Channel One Mk3 – Manual
8
DISCRETE PREAMPLIFIER DE-ESSER
Channel One
VU VU
+12
0
+6
OUT
IN
GR
T
U
B
E
S
A
T
U
R
A
T
I
O
N
O
F
F
%
G
A
I
N
dB | Mic
VA B PAD
A
T
T
A
C
K
dB dB
C
O
M
P
R
E
S
S
I
O
N
-
.
-
.
-
-
-
-
-
-
-
-
S
R
E
D
U
C
T
I
O
N
dB
COMPRESSOR EQUALIZER & AIR BAND
TRANSIENT
DESIGNER
ON
EQ PRE TDDE-ESS OVL
TUBE POST
MUTE
ON ON
S
U
S
T
A
I
N
dB
-
-
-
-
-
-
-
-
-
-
M
A
K
E
-
U
P
G
A
I
N
dB
.
–
+
dB
-
-
-
.
-
-
.
.
.
-
-
-
.
-
-
.
.
.
–
+
dB
M
H
F
Hz
k
k
k
k
k
k
k
k
k
O
U
T
P
U
T
dB
-
-
-
-
-
.
A
I
R
dB
-
-
-
-
-
I
N
S
T
R
U
M
E
N
T
Mk
L
M
F
Hz
INPUT
Mic A
Line/Inst
Mic B
LOW HIGH
-
.
-
-
-
-
-
-
-
-
-
Model
2130
Ø
DISCRETE PREAMPLIFIER DE-ESSER
Channel One
VU VU
+12
0
+6
OUT
IN
GR
T
U
B
E
S
A
T
U
R
A
T
I
O
N
O
F
F
%
G
A
I
N
dB | Mic
VA B PAD
A
T
T
A
C
K
dB dB
C
O
M
P
R
E
S
S
I
O
N
-
.
-
.
-
-
-
-
-
-
-
-
S
R
E
D
U
C
T
I
O
N
dB
COMPRESSOR EQUALIZER & AIR BAND
TRANSIENT
DESIGNER
ON
EQ PRE TDDE-ESS OVL
TUBE POST
MUTE
ON ON
S
U
S
T
A
I
N
dB
-
-
-
-
-
-
-
-
-
-
M
A
K
E
-
U
P
G
A
I
N
dB
.
–
+
dB
-
-
-
.
-
-
.
.
.
-
-
-
.
-
-
.
.
.
–
+
dB
M
H
F
Hz
k
k
k
k
k
k
k
k
k
O
U
T
P
U
T
dB
-
-
-
-
-
.
A
I
R
dB
-
-
-
-
-
I
N
S
T
R
U
M
E
N
T
Mk
L
M
F
Hz
INPUT
Mic A
Line/Inst
Mic B
LOW HIGH
-
.
-
-
-
-
-
-
-
-
-
Model
2130
Ø
LMF
The center frequency of the half-parametric low/mid frequency
lter is set with the LMF control (low/mid frequencies).
The adjustable frequency range is between 30 Hz and
700 Hz so that this lter covers a range of about 4.5 octaves,
allowing it to be used from the deepest bass to the lower mid
range. This together with the MHF lter ensures that the entire
frequency spectrum is covered.
The LMF lter operates to the proportional-Q-principle, in other words the bandwidth is
dependent on the selected boost or cut.
The -/+ control (right to the LMF control) determines the boost
or cut of the LMF lter.
The maximum values are at +/- 12 dB.
DISCRETE PREAMPLIFIER DE-ESSER
Channel One
VU VU
+12
0
+6
OUT
IN
GR
T
U
B
E
S
A
T
U
R
A
T
I
O
N
O
F
F
%
G
A
I
N
dB | Mic
VA B PAD
A
T
T
A
C
K
dB dB
C
O
M
P
R
E
S
S
I
O
N
-
.
-
.
-
-
-
-
-
-
-
-
S
R
E
D
U
C
T
I
O
N
dB
COMPRESSOR EQUALIZER & AIR BAND
TRANSIENT
DESIGNER
ON
EQ PRE TDDE-ESS OVL
TUBE POST
MUTE
ON ON
S
U
S
T
A
I
N
dB
-
-
-
-
-
-
-
-
-
-
M
A
K
E
-
U
P
G
A
I
N
dB
.
–
+
dB
-
-
-
.
-
-
.
.
.
-
-
-
.
-
-
.
.
.
–
+
dB
M
H
F
Hz
k
k
k
k
k
k
k
k
k
O
U
T
P
U
T
dB
-
-
-
-
-
.
A
I
R
dB
-
-
-
-
-
I
N
S
T
R
U
M
E
N
T
Mk
L
M
F
Hz
INPUT
Mic A
Line/Inst
Mic B
LOW HIGH
-
.
-
-
-
-
-
-
-
-
-
Model
2130
Ø
DISCRETE PREAMPLIFIER DE-ESSER
Channel One
VU VU
+12
0
+6
OUT
IN
GR
T
U
B
E
S
A
T
U
R
A
T
I
O
N
O
F
F
%
G
A
I
N
dB | Mic
VA B PAD
A
T
T
A
C
K
dB dB
C
O
M
P
R
E
S
S
I
O
N
-
.
-
.
-
-
-
-
-
-
-
-
S
R
E
D
U
C
T
I
O
N
dB
COMPRESSOR EQUALIZER & AIR BAND
TRANSIENT
DESIGNER
ON
EQ PRE TDDE-ESS OVL
TUBE POST
MUTE
ON ON
S
U
S
T
A
I
N
dB
-
-
-
-
-
-
-
-
-
-
M
A
K
E
-
U
P
G
A
I
N
dB
.
–
+
dB
-
-
-
.
-
-
.
.
.
-
-
-
.
-
-
.
.
.
–
+
dB
M
H
F
Hz
k
k
k
k
k
k
k
k
k
O
U
T
P
U
T
dB
-
-
-
-
-
.
A
I
R
dB
-
-
-
-
-
I
N
S
T
R
U
M
E
N
T
Mk
L
M
F
Hz
INPUT
Mic A
Line/Inst
Mic B
LOW HIGH
-
.
-
-
-
-
-
-
-
-
-
Model
2130
Ø
DISCRETE PREAMPLIFIER DE-ESSER
Channel One
VU VU
+12
0
+6
OUT
IN
GR
T
U
B
E
S
A
T
U
R
A
T
I
O
N
O
F
F
%
G
A
I
N
dB | Mic
VA B PAD
A
T
T
A
C
K
dB dB
C
O
M
P
R
E
S
S
I
O
N
-
.
-
.
-
-
-
-
-
-
-
-
S
R
E
D
U
C
T
I
O
N
dB
COMPRESSOR EQUALIZER & AIR BAND
TRANSIENT
DESIGNER
ON
EQ PRE TDDE-ESS OVL
TUBE POST
MUTE
ON ON
S
U
S
T
A
I
N
dB
-
-
-
-
-
-
-
-
-
-
M
A
K
E
-
U
P
G
A
I
N
dB
.
–
+
dB
-
-
-
.
-
-
.
.
.
-
-
-
.
-
-
.
.
.
–
+
dB
M
H
F
Hz
k
k
k
k
k
k
k
k
k
O
U
T
P
U
T
dB
-
-
-
-
-
.
A
I
R
dB
-
-
-
-
-
I
N
S
T
R
U
M
E
N
T
Mk
L
M
F
Hz
INPUT
Mic A
Line/Inst
Mic B
LOW HIGH
-
.
-
-
-
-
-
-
-
-
-
Model
2130
Ø
Make-Up Gain
The Make-Up Gain control can be used to make up for the
overall level reduction caused by compression.
A value between 0 dB and 20 dB can be set by which the level
is increased again aer compression.
With the help of the Gain Reduction shown on the VU meter,
the adjustment is very simple: if the maximum reduction value
caused by the loudest part is e.g. -9 dB, the Make-Up Gain
control should be set to values around +9 dB.
The On switch activates the compressor section, consisting of
the compression control and the Make-Up Gain.
Compression
The Compression control can be used to set a threshold
between 0 dB and -20 dB. The lower the threshold, the more
the compressor works.
