PHONIC CORPORATION Page 9
MM1705a USER
’
S MANUAL
CHANNEL STRIP DESCRIPTION
Two inputs are available to the mono
input channel, via an XLR connec-
tor (normally for microphone
sources) or a 3-pole 1/4” phone jack
for higher level signals such as key-
boards, drum machines, synths or
tape machines. Both input sockets
are permanently active, and may be
used by simply plugging the source
into the required input. You do not
need to unplug something from the
mic socket if you want to use the
line input. When both the micro-
phone and line signals are plugged
into any channel from CH1 to CH5,
then the circuit will automatically be
switched to line source.
An unbalanced INSERT is offered
which is a break point in the input
channel signal path. It allows the
signal to be taken out of the mixer,
through an external device and then
brought back into the console to
continue through to the final output.
The insert is a 3-pole 1/4” phone
jack, which is normally by-passed.
When a jack plug is inserted, the
signal path is broken at a point just
after the high pass filter, but before
the EQ section. The signal from the
channel appears on the TIP of the
phone plug and is returned on the
RING. The insert point allows com-
pressors, limiters, effect and other
signal processing units to be added
as required to particular input chan-
nels and because it is located PRE
EQ, noise generated by the exter-
nal equipment may be reduced by
a high frequency cut of 15dB in the
equalizer. Only channel 1&2 feature
with inserts.
1 GAIN
This rotary knob adjusts the channel
signal level. Too high, and the signal
will distort as it overloads the channel.
Too low, and the level of back hiss will
be more noticeable and you may not
be able to get a high enough signal level
to the output of the mixer. Proper gain
or gain settings allow the mixer to work
at the best operating level. Adjust the
gain when there is a signal present to
the highest level without triggering the
peak LED. That is the most appropri-
ate position.
This gain adjuster has two indications
to match either a microphone or line
input signal. When you use the micro-
phone input, please refer to the inside
ring from 0~+60 dB; but when you use
line input, please refer to the outside
ring from -20~+40dB.
If you use a condensor microphone,
it is required to send phantom power
to it. The global phantom power
switch is located on the rear panel.
All faders (Group 1, Group 2, Mono,
L/R and CH1~11) should be all the
way down when you switch on the
phantom power. In order to prevent
excessive noise to stage monitor
speakers and main speakers, phan-
tom powered mics should be plugged
in after the phantom power is switched
on.
2 EQUALIZERS
These equalizers are designed to suit
different room acoustics, control feed-
back and improve the live PA sound.
No amount of equalization will correct
the frequency response curve of a poor
loudspeaker. Always begin with all con-
trols in the “0” position and avoid ex-
cessively cutting/boosting large seg-
CHANNEL STRIP
DESCRIPTION
