09
10
Operation instructions:
V
+
V
-
D. MP3 playback
1. The USB port has an automatic playback capability. It will automatically search the USB storage device
and play any compatible MP3 tracks.
2
、
Press corresponding buttons to navigate playback (play/pause, next, back).
3、
Hold corresponding buttons to adjust volume.
Step-by-Step Instruction:
A. Connecting loudspeakers
1. Ensure power switch is at the OFF position.
2. Connect power cord to power soruce outlet.
3. Determine and prepare the appropriate speaker wire (gauge, insulation type, length).
4. Connect speaker to the appropriate wiring terminals, as instructed in the previous section.
5. Turn down all volume knobs and then turn on power switch.
B. Audio device input
1. Turn down volume before plugging in a new input device.
2. Adjust volume to the desired level.
3. When MIC1 input is plugged in, other input channels will be automatically muted. Only plug in
MIC1 when actively utilized.
C. Power down
1. Turn down the volume knob before turning off the amplifier.
2. After turning off the amplifier, please wait at least 5 seconds before turning on again.
Switching the power on and off in quick sucession may cause device failure.
Troubleshooting
Symptom
Cause & Solution
1. Power does not turn on.
1. Power source is disconnected or cut.
2. Protection mode is activated.
4. Volume is low.
5. Sound is distorted.
1. Input level of microphone or external device is too high.
2. Volume level is too high.
2.No sound output.
1. No power is connected.
2. Fuse is blown and needs to be replaced.
3. Volume is turned off completely.
4. No active input.
5. MIC1 (priority) is plugged in but inactive.
6. USB device is plugged in but no MP3 track is found.
3. Sound suddenly stops or is
intermittent during playback.
1. Protection mode is activated due to overheating.
Please wait a few minutes to restart.
2. Poor or broken wire connection.
1. A high-impedance loudspeaker (4-16Ω) is connected to
a low-impedance (70v/100v) output.
2. MIC1 is plugged in but inactive.
3. Volume needs to be turned up.
