L
AYOUT AND FUNCTION OF INPUT CHANNELS
4
1. MIC INPUT
The channel microphone(1) is a standard 3-pin female(XLR) connector. Pin one is
ground, pin two is signal high(+), pin three is signal low(-), as per the agreed-upon
international standard. When pushing on phantom swich, +48V will be fed to pin
2,3 of mic connector, which is impossible to use unbalanced microphone.
2. LINE INPUT
The channel line input(2) is a TRS (tip-ring-sleeve) balanced 1/4" phone jack, with
ground wired to the sleeve, signal high(+) to the tip and signal low(-) to the ring.
Input variable range is -20dB ~ +20dB according to position of gain control in case
input connecting, tip is '+', ring/sleeve is 'ground'.
3. INSERT
As a route of channel signal change, the tip carries the signal back of the channel
(the return), and the ring carries signal out to the channel(the send). The channel
jack allows you to insert external processing equipment(such as compressor, gate)
into main signal path of the input channel strip. Insert point is located the front of
HPF(100Hz), EQ, Gain controller you can adjust EQ or HPF to minimize hum.
4. DIRECT OUT
The channel direct out is an unbalanced 1/4" phone jack, connected to the output
of the channel line- amp post-EQ/post fader/post-mute the out signal of each
channel strip is always available at the direct out jack using the direct out does not
interrupt the nomal signal flow through the channel. For recording of channel signal,
connect multi track.
6. PAD SWITCH
When pushing PAD switch for supporting gain volume, input sensitivity of mic/line
will be reduced at 40dB.
During the PAD switch pushing, gain control range is limited within 0 marking.
5. PHANTOM POWER (Only for stage pro series)
Microphone p48V DC) is applied to the channel strips in groups of four.
We suggest that before plugging or unplugging mics, you turn "off" phantom power.
8.
Φ
(Phase) SWITCH
This is for reverting of mic/line input signal phase at 180 in case of misconnecting
"+, -" connector.
7. GAIN CONTROL
This is for control of mic/line input sensitivity, this control acts as a sensitivity control
covering a 40dB range channel signal level increases as the control is turned
clockwise.
Input sensitivity of mic/line is -20dB ~ +20dB.
Warning :
To protect speakers, do not insert conderser mic or pick up under
phantom power on and you can use trans output balanced dinamic mic under
phantom power on.
※
Warning :
when CLIP LED indicate red color, you can adjust gain volume with
counterclockwise or can use PAD switch.
9. 100Hz (High pass filter) SWITCH
Locating at the rear of head amp, pressing this switch inserts a 12dB per octave
100Hz (high pass filter) in the signal path immediately after the input amplifier, this
is particulary useful on line vocal, and its use is strongly recommanded, even on
male 2 vocals, it can be used for filtering out low frequency hum.
MONO STRIP
1
2
3
4
5
6
7
8
9
GAIN
-30
-50
-60
-20
-40
0
-10
-20
+20
+10
dB
100Hz
-40dB
PAD
1
INSERT
DIRECT
LINE
PHANTOM
POWER
CH 1-4
1
Channel
MIC
1
2
3
