Alto PM-8 DRAGONFLY User Manual page 9

4.1 The MONO MIC/LINE channels
These are Channel 1 through Channel 4. You can connect a balanced, low
impedance microphone to the XLR socket. On the 1/4" phone jack you can
connect either a microphone or a line level instrument. You shall never connect
an unbalanced microphone to the XLR socket if you do not want to damage
both the Microphone and the Mixer, when Phantom power is switched on.
18 Volt phantom power
It is available only to the XLR Mic sockets.Do not connect non-phantom
equipment to the MIC input when phantom power is on. Before turning
phantom power on, make sure that all fades are all the way down. In this way
you will protect your stage monitors and main loudspeakers.
4.2 MONO CHANNEL INSERT
Insert sockets are provided for all mono MIC channels. It can
allow you patch external signal processing devices into signal path
via a TRS connector, the signal will be taken out after the input
gain control (TRIM), and sent to an external processor such as a
compressor- limiter, then returned into the same channel imme-
diately before the EQ section.
Note: Usually, insert connections require a special stereo-splitting
Y-cord to be connected, known as TRS connector (Tip Send/Ring
Return).
4.3 INPUT LEVEL setting
This Control is provided with 2 different indication rings: One is
for the Microphone and the other for the Line levels. When you
use a microphone you shall read the OUTSIDE ring (0-44 dB),
When you use a Line level instrument you shall read the INSIDE
ring (+15~-30 dB). For optimum operation you shall set this control
in a way that the peak LED will blink also occasionally in order to
avoid distortion on the input channel.
4.4 LOW-CUT FILTER
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 function to reduce hum and stage rumble when using microphones.
1
5
2
3
4
8
MIC 1
2 1
3
BAL OR BAL OR
UNBAL UNBAL
LINE IN
1
INSERT
TRIM
LOW CUT
+15dB LINE -30dB 75Hz
18dB/Oct
0dB MIC 44dB
ON OFF
PHANTOM
1
2
3
4
5