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Setting Input Level
Adjust the input level as follows:
1. If necessary, unplug the remote plug from the unit.
2. If connecting the amplifier to a system with
adjustable volume, set the volume to its lowest point.
Then adjust the level potentiometer fully counterclockwise to its minimum setting.
3. Set the system volume to its maximum level. No sound should come out.
4. Slowly increase the amplifier level until sound distortion starts to occur. Lower the level
slightly until the distortion disappears. This setting ensures that, whatever the system
volume setting may be, no clipping occurs.
Setting Bass and Treble
Adjust the bass and treble as follows:
1. Use the bass potentiometer to increase or decrease the bass shelving ±10 dB at
100 Hz and below.
2. Use the treble potentiometer to increase or decrease the treble shelving ±10 dB at
10 kHz and above.
NOTE: Turning the bass or treble potentiometers counterclockwise will decrease the
output at the specified frequencies. Turning the potentiometers clockwise
will increase the output. When the potentiometer is at the center detent, flat
response is achieved.
BASSLEVEL TREBLE
MINI POWER AMPLIFIER
MPA 401
MPA 401-70V and MPA 401-100V • Setup and Operation 8