Level Set Led - Alto APM10 User Manual

4. CONTROL ELEMENTS
5 MONO IN GAIN
This control is provided with 2 different indications: One is for the MIC and the
other for LINE levels. When you use a microphone, you shall read the MIC ring
(0~-45dB); when you use a line level instrument, you shall read the LINE ring
(+15~-30dB). For optimum operation you shall set this control in a way that
the PEAK LED(18) blinks only occasionally in order to avoid distortion on the
input channel.

6 LEVEL SET LED

This LED will help you to detect the input level
immediately. In this case the research of the
fault will become much faster!
7 LOW-CUT Button
By pressing this button you will activate a 75 Hz
low frequency filter with a slope of 18 dB per octave.
You can use this facility to reduce the hum noise
infected by the mains power supply, or the stage
rumble while using a microphone.
8 STEREO IN GAIN
When you use a line level instrument, you shall read the ring (+20~-20dB).For
optimum operation you shall set this control in a way that the PEAK LED(18)
blinks only occasionally in order to avoid distortion on the input channel.
EQUALISER
There are 3 bands EQ with sweepable MID on all mono input channel
for APM160): HI, MID and LOW band. There are
stereo channel 9-12 (channel13-16 for APM160): HI, HI-MID, MID-LOW and LOW
band. All bands provide up to 15 dB of boost or cut.
-15
-15
800
100Hz
-15
6
EQ
HI
9
12kHz
+15
MID
10
+15
FREQ
8KHz
LOW
13
80Hz
+15
6
5
7
6
8
4 bands fixed frequency EQ on
EQ
9
HI
12kHz
-15 +15
11
HI-MID
3kHz
-15 +15
12
MID-LOW
500Hz
-15 +15
LOW
13
80Hz
-15 +15
LEVEL SET
GAIN
MIC
1
LINE
0 dB -45
+15 -30
LOW CUT
75Hz
18dB/Oct
LEVEL SET
GAIN
9/10
dB
+20 -20
1-8 (channel1-12
the