L
AYOUT AND FUNCTION OF INPUT CHANNELS
4
1. MIC INPUT
The channel microphone(1) is a standard 3-pin female(XRL) connector. Pin one is
ground, pin two is signal high(+), pin three is signal low(-), as per the afreed-upon
international standard. When pushing on phantom switch, +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,
usually, signal can be supplied from keyboard, sampler, pre-amp and can be effective
for noise and hum reduction, Input variable range is -20dB ~ +10dB 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. PAD SWITCH
Pushing pad switch for support gain volume, input sensitivity of min/line will be
reduced at 30dB Gain control range is limited with "0" marking.
5. GAIN CONTROL
This is for control of mic/line input sensitivity, this control acts as a sensitivity control
covering a 30dB range.
Channel signal level increase as the control is turned clockwise.
Input sensitivity of mic/line is -50dB ~ -20dB(for PAD -20dB ~ +10dB).
Warning :
To protect speakers, do not insert condenser mic or pull it out phantom
power on and you can use trans output balanced dynamic mic under phantom
power on.
※
Warning :
It is necessary to adjust gain control for headroom and noise reduction.
If it clipped indicator red, you have to adjust gain control to the counter clockwise
or depress PAD switch.
1
MIC
LINE
INSERT
GAIN
–30dB
–15
–40
–20
+10
–50
dB
–20
–45
–30
12KHz
HF
100Hz
15
15
U
15
15
350
MF
3.5K
1K
7K
150
80Hz
LF
U
15
15
AUX
2
U
0
AUX
1
PAN
SGN
CLIP
PFL
1
PAD
LR
U
0
1
U
–10
0
10
+dB
5
U
5
10
20
30
50
OO
dB
U
DSP
21
3
1
2
3
4
5
8
10
12
11
13
9
6
77
MONO STRIP
6. 100Hz 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 particularly useful on line vocal, and its use is strongly recommended, even on
male 2 vocals, it can be used for filtering out low frequency hum.
