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OPERATION STEP
When all connections to the amplifier are made, turn all rotary controls down and switch on the power and a power “ON” LED
will illuminate. Turn BASS and TREBLE controls to the 12 o’clock position (pointing straight up) and turn MASTER rotary
control up part way for testing.
Ensure a signal is being fed to one of the line inputs 1, 2, 3, 4, 5, 6 or 7 and gradually increase the volume control for that
channel until the output is heard through the speakers. Turn up the MASTER to the maximum required volume level and
reduce the channel volume control if necessary.
Note: The initial test can be made using the built-in USB/SD/FM audio player. The output of the amplifier is represented on the
level meter LEDs and care should be taken that the Red “0” LED is only lit momentarily during use. Anything longer than a short
flash of this LED may be indicating distortion or clipping of the output signal and the MASTER should be turned down.
If a microphone is connected to MIC2-4 input, make sure it is switched on and if it requires phantom power, make sure this
feature is enabled. Gradually increase its volume control whilst speaking into the microphone until the required volume level is
reached. The microphone should not be able to “hear” the speakers, which can cause feedback (squealing or howling noise).
If the VOX feature is enabled, audio playback through channels 2-6 will be reduced in volume automatically when speaking into
MIC 1, use its attenuator to increase or decrease the mute level.
In addition to channel and MASTER volume controls, there are BASS and TREBLE EQ controls to adjust the tone of the overall
output. At the 12 o’clock position, these controls are applying no effect to the signal (no boost or cut). Moving the BASS control
clockwise boosts the low frequencies in the audio, whilst moving it anticlockwise will cut these low frequencies. Likewise,
moving the TREBLE control clockwise boosts the high frequencies in the audio, whilst moving it anticlockwise will cut these
high frequencies. Adjust these EQ controls to suit the type of audio signal or compensate for the room acoustics.
Media Player
The mixer-amplifiers are built-in a built-in media player which includes Mp3/FM/Bluetooth. Pressing the Mode button to switch the
media player among Mp3/FM/Bluetooth according to the LED display, where there is one IR remote control enable to operate the
media player remotely around 10 to 30 meters, this media player output volume control also could be controlled by the “TEL” volume
knob.
Bluetooth
The Bluetooth function allows connection of a smart phone or tablet to the media player section for playback of stored files or
streamed digital audio. In order to enable this function, it will be necessary to pair the sending device to the receiver as follows.
1. Open the Bluetooth settings menu on the smart phone or tablet (or other sending device)
1. TF card input
2. LED display
3. IR sensor
4. USB input
5. Mode to select MP3/BL/FM
6. Play
7. Folder
8. RPT repeat
9. Previous & volume- decrease
10. Next & increase
