USER MANUAL
MPA 60
Media player amplifier
Front panel operation
INPUT LEVEL CONTROL
These rotary knobs are designed for adjusting volume level of the Input 1, input
2 and input 3. First three inputs can be used for microphone or line level audio.
The gain of this inputs can be adjusted in rear panel.
AUX INPUT
This is 3,5mm stereo Jack input for connecting audio from mobile device, lap top
or PC. Audio level of this input can be controlled by using input 3 level control.
Gain of this input is fixed and can not be adjusted.
TONE CONTROL
The separate tone controls provide attenuation of bass and treble response. The
flat position is obtained when the knobs are set to middle position. Turn bass
control knob (BASS) and treble tone control knob (TREBLE) clockwise to raise
tone level approxi10 dB; turn counterclockwise to lower tone level by
approximately -10 dB.
MASTER LEVEL CONTROL
This potentiometer is designed to adjust audio level in the main output.
LED
SIGNAL LED. Signal LED indicates audio signal in the amplifier output. There
are two signal indicators, first indicates audio signal level when it reach -30dBu,
second -20dBu.
CLIP INDICATORS. Yellow LED indicates when amplifier starts distort audio
signal. If the indicator starts lighting continuously the output signal is distorted.
In this case, decrease the audio level by master volume control.
PROTECT INDICATOR. This LED lights up for a few seconds after the amplifier is
powered on and then turns off if the amplifier is not damaged. It is normal for
the protection LED to fade slowly or blink when the amplifier is powered off. If
this indicator starts lighting continuously, turn off amplifier for 10 second and
then turn on again. If LED still indicates after power reset it means amplifier is
damaged and need to send to service for repairing.
06
Operation