models
CH 1
2
3
5
Gain Control
Turn the gain control clockwise to increase gain and counter clockwise to decrease gain. The maximum voltage
gain for each model is shown on the front panel. The gain control are marked in dB.
Gain Control on 2-channel models
3.2 Rear Panel (take the rear panel of D4 as an example)
6
Power Supply Socket
It is used to connect power cord, after setting the proper voltage, connect one end of power cord with the unit
and another end with mains.
CH 1
2
3
CH 2
4
2
3
5
CH 2
4
2
3
CH 3
4
2
3
Gain Control on 4-channel models
5
4
CH 4
4
2
3
5
4