Magna Alert 120, Manual

Page: 12 / 16

Operation
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 at least 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.
NOTE:
• The built-in FM Tuner, USB/SD MP3
and Bluetooth connection volumes are
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 Mic 1 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 (a
squealing or howling noise). If VOX is enabled
by setting the priority DIP switch to Mic 1,
audio playback 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 on the
front of the unit. The player will automatically
scan the USB/SD and play any MP3 music
file that is stored. Note: the USB port on the
rear of the unit is for programming the alert
message only, and will not work with the MP3
player.
Play, FF, RW, next track, next folder controls
are all available via the remote control.
FM Tuner
Press the mode select button to switch to the
FM tuner function. Use the Previous or Next
buttons to select a stored channel.
Tuning and Storing stations
Use the Forward/Reverse seek buttons to
manually tune the frequency in steps of
0.05MHz. Alternatively, press and hold the
Forward/Reverse seek buttons to auto search