Wiring Diagrams
Operation Steps
When all connections to the amplifier are made, turn all the volume controls to the MIN position and
then switch ON. The “ON” LED will illuminate. Turn BASS and TREBLE controls to the 12 o’clock
position (pointing straight up) and turn MASTER rotary control up Quarter way for testing.
Ensure a signal is being fed to one of the line inputs 1, 2, 3 or 4 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.
REMEMBER: The initial built-in USB/SD/FM audio player volume is controlled via the IR remote
control. The output of the amplifier is represented on the level meter LEDs and care should be taken
that the Red “Clip” 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 MIC1 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 2-5 will
be reduced in volume automatically when speaking into Mic1, Use the volume to control primary
sound 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.
USB/SD Playback
Push a USB pen drive into the USB port and/or an SD card into the SD card input The Amplifier will
automatically scan the USB/SD and play any music file that is stored.
Play, FF, RW, next track, next folder is all the remote control.
