* Professional Sound System
Conference Amplifier
2
II Appearance description
2.1 Front panel description
①
CH-1 input level adjustment knob
Adjust the knob to the desired volume level. When away from the speaker and you can not directly hear the
volume size , then you can refer to the scale on the panel for volume adjustment. (Use this knob only when
bridging or parallel mode)
②
Power Switch
When you press this button, the power amplifier soft start anti-surge impact circuit begins to work. About 3 to
4 seconds after the "Kacha" sound, soft start work is completed, and then about 1 to 2 seconds after the
"Kacha" sound for the amplifier having been connected to the speaker and entering the working state.
③
CH-2 input level adjustment knob
Adjust the knob to the desired volume level. When away from the speaker and you can not directly hear the
volume size , then you can refer to the scale on the panel for volume adjustment. (Use this knob only when
bridging or parallel mode)
④
Machine working status indicator
：
PRO
: CH-1, CH-2 protection indicator (yellow). There are three situations that the indicator lights up:
1) 3 to 5 seconds after the start and shutdown, the power amplifier in the unstable work, the amplifier away
from the speaker.
2) When the operating temperature of the power device exceeds 90 degrees.
3) When the amplifier appears abnormal condition
CLIP
: Peak indicator (red). There are two situations that the indicator lights up:
1) When the output power of the amplifier reaches the maximum value and the clipping occurs, the indicator
on, and the input level should be reduced accordingly.
2) When there is a signal input and the speaker no sound, the indicator lights continuously, then determine the
load short circuit. It should turn off the power amplifier and remove the short circuit and then resume work.
SIG
: CH1 / CH2 output signal indicator (red). When the amplifier into the normal working state and has
signal output, the indicator light.
BRI
: Bridge operating mode indicator (green). When the amplifier is in the bridge operation mode, this
indicator light, then the input signal only applies to CH1.
STR
: Stereo mode indicator (green). This indicator lights when the amplifier is operating in stereo mode.
①
②
③
④
