Peavey X-VCA User Manual
owner’s manual
X-VCA mixing consoles
(PRELIMINARY COPY)
X-VCA owner’s manual
X-VCA block diagram
2
4
4
1
3
5
6
7
(1 OF 8 SHOWN)
X-VCA GROUP OUTPUT
PAN
GROUP
L-R
GROUP
SWITCHES
BUS ASSIGN
MONO
GRP
BAL OUT
OPTION
XFORMER
ON
INSERT
GROUP
GROUP INSERT
MIX AMP
POST
GROUP
GROUP PRE
SEND RTN
MIX
GRP
+10
VCA
GC
∑
GRP
PK
MATRIX
M1M2M3
MUTE
SENDS
GROUP
METER SEND
VCA MASTER
SIG
GROUP PRE
POST
GROUP
BUSES 1-8
GROUP
GROUP
FADER
POST
GROUP
ATTENUATION
M4
MICRO
CONTROL
LATCHES
VCA ASSIGN
12357
METER
TO EXT MTX
BUS IN
AFL MODE
TO GROUP
CV
ON
AUTO
COMP
ON
THRESH
9
121518
ON
THRESH
AUX POST
AUX PRE
& SWITCHING
SOLO CONTROL
SOLO LEFT
MIX BUS
ODD/EVEN PAIRS
TO ADJACENT CHANNEL
LINK
VOX PERC
SOFT
KNEE
21
ON
GATE
SOLO RIGHT
VCA MASTERS
MUTE
STEREO PAIR
AUX ODD/EVEN
AUX
SOLO
SOLO
GROUP
ASSIGN
TO
INPUT
L / R
SOLO
PK
SIG
TO RIBBON
CV
UNITY
(1 OF 8 SHOWN)
EDIT
ASSIGN
THRESH
-45 +15
RATIO
1:1 20:1
COMPRESSOR CONTROL
GAIN
0 DB +20
RATIO
1:5 1:1
-60 -20
THRESH
CONTROL
EXPANDER
PFL
VCA
SLAVE
LATCHES
VCA ASSIGN
MUTE
TO GROUP FADER
GROUP
FACE
CARD
MICRO
INTER-
GROUP
MICRO
CARDS
VCA
SOLO
TIMING CONTROL
RMS
DETECTOR
SAFE
PREVIEW
FROM
FADER
MASTER
PART OF GROUP MICRO INTERFACE CARD
GROUP DYNAMICS SUB-CARD
AUX
1 OF 4
CIRCUITS
CARD
MICRO
MASTER
AUX
BAL OUT
OPTION
XFORMER
AUX POST
TO SOLO
SWITCHING
+10
AUX
MUTE
AUX
LEVEL
TO SOLO
AUX PRE
SWITCHING
AUX
INSERT RTN
AUX
INSERT
MUTE
SEND RTN
GC
SAFE
PREVIEW
MIX AMP
∑
TALK TO AU X
TB
MIX
AUX
FEED
LEFT POST
+10
LEFT
FADER
TO SOLO BUS & MICRO INTERFACE
L / R
EQ ON
LF
FREQ
LEVEL
40 - 800HZ
FREQ
LEVEL
LO MID
Q
60 - 1.2KHZ
3 - 0.7
FREQ
LEVEL
MID
Q
200 - 4 KHZ
3 - 0.7
FREQ
LEVEL
Q
FREQ
LEVEL
X-VCA MASTER MODULE
STEREO 5-BAND SEMI-PARAMETRIC EQ
HI MID
400 - 8 KHZ
3 - 0.7
HF
1K - 20 KHZ
LEFT
INSERT
SEND RTN
L / R
SUM
HPF
ON
HPF
∑GC∑
TALK TO L / R
MIX AMPS
TB
MIX
LEFT
FEED
L / R
RIGHT
PRE-FADER
RIGHT
MIX
L / R
HPF
+10
PRE-FADER
RIGHT SIDE FOLLOWS LEFT
GC
RIGHT POST
RIGHT
FADER
L / R TO
HI-PASS FILTERS
40HZ@24DB/OCT
MONO
MONO
FREQ
LEVEL
FREQ
LEVEL
FREQ
LEVEL
FREQ
LEVEL
FREQ
LEVEL
LEFT POST
SOLO
TO SOLO BUS & MICRO INTERFACE
Q
3 - 0.7
Q
3 - 0.7
Q
3 - 0.7
RIGHT POST
TALK TO MONO
TB
FEED
MONO POST
+10
MONO
EQ ON
LF
LO MID
MID
HI MID
HF
MONO
INSERT
SEND RTN
GC
HPF
HI-PASS FILTER
40HZ@24DB/OCT
∑
MIX
MONO
MONO
40 - 800HZ
60 - 1.2KHZ
200 - 4 KHZ
5-BAND SEMI-PARAMETRIC EQ
400 - 8 KHZ
1K - 20 KHZ
HPF
MIX AMP
PK
ON
FADER
MONO
POST
MONO
SIG
PRE-FADER
M1M2M3
MAIN OUTPUT LIMITERS
BALANCED INPUTS TO FEED
MONO TO MATRIX SENDS SHOWN.
LEFT AND RIGHT BOTH HAVE
IDENTICAL SETS OF MATRIX SENDS
AND SWITCHES
MONO
SENDS
MATRIX
M4
TO EXT MTX
L / R
LIMITER ON
METER
136
9
OUTPUT
121824
ON
ATTENUATION
LEVEL
OUTPUT
-6 DBU +20
123
INTERNAL MATRIX 1-4
EXT INPUT 1 ALSO FEEDS
MATRIX EXPANSION CONNECTOR
TO ALL
EXT IN 1
M1M2M3
TO EXT MTX
LEFT
BAL OUT
LIMITER
L / R STEREO
4
M4
VCA
EXT MATRIX IN
XFORMER
LEFT
POST
EXT MATRIX IN
MATRIX SENDS
RIGHT
OPTION
VCA
PK
L / R
20 : 1
RATIO
POST
RIGHT
PROGRAM IN
EXTERNAL STEREO
HFLF
LEVEL
STR PGM
SIG
L / R
SENDS
METER
OUTPUT
ATTENUATION
L
R
SHELVING EQ
STEREO 2-BAND
MONO
METER
ON
OUTPUT
EXT STR PGM
TO SOLO BUS
SEND
MONO
METER
MONO
LIMITER ON
136
9
121824
LEVEL
-6 DBU +20
SOLO
ASSIGN
EXT STR PGM
MATRIX CIRCUITRY 1 OF 4 SHOWN
MONO
MATRIX
MATRIX
MATRIX
MIX AMP
BAL OUT
MONO
MATRIX
LEVEL
BAL OUT
MATRIX
LIMITER
POST
MUTE
PRE
MIX
MATRIX
VCA
+10
∑
OPTION
XFORMER
20 : 1
RATIO
POST
MONO
SAFE
PRVW
(MICRO CONTROLLED)
MUTE AND SOLO SWITCHING
TO SOLO BUS & MICRO INTERFACE
SOLO MUTE
MATRIX
TALK TO
TB
FEED
CABLE
INTER-
RIBBON
CONNECT
VCA
SOLO
ASSIGN
AFL MODE
SOLO LEFT
SOLO RIGHT
& SWITCHING
SOLO CONTROL
PRE-FADER
L - R
POST-PAN
VCA SUB-CARD
VCA
FREQ
LEVEL
Q
FREQ
LEVEL
Q
FREQ
LEVEL
Q
(24 TO 48 FITTED)
FREQ
LEVEL
X-VCA MONO INPUT
Q
HPF
GAIN
PAD
26dB
+48V
BALANCED
TO
NEXT
MODULE
INPUT CHAN
BUSES 1-8
VCA MASTER
CHANNEL
3 - 0.7 3 - 0.7
3 - 0.7
3 - 0.7
20 - 400HZ
15 - 70 DB
Ø
LINE
P
SW
LINE
IN
FACE
INTER-
HOLD FOR
MOMENTARY
LOGIC
SWITCH
TALKBACK
M
L R
AUDIO
-
CARD
ANU
HP
LEVEL
POST MON
L R
PRE MON
L R
POST MON
MONITOR FEEDS
INPUT &
312
L
A
SOURCE
+48V
SOURCE
SOURCE
TO OUTPUTS
MATRIX EXPANSION CONNECTOR ALLOWS
ADDITIONAL MATRIX MIXES TO BE CREATED
GROUP
TALK BACK
TB
CONTROL
U
M
+48 VOLT
LEVEL
EXTERNALLY USING X-MATRIX BOXES OR
-
TO
SIDE
INPUT
RIGHT
MICRO
CARDS
645
7
T
E
SCENE
S
AND UNDER ARMREST
JACKS LOCATED ON MASTER MODULE
OFF / ON
PINK
NOISE
PINK
LCR TO
OUTPUTS
OTHER LINE-LEVEL MIXERS.
FUNCTIONS WITH X-VCA CONSOLE.
X-MATRIX BOXES LINK SOLO AND TALKBACK
8
MICRO MUTE CONTROL
OUT
HEADPHONE
IN
TALK BACK
GEN
NOISE
PRE FADER
LEFT RIGHT
POST FADER
LEFT RIGHT
SIGNAL SOURCES
FROM L / R / MONO
MONO
POST PRE
X-VCA Block Diagram
X-VCA BLK DIA-REV1.1 9/8/00
-
TO
SIDE
POST
FADER
SOLO
FROM -
CTRL
TALK TO
MONITOR
SOURCE
L R
PRE MON
TALK TO
ALT OUT
GROUPS
L / R / MONO
EXT MATRIX IN 1
TALKBACK
L R
TALKBACK
128
OFF
SOLO
AUDIO
SOURCE
POST MON
AUDIO
SEQUENCED
SCENE
PRE FDR
LEFT
MICRO
CARDS
GROUP
MICRO
MASTER
EDIT
GO
SAFE
MICRO
UTILITY
EDIT
SCENE
SINGLE
PREVIEW
SCENE ON
SEQUENCE
SOLO
AUDIO
LEFT - RIGHT
SOURCE
L R
PRE MON
-
LATCH
TAP TO
TALK ON
TB
TB
TB AUDIO
(TO RIBBON)
L R
SOURCE
PRE MON
L R
SOURCE
POST MON
SOLO AUDIO
AND CONTROL
PREV
FROM
MODULE
AND
1 OF 4
VCA,
CTRL
SOLO
MUTE
CIRCUITS
MUTE
CARD
MICRO
INTERFACE
SAFE
PREVIEW
LATCHES
VCA ASSIGN
FADER
EQ
ON
LF
SH
40 - 800 HZ
LOW MIDHI MIDHF
400 - 8 KHZ 100 - 2 KHZ
SH
1K - 20 KHZ
HPF
SW
LINE
OPTION
XFORMER
CV
FOUR-BAND FULLY PARAMETRIC EQ
INPUT
PREAMP
PRE
INPUT METER
MUTE ?
SOURCE
PEAK+80-6SIG
GC
INSERT SEND
1 THRU 4
AUX SENDS
1-2
PRE
YES
NO
ON
INSERT
1 - LEV
EQ FDR
PRE
AUX 1
2 - PAN
PRE
SOURCE
FADER
AUX 2
1-2 LEV/PAN CTRL
3-4
PRE
AMP
PRE-SOURCE
SELECT
PRE-EQ
POST
BAL INSERT RTN
3- LEV
FADER
DIRECT OUT
AUX 3
PRE-FADER
AUX 4
4 - PAN
POST-FADER
DIRECT OUT
GC
3-4 LEV/PAN CTRL
SOURCE
5- LEV
5-8
PRE
AUX 5
6 - PAN
GAIN
GC
P
AUX 6
5-6 LEV/PAN CTRL
7- LEV
OBE
FRANK
XLR
JACK
JACK
1/4” TRS
ELECT
SWITCH
FET
SWITCH
SHUNT
REMOVABLE
USER
OPTION
PANEL
SWITCH
AMP
DRIVER
BALANCED
DRIVER
GROUND COMP
LED
BICOLOR
FADER
100MM
POT PAD LED
ROTARY
AUX 8
AUX 7
7-8 LEV/PAN CTRL
BUS ASSIGN
MONOL-R1357
8 - PAN
L- AFL -R
TO SOLO
SWITCHING
PAN
LEGENDS
STANDARD OUTPUT LEVEL IS +4 dBu AT 0 VU
PIN 2 HOT ON ALL BALANCED OUTPUTS (XLR JACKS)
FOR UNBALANCED OPERATION:
TIE PIN 3 TO PIN 1, USE PIN 2 FOR OUTPUT, PIN 1 FOR GND
“Ø” SYMBOL INDICATES POLARITY REVERSE
ALL SWITCHES SHOWN IN THE UP (DESELECTED) POSITION
AMP(LIFIER) GAIN SHOWN IN DB WHEN NEEDED
WHEN SHOWN: 1/4” TRS SWITCHING JACKS HAVE NORMALLY CLOSED CONTACTS
USER OPTIONS IMPLEMENTED WITH REMOVABLE SHUNTS
DEFAULT SHUNT POSITION SHOWN UNDERLINED
SWITCHES
& CONTROL
1 2 3 4 5 6 7 8 LEFT RIGHT MONO SOLO L SOLO R
2468
LCR PAN
X-VCA STEREO INPUT
(4 NORMALLY FITTED)
STEREO INPUTS HAVE SAME FEATURES AS
MONO INPUT EXCEPT AS NOTED BELOW:
LAMP DIM
( ON REAR )
STANDARD IEC
METERBRIDGE - 13 MECHANICAL VU METERS WITH LED ILLUMINATION
8 METERS FOR GROUP OUT , 3 FOR MAIN OUTS, 2 FOR SOLO LEFT & RIGHT
FOR COOLING
LOW-NOISE FAN
ISOLATING CONSOLE
REMOVABLE LINK FOR
LINKING BACK-UP SUPPLY
DUAL DC CONNECTORS FOR
- SWITCHABLE BETWEEN XLR OR TRS / RCA
- L & R SOURCE SELECT SWITCHES
• DUAL SETS OF LINE INPUTS (NO MIC LEVEL)-
• 4-BAND SEMI-PARAMETRIC EQ (NO Q CONTROL)
• DUAL-LED SIGNAL PRESENT / PEAK INDICATORS
• NO LCR ASSIGNMENT
• NO INSERT SEND / RETURN JACKS
• NO DIRECT-OUT JACK
IN • MIDI • OUT
( ON REAR PANEL )
X-VCA MASTER MODULE (LOWER AREA)
12V LAMP SOCKETS - 2 OR 4
( ON REAR OF METER BRIDGE )
+/- 18V, +12V, +48V
DC INPUT ( ON REAR )
50/60 HZ
90-250VAC
POWER INLET
GROUND
MODEL 5A
CREST X-SERIES POWER SUPPLY ( REAR VIEW )
SOLO LEFT
SOLO RIGHT
∑
∑
MIX
SOLO
AMPS
L SOLO R
TO METER BRIDGE
SOLO
AUDIO
MONITOR OUT
LEFT RIGHT
M3 M4
ASSISTED OUT
M2M1
LEFT RIGHT
ALTERNATE OUT
37-WAY FEMALE D-SUB
(ON REAR OF MASTER MODULE)
MATRIX EXPANSION CONNECTOR
LAST
SOLO
ACTIVE
CLEAR
PRESSED
SOLO CONTROL & STATUS
LEVEL
MONITOR
SUM
MONO
LEVEL
ALT OUT
SUM
MONO
POWER FEED TO
X-MATRIX BOXES
AUDIO FEEDS
1
2
3
4
5
group module p. 43
VCA groups, audio groups, dynamics, matrix and
Aux masters
left, right & mono p. 59
masters
master control section p. 71
6
microprocessor control p.89
9
stereo input module p. 27
Line inputs and stereo returns
mono input module p. 7
Mic and line inputs
table of contents
7
8
solo/vca edit switch p. 129
0
dynamics control p. 131
vca facilities p. 107
power supply p. 139
how to use this manual
format
This manual uses a format that is intended to be easy to read, yet technical for those
who need to know all the details. For feature descriptions, this is done by devoting the
left side of each page to 1) an overall module picture, 2) a block diagram, and 3) a control closeup.These images all per tain to the features and control descriptions on the
right side of the page. Also, for cer tain features like the micro processor system and the
solo system that appear over and over again, references are made to sections devoted
to these features.
The intention is to make the manual easy to read while including all the technical details
needed for getting the most out of the X-VCA console, a flexible and feature-rich addition to Crest Audio's growing line of audio mixing console products.
conventions
Control Icons
This manual uses little pictures, or icons to illustrate what the control descriptions are
referring to.This makes it possible to avoid redundant wording and makes the control
descriptions clear.
Switch in the UP, non-activated position
Switch in DOWN, activated position
Switch that illuminates when in the DOWN position
Momentary switch that illuminates when activated
LED that is on, indicating that it's associated feature is activated
Potentiometer
Standard 1/4" TRS jack (used for line level inputs and insert sends)
1/4" TRS jack with normal switching (used on inser t returns)
Female XLR input jack
Male XLR output jack
LED
p. 6
X-VCA owner’s manual
mono input module
module
panel
GAIN
+
48V
PAD
LINE
Ø
30
12
20
40
50
72
block diagram
A
7
M
4
1
+
48V
PAD
LINE
Ø
GAIN
30
40
20
50
12
72
AUX
10
–
1
0
20
+
3
30
40
6
•
10
–
2
0
20
+
3
30
40
6
•
PRE
10
–
3
0
20
+
3
30
40
6
•
10
–
4
0
20
+
3
30
40
6
•
PRE
5
6
-
–
12
6
0
+
20
3
40
6
•
7
6
-
–
12
8
0
+
20
3
40
6
•
PRE
1.5
HF
Q
.7
3
SHELF
6K
3K
12K
1.5
18K
20K
1K
1.5
HM
Q
.73
2K
4K
1K
6K
8K400
1.5
LM
Q
.73
500
1K
200
1.5
2K100
1.5
LF
Q
.7
3
SHELF
200
400
100
600
80040
– +
EQ
ON
FREQ
80
200
40
20 400
HPF
INSERT
ON
C
PAN
ODD - LR - EVEN
SAFE
PREVIEW
MUTE
PK
+
8
0
–
6
10
SIG
LCR
5
M
0
L-R
PAN ON
5
GROUPS
1
10
2
3
15
4
20
5
30
6
40
7
50
8
SOLO
VCA
ASSIGN
(24 TO
X-VCA
+48V
HHF
3 - 0.
FREQ
LEVEL
QQ
3 - 0.7
HPF
400
SH
1K - 20 KHZ
HPF
20 - 400HZ
GAIN
15 - 70 DB
Ø
SW
LINE
OPTION
XFORMER
PAD
26dB
LINE
P
SW
LINE
IN
BALANCED
FOUR-B
INPUT
PREAMP
p. 7
mono input module
features
phantom power +48V
48 volts DC is applied to pins 2 and 3 on the mic-input XLR connector. This
option is used with condenser microphones and active direct boxes that require
an external DC voltage (phantom power) in order to operate.
pad
The mic-input signal is attenuated by 20dB to prevent some signals (e.g. kick
drum or lead vocal) from overloading the preamp stage.The pad is used to bring
a hot mic-input signal down to a controllable level.The 20dB pad is not functional
when the
LINE
switch is depressed.
line
The input preamp circuit is set up to accept a mic-level signal. This signal is
brought in via the XLR mic-input connector located on the rear panel.The 1/4"
TRS input jack is disabled.
The input preamp circuit is set up to accept a line-level signal from either
the XLR mic-input connector or the 1/4" TRS input jack, both located on the rear
panel.When a plug is inserted into the 1/4" TRS input jack, the XLR mic-input
connector is disabled.
polarity reverse—ø
This feature is used for correcting or minimizing polarity and phase related errors.
For example, occasionally a balanced input connection is reverse-wired before it
gets to the mixing console.This can happen in microphones, or in snake line interfaces. By using the polarity reverse feature, this type of error can be corrected.
polarity inverted
polarity not inverted
If the 48V phantom
power switch is
engaged, depressing this
switch disconnects phantom
power from the mic input
XLR.
+
1
When similar signals
from different channels are combined, phase
cancellations can occur.
Reversing the polarity of an
input signal often corrects
such phasing errors.
+
The 48V switch should
not be engaged when
using standard (dynamic)
microphones, or other
sources that do not use
phantom power.
a
p. 8
X-VCA owner’s manual
mono input module
1
module
panel
GAIN
+
48V
PAD
LINE
Ø
30
12
20
40
50
72
block diagram
A
7
M
4
+
30
20
12
AUX
10
20
30
40
•
10
20
30
40
•
PRE
10
20
30
40
•
10
20
30
40
•
PRE
12
20
40
•
12
20
40
•
1.5
HF
3
6K
3K
1.5
1K
1.5
HM
2K
1K
1.5
LM
500
200
1.5
LF
3
200
100
80
40
20 400
C
ODD - LR - EVEN
SAFE
PREVIEW
PK
+
8
0
–
6
SIG
LCR
M
L-R
PAN ON
GROUPS
1
2
3
4
5
6
7
8
48V
PAD
LINE
Ø
72
–
6
–
6
–
6
–
6
6
6
PRE
SHELF
.73
.73
SHELF
EQ
ON
HPF
INSERT
MUTE
HHF
3 - 0.
400
FOUR-B
GAIN
40
50
1
0
+
3
2
0
+
3
3
0
+
3
4
0
+
3
5
-
–
6
0
+
3
6
7
-
–
8
0
+
3
6
Q
.7
12K
18K
20K
Q
4K
6K
8K400
Q
1K
1.5
2K100
Q
.7
400
600
80040
– +
FREQ
200
ON
PAN
10
5
0
5
10
15
20
30
40
50
(24 TO
X-VCA
+48V
FREQ
LEVEL
QQ
3 - 0.7
HPF
SH
1K - 20 KHZ
HPF
20 - 400HZ
GAIN
15 - 70 DB
Ø
LINE
OPTION
XFORMER
PAD
26dB
LINE
P
SW
LINE
IN
BALANCED
SW
INPUT
PREAMP
SOLO
ASSIGN
VCA
p. 9
mono input module
features
gain
The Input gain control range is closely related to the status of the
PAD
switch and
the
LINE switch. In order to establish proper gain structure in the console, input
gain settings must be set correctly.
LINE—switch-up
PAD—switch-up
15 to 75dB of gain can be added the mic-input signal.
The impedance at the input XLR is 4kΩ.
LINE—switch-up PAD—switch-down
-5 to 55dB of gain can be added to the mic-input signal.
The impedance at the input XLR is 4kΩ.
LINE—switch-down PAD—switch-up or -down
-10 to 45dB of gain can be added the line-input signal.
The impedance at the input XLR and input 1/4" TRS is 20kΩ.
1
If the channel peak
LED is illuminated,
first try lowering
the input gain control.
Only when this method is
unsuccessful should the pad
switch be engaged.
+
1
p. 10
X-VCA owner’s manual
mono input module
module
panel
PRE
PRE
AUX
PRE
5
-
6
3
4
7
-
8
1
2
40
12
6
0
6
•
3
20
+
–
40
12
6
0
6
•
3
20
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
block diagram
SAFE
LEGENDS
C
T
A
A
O
C
20
AUX
30
30
30
30
20
40
20
40
HF
3K
1.5
HM
1K
LM
200
LF
100
40
ODD - LR - EVEN
LCR
M
L-R
PAN ON
GROUPS
1
2
3
4
5
6
7
8
30
12
20
40
•
20
40
•
20
40
•
20
40
•
12
•
12
•
3
1K
500
3
200
80
20 400
SIG
10
10
10
10
2K
PREVIEW
PK
+
–
1.5
6K
1.5
1.5
1.5
8
0
6
+
48V
PAD
LINE
Ø
PRE
PRE
6
6
PRE
SHELF
SHELF
EQ
ON
HPF
INSERT
C
SAFE
72
–
–
–
–
.73
.73
MUTE
6
6
6
6
ON
SOLO
ASSIGN
F
C
MI
IN
GR
TO
INPUT
1-2 LEV/PAN CTRL
3- LEV
PRE
AMP
MICRO
AUX 3
4 - PAN
PRE-FADER
CARDS
AUX 4
3-4 LEV/PAN CTRL
POST-FADER
AUX 6
AUX 5
5- LEV
6 - PAN
5-8
PRE
AFL MODE
SOLO LEFT
MODULE
CIRCUITS
1 THRU 4
1 - LEV
1-2
PRE
YES
NO
EQ FDR
SOLO RIGHT
AUX 2
AUX 1
2 - PAN
3-4
PRE-SOURCE
PRE
SELECT
SOURCE
GAIN
40
50
1
0
+
3
2
0
+
3
3
0
+
3
4
0
+
3
5
-
–
6
0
+
3
6
7
-
–
8
0
+
3
6
Q
.7
12K
18K
20K
Q
4K
6K
8K400
Q
1K
1.5
2K100
Q
.7
400
600
80040
– +
FREQ
200
PAN
10
5
0
5
10
15
20
30
40
50
PREV
FROM
1 OF 4
PREVIEW
AUX SENDS
MUTE ?
FROM
5-6 LEV/PAN CTRL
7- LEV
OBE
XLR
1/4” TRS
1
CIR
CARD
MICRO
MASTER
AUX 7
8 - PAN
FRANK
JACK
JACK
AUX 8
7-8 LEV/PAN CTRL
TO SOLO
PRE-EQ
ELECT
VCA
SOURCE
DIRECT OUT
SWITCH
AT 0 VU
CH
TPUT, PIN 1 FOR GND
TS (XLR JACKS)
p. 11
mono input module
1
aux send features
Eight auxiliary sends are available for creating individual output mixes. These can
be used to drive effects processors, provide monitor mixes, create broadcast or
alternate sound reinforcement mixes, or for other special requirements. Each pair
of odd/even Aux buses (1&2, 3&4, etc.) can be treated as individual discrete mono
sends, or as stereo pairs. Discrete mono or stereo pair mods are selected globally for each aux pair via mode switched in the Aux master section, located at the
top of the Group modules.
Aux sends 1-2,3-4
These knobs adjust the amount of signal sent to the first four AUX buses.
Unity gain occurs at the he zero setting.
In mono mode, each control independently determines the send level for the
respective aux mix. When stereo mode is selected, the top (odd numbered) control sets signal level while the bottom (even numbered) control pans the signal
between odd and even auxiliary mix buses (odd = left, even = right).
Aux PRE switches 1-2, 3-4,
The Aux PRE switches determine the source for each pair of AUX sends.The signal that these switches use for the PRE setting can be further defined by changing
the position of a couple of internal jumpers. See INTERNAL JUMPER
OPTIONS.
AUX SENDS are post-insert, post-eq, post-mute, post-fader
AUX SENDS are post-insert, post-eq, post-mute, pre-fader
Aux sends 5-6,7-8 (Dual Concentric)
In mono mode, the inner knobs control levels for aux 5 and 7, respectively.
The outer knobs control levels for aux 6 and 8, respectively. When stereo mode
is selected for either of the odd/even aux pairs, the center knobs become the
level controls and the outer knobs become the pan controls.
Aux 5-6 & 7-8 PRE switch
See "Aux PRE switches 1-2, 3-4" above.This button functions the same
way, however it selects the signal source for Aux's 5,6, 7 & 8.
It's typical to
make Aux sends
Post fader when driving
effects, and Pre fader when
mixing for monitors.
+
1
p. 12
X-VCA owner’s manual
mono input module
module
panel
EQ
ON
FREQ
1.5
1.5
SHELF
SHELF
LF
LM
HM
HF
– +
.7
3
Q
3K
6K
12K
20K
1K
18K
1.5
1K
2K
4K
8K400
6K
1.5
.73
Q
1K
2K100
1.5
200
500
400
80040
600
10 0
200
1.5
.73
Q
.7
3
Q
block diagram
C
30
20
AUX
20
30
40
20
30
40
20
30
40
20
30
40
12
20
40
12
20
40
HF
3K
1.5
1K
HM
1K
LM
500
200
LF
200
100
80
40
20 400
ODD - LR - EVEN
12
•
•
•
•
•
•
3
3
10
10
10
10
1.5
6K
1.5
2K
1.5
1.5
PREVIEW
+
48V
PAD
LINE
Ø
PRE
PRE
6
6
PRE
SHELF
SHELF
EQ
ON
HPF
INSERT
C
SAFE
72
–
–
–
–
.73
.73
MUTE
YES
GAIN
40
50
1
0
+
3
6
2
0
+
3
6
3
0
+
3
6
4
0
+
3
6
5
-
–
6
0
+
3
6
7
-
–
8
0
+
3
6
Q
.7
12K
18K
20K
Q
4K
6K
8K400
Q
1K
1.5
2K100
Q
.7
400
600
80040
– +
FREQ
200
VCA SUB-
VCA
FREQ
LEVEL
Q
FREQ
LEVEL
Q
FREQ
LEVEL
Q
3 - 0.7 3 - 0.7
3 - 0.7
EQ
ON
SH
LF
40 - 800 HZ
LOW MIDHI MIDHF
400 - 8 KHZ 100 - 2 KHZ
PRE
MUTE ?
SOURCE
PEAK+80-6SIG
INPUT METER
NO
FOUR-BAND FULLY PARAMETRIC EQ
FREQ
ON
PAN
LEVEL
Q
3 - 0.7
SH
1K - 20 KHZ
PK
+
8
0
–
6
LCR
M
L-R
PAN ON
GROUPS
1
2
3
4
5
6
7
8
SIG
SOLO
ASSIGN
10
5
0
5
10
15
20
30
40
50
VCA
HPF
20 - 400HZ
70 DB
AIN
HPF
AMP
PUT
ON
INSERT
p. 13
mono input module
1
EQ features
Many audio signals coming into the console require some degree of corrective eq
in order to be part of a good sounding mix.The X-VCA offers an uncompromised, full parametric EQ on each channel.
The input EQ consists of four full parametric bands: high, high-mid, low-mid, and
low. The high and low bands are independently switchable for either adjustable
bandwidth or shelving mode. All bands offer a generous overlap of adjacent operating frequencies. An independent, variable high pass filter provides additional
problem-solving flexibility.
high frequency—HF
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.
Turning the control full clockwise switches operation to a plus/minus shelving
mode.
Boost / Cut (inner knob)15dB boost and cut.
Frequency (outer knob) Continuously sweepable between 1kHz and
20kHz
high mid—HM
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.
Boost / Cut (inner knob)15dB boost and cut.
Frequency (outer knob) Continuously sweepable between 400 Hz and 8
kHz.
Low mid—LM
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.
Boost / Cut (inner knob)15dB boost and cut.
Frequency (outer knob) Continuously sweepable between 100 Hz and 2
kHz.
Low frequency—LF
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.
Turning the control full clockwise switches operation to a plus/minus shelving
mode.
Boost / Cut (inner knob)15dB boost and cut.
Frequency (outer knob) Continuously sweepable between 40 Hz and 800
kHz.
eq on
Equalizer is on. This switch is used to activate the EQ section and can be
used to make A/B comparisons between "flat" and eq'd signals.
When boosting or cutting EQ, it is often
necessary to compensate
for cumulative level
changes. This is best done
with the Input Gain control
+
1
p. 14
X-VCA owner’s manual
mono input module
module
panel
20 400
40
80
200
EQ
ON
FREQ
SHELF
HPF
PAN
INSERT
ON
C
– +
400
80040
600
10 0
200
.7
3
block diagram
E
(24
TO
48
FITTED)
+
48V
PAD
LINE
Ø
GAIN
30
40
20
50
12
72
AUX
10
–
1
0
20
+
3
30
40
6
•
10
–
2
0
20
+
3
30
40
6
•
PRE
10
–
3
0
20
+
3
30
40
6
•
10
–
4
0
20
+
3
30
40
6
•
PRE
5
6
-
–
12
6
0
+
20
3
40
6
•
7
6
-
–
12
8
0
+
20
3
40
6
•
PRE
1.5
HF
Q
.7
3
SHELF
6K
3K
12K
1.5
18K
20K
1K
1.5
HM
Q
.73
2K
4K
1K
6K
8K400
1.5
LM
Q
.73
500
1K
200
1.5
2K100
1.5
LF
Q
.7
3
SHELF
200
400
100
600
80040
– +
EQ
ON
FREQ
80
200
40
20 400
HPF
INSERT
ON
C
PAN
ODD - LR - EVEN
SAFE
PREVIEW
MUTE
PK
+
8
0
–
6
10
SIG
LCR
5
M
0
L-R
PAN ON
5
GROUPS
1
10
2
3
15
4
20
5
30
6
40
7
50
8
SOLO
VCA
ASSIGN
+48V
FREQ
LEVEL
FREQ
LEVEL
FREQ
LEVEL
PAD
26dB
Q
3 - 0.7
Q
3 - 0.7
Q
3 - 0.7
HPF
20 - 400HZ
GAIN
15 - 70 DB
Ø
LINE
P
SW
LINE
LOW MIDHI MIDHF
400 - 8 KHZ 100 - 2 KHZ
SH
1K - 20 KHZ
LINE
OPTION
XFORMER
FOUR-BAND FULLY PARAMETRIC
HPF
INPUT
SW
P
+80-6SIG
INPUT METER
INSERT
PREAMP
GC
p. 15
1
high-pass filter—HPF
Proper use of the high-pass filter reduces or eliminates unwanted low frequencies
without substantially affecting the program material. Quite often such unwanted
low frequencies are included with in-coming mic- or line-input signals. For example, stage rumble or wind can be picked up through vocal mics.The slope of the
high-pass filter is 12dB per octave.
HPF
High-pass filter is on.
HPF—variable control
When the high-pass filter is on, this control selects a frequency between
20Hz and 400Hz as the point where attenuation begins.
mono input module
Many microphones
have a built-in switchable high-pass filter.
+
1
p. 16
X-VCA owner’s manual
mono input module
module
panel
20 400
40
80
200
EQ
ON
FREQ
HPF
ODD - LR - EVEN
PAN
INSERT
ON
SAFE
PREVIEW
C
– +
80040
600
block diagram
Y
U
20
AUX
30
30
30
30
20
40
20
40
HF
3K
1.5
HM
1K
LM
200
LF
100
40
ODD - LR - EVEN
LCR
M
L-R
PAN ON
GROUPS
1
2
3
4
5
6
7
8
30
12
10
20
40
•
10
20
40
•
10
20
40
•
10
20
40
•
12
•
12
•
3
1K
2K
500
3
200
80
20 400
PREVIEW
PK
+
–
SIG
+
48V
PAD
LINE
Ø
GAIN
40
50
72
–
0
+
3
6
–
0
+
3
6
PRE
–
0
+
3
6
–
0
+
3
6
PRE
6
–
6
6
–
6
PRE
1.5
.7
SHELF
6K
12K
20K
1.5
.73
4K
8K400
1.5
.73
1K
2K100
1.5
.7
SHELF
400
80040
EQ
ON
200
HPF
INSERT
ON
C
SAFE
MUTE
8
0
6
INP
-6SIG
HI MIDHF
400 - 8 KHZ1K - 20 KHZ
1
2
3
4
5
-
6
0
+
3
7
-
8
0
+
3
Q
18K
Q
SH
FOUR-BAND FULL
PRE
FADER
POST
FADER
ON
INSERT
HPF
6K
Q
1.5
Q
600
– +
FREQ
LINE
PAN
10
5
0
5
10
15
20
30
40
50
OPTION
XFORMER
SW
INPUT
PREAMP
GC
GC
SOLO
ASSIGN
VCA
INSERT SEND
BAL INSERT RTN
DIRECT OUT
p. 17
mono input module
1
Insert features
Insert ON switch
The Insert point is located after the EQ and before the Low Pass Filter.
External signal processors can be inserted into the channel via 1/4" TRS
connectors (send and return) on the rear panel.The SEND signal is unbalanced and the RETURN can accept both unbalanced and balanced signals.
Insert is switched OUT. Any signal coming into the Insert RETURN
jack is left unused.The Insert SEND jack can be used to derive a post-EQ,
pre-LPF output from the channel without interrupting the channel's normal
signal flow.
Insert is switched IN.The Insert RETURN jack is activated.The
RETURN jack can also be used as an input for situations where the mic
preamp and it's associated features are not required, such as when using an
external mic preamp.
pan control
See description of Bus Assignment features later in this section
safe preview
Safe Preview LED
See LOCAL MICROPROCESSOR CONTROL section
mute
Mute switch
See LOCAL MICROPROCESSOR CONTROL section
write-in label
This label may be written on with a grease-marker, or dry-erase pen and later
wiped clean. Masking tape may also be placed on this surface, if desired. If you
write on it with a "Sharpie", you may have trouble getting the writing off. If this is
the case, your best bet is to wipe the label off with isopropyl (rubbing) alcohol.
If you are using a
something like an
external tube mic preamp,
you can bypass the channel's input preamp by coming into the insert return
jack.
+
LED
1
p. 18
X-VCA owner’s manual
mono input module
module
panel
LCR
1
2
3
4
5
6
7
8
M
L-R
PAN ON
GROUPS
PK
–
6
0
SIG
+
8
5
10
0
5
10
20
30
15
50
40
SOLO
VCA
ASSIGN
block diagram
C
+
48V
PAD
LINE
Ø
GAIN
30
40
20
50
12
72
AUX
10
–
1
0
20
+
3
30
40
6
•
10
–
2
0
20
+
3
30
40
6
•
PRE
10
–
3
0
20
+
3
30
40
6
•
10
–
4
0
20
+
3
30
40
6
•
PRE
5
6
-
–
12
6
0
+
20
3
40
6
•
7
6
-
–
12
8
0
+
20
3
40
6
•
PRE
1.5
HF
Q
.7
3
SHELF
6K
3K
12K
1.5
18K
20K
1K
1.5
HM
Q
.73
2K
4K
1K
6K
8K400
1.5
LM
Q
.73
500
1K
200
1.5
2K100
1.5
LF
Q
.7
3
SHELF
200
400
100
600
80040
– +
EQ
ON
FREQ
80
200
40
20 400
HPF
INSERT
ON
C
PAN
ODD - LR - EVEN
SAFE
PREVIEW
MUTE
PK
+
8
0
–
6
10
SIG
LCR
5
M
0
L-R
PAN ON
5
GROUPS
1
10
2
3
15
4
20
5
30
6
40
7
50
8
SOLO
VCA
ASSIGN
400 - 8 KHZ 100 - 2 KHZ1K - 20 KHZ 40 - 800 HZ
FOUR-BAND FULLY PARAMETRIC EQ
HPF
T
MP
PRE
MUTE ?
SOURCE
PEAK+80-6SIG
INPUT METER
YES
NO
INSERT
ON
EQ FDR
PRE
PRE
FADER
AMP
PRE-SOUR
SELECT
SOURCE
PRE-EQ
POST
PRE-FADER
POST-FADER
SOURCE
DIRECT OUT
FADER
p. 19
mono input module
level meter features
level meter
Each input includes a five-segment LED meter for visually monitoring signal levels.This is essential for setting up and maintaining proper
gain structure.
peak indicator—PK
The input signal is monitored at several points throughout the channel.
These points are the mic preamp, the EQ stage and the fader stage. Overloads at
any of these stages will cause the red peak-LED to light.
Then the channel gain should reduced.
signal level LED’s
These three LED's light up at +8—yellow, 0—green, and -6 dB—green.This
level range -6 to +8 is the optimum operating range. Compressed or relatively
constant signals should remain close to 0.
signal present indicator—SIG
This green-LED varies in brightness in response to signal levels between -40
dB and -6 dB.
Occasional flashing of the
peak LED is acceptable,
but frequent flashes indicate that channel levels
must be lowered.
®
1
LEDLEDLEDLEDLED
LED
LED
LED
1
p. 20
X-VCA owner’s manual
mono input module
module
panel
ODD - LR - EVEN
PAN
MUTE
SAFE
PREVIEW
C
LCR
1
2
3
4
5
6
7
8
M
L-R
PAN ON
GROUPS
PK
–
6
0
SIG
+
8
5
10
0
5
10
20
30
15
50
40
SOLO
VCA
ASSIGN
block diagram
8
PAN
20
AUX
20
30
20
30
20
30
20
30
12
20
40
12
20
40
HF
3K
1.5
HM
1K
LM
200
LF
100
40
ODD - LR - EVEN
LCR
M
L-R
PAN ON
GROUPS
1
2
3
4
5
6
7
8
+
48V
PAD
LINE
Ø
30
12
72
10
–
40
•
10
–
40
•
PRE
10
–
40
•
10
–
40
•
PRE
6
•
6
•
PRE
1.5
3
SHELF
6K
1K
1.5
.73
2K
1.5
.73
500
1.5
3
SHELF
200
EQ
ON
80
20 400
HPF
INSERT
C
SAFE
PREVIEW
MUTE
PK
+
8
0
–
6
SIG
6
6
6
6
ON
SOLO
ASSIGN
GAIN
40
50
1
0
+
3
2
0
+
3
3
0
+
3
4
0
+
3
5
-
–
6
0
+
3
6
7
-
–
8
0
+
3
6
Q
.7
12K
18K
20K
Q
4K
6K
8K400
Q
1K
1.5
2K100
Q
.7
400
600
80040
– +
FREQ
200
PAN
-
AUX 8
7-8 LEV/PAN CTRL
TO SOLO
BUS ASSIGN
& CONTROL
MONO L-R 1357
L- AFL -R
SWITCHING
PA N
SWITCHES
2468
LCR PAN
X-VCA STEREO INPUT
(4 NORMALLY FITTED)
10
5
10
15
20
30
40
50
0
5
LEGENDS
VCA
1 FOR GND
ACKS)
OLO R
bus assignment features
The Input bus assignment section offers considerable flexibility for creating what
eventually becomes the main output mix. Such features as
LCR, GROUP PAN ON
and
eight-individual group assignments allow several approaches to building the
desired mix.All assignments are derived post-fader, post-eq, and post-mute.
pan control
The pan control positions the signal within the stereo left/right field,
(or between left/center or center/right in
LCR mode).The signal must be assigned
to either LCR or the L-R bus for the pan control to have any affect.
left-center -right—LCR
This feature is used to precisely position a signal in a sound system with a center
speaker cluster in addition to left and right clusters.The PA N control becomes an
integral part of how the input-signal is sent to the LEFT, CENTER, and RIGHT outputs.
The post-fader signal is assigned to the LEFT, RIGHT, and MONO/CENTER buses.
Relative amounts of the signal fed to each bus is determined by the position of
the PA N control.
mono assignment—M
The signal is assigned to the discrete mono bus.
When the LCR button is depressed, this switch is bypassed.
left / right assignment—L-R
The Input signal is assigned to the main Left and Right output buses, deriving
its signal after the channels pan system.When the LCR button is depressed, this
switch is bypassed.
pan on—groups—PAN ON
The eight GROUP assignment switches assign the input signal in mono, independent of the pan pot.
The eight GROUP assignment switches assign signals as four stereo-pairs.The
PAN
control governs the stereo placement of the four stereo-pairs, which are now
configured as odd–left / even–right.
For example: GROUP 1—left, GROUP 2—right, GROUP 3—left, GROUP 4—right, ...con-
tinuing through GROUP 8.
group 1–8 assignment
The input channel's post-fader signal is assigned to the corresponding GROUP
bus(es). see—pan on—groups
mono input module
1
If the channel's
Left/Right signal goes
way when the Pan pot is at
center, check to see if the
LCR button is down.
+
p. 22
X-VCA owner’s manual
mono input module
1
module
panel
LCR
1
2
3
4
5
6
7
8
M
L-R
PAN ON
GROUPS
PK
–
6
0
SIG
+
8
5
10
0
5
10
20
30
15
50
40
SOLO
VCA
ASSIGN
block diagram
O
E
MOD
O
X
U
+
48V
PAD
LINE
Ø
GAIN
30
40
20
50
12
72
AUX
10
–
1
0
20
+
3
30
40
6
•
10
–
2
0
20
+
3
30
40
6
•
PRE
10
–
3
0
20
+
3
30
40
6
•
10
–
4
0
20
+
3
30
40
6
•
PRE
5
6
-
–
12
6
0
+
20
3
40
6
•
7
6
-
–
12
8
0
+
20
3
40
6
•
PRE
1.5
HF
Q
.7
3
SHELF
6K
3K
12K
1.5
18K
20K
1K
1.5
HM
Q
.73
2K
4K
1K
6K
8K400
1.5
LM
Q
.73
500
1K
200
1.5
2K100
1.5
LF
Q
.7
3
SHELF
200
400
100
600
80040
– +
EQ
ON
FREQ
80
200
40
20 400
HPF
INSERT
ON
C
PAN
ODD - LR - EVEN
SAFE
PREVIEW
MUTE
T
NE
MOD
AND
VCA,
SOLO LEFT
SOLO RIGHT
VCA
SOLO
ASSIGN
MUTE
CTRL
SOLO
FR
PR
1 OF 4
MUTE
CARD
MICRO
INTERFACE
INPUT CHAN
SAFE
PREVIEW
& SWITCHING
SOLO CONTROL
BUSES 1-8
VCA MASTER
LATCHES
VCA ASSIGN
AUX SENDS
PRE-FADER
POST-PAN
L - R
FADER
CHANNEL
CV
LCR
M
L-R
PAN ON
GROUPS
PK
+
8
0
–
6
10
SIG
5
0
5
1
10
2
3
15
4
20
5
30
6
40
7
50
8
SOLO
VCA
ASSIGN
VCA SUB-CARD
VCA
FREQ
LEVEL
EQ
ON
F
00 HZ
PRE
MUTE ?
SOURCE
p. 23
mono input module
When VCA faders
become dirty or worn,
they do not become noisy
because there's no audio
going through them.
+
1
features
input fader
The input fader is the primary level control for signals being sent to any of the
consoles mix buses.The signals affected are the AUX sends selected to be prefader.The fader offers greater than 80dB of attenuation and up to 10dB of boost .
Normal operation is between -10 and 0.
The fader itself is a 100mm 10K linear taper slide potentiometer. It controls the
voltage to the channel's VCA. No audio passes through the fader.
solo switch
Pressing this momentary switch will include (illuminate) or exclude (not-illu-
minated) the channel from the consoles solo system.
See SOLO / VCA Edit switch section.
block diagram
1
p. 24
X-VCA owner’s manual
mono input module
module rear
Direct
Out
I
n
s
e
r
t
Bal Line In Bal Line In Bal Line In Bal Line In
Bal Mic In Bal Mic In Bal Mic In Bal Mic In
Direct
Out
S
e
I
n
n
d
s
e
R
e
r
t
t
u
r
n
Direct
Out
S
e
n
d
R
e
t
u
r
n
S
e
I
n
s
e
r
t
I
n
n
d
s
e
R
e
r
t
t
u
r
n
Direct
Out
Direct
Out
S
e
I
n
n
d
s
e
R
e
r
t
t
u
r
n
Direct
Out
S
e
I
n
n
d
s
e
R
e
r
t
t
u
r
n
Direct
Out
S
e
I
n
n
d
s
e
R
e
r
t
t
u
r
n
Bal Line In Bal Line In Bal Line In Bal Line In
Bal Mic In Bal Mic In Bal Mic In Bal Mic In
Direct
Out
S
e
n
d
R
e
t
u
r
n
S
e
I
n
n
d
s
e
R
e
r
t
t
u
r
n
2
p. 25
mono input module
rear panel features
direct out 1/4" TRS jack
The input channel's signal is available at this output jack.The default signal routing is derived post-fader, post-eq and post-mute.This output jack is
ground-compensated.
inser
t points
Separate 1/4" TRS jacks provide the facilities for inserting an external signal
processor into the signal path of the input channel.
insert send
This jack serves as an output for connection to the input of a signal
processor.The signal is derived after the mic preamp and HPF but before the eq
section. Plugging a 1/4" TRS plug into this jack does not break the signal flow of
the channel.This output jack is ground-compensated.
insert return
The output of a signal processor is fed to this jack. It can accept a balanced or unbalanced signal and is located pre-eq. Plugging a 1/4" TRS plug into this
jack breaks the signal flow of the channel.
balanced line-in jack—Bal Line In
Line-level signals, balanced or unbalanced, may be brought into the
input channel through this jack.The
LINE switch must be depressed for this jack to
be active.
balanced mic-in xlr connector—Bal Mic In
This balanced female XLR accepts a low-impedance microphone signal, or
a line-level signal, depending on position of the
LINE switch on the front panel.
see—mono input module, phantom power, line
2
p. 26
X-VCA owner’s manual
stereo input module
GAIN
PRE
PRE
AUX
1
2
3
4
5
6
7
8
PK
SIG
L
R
ODD - LR - EVEN
BAL
STEREO INPUT
MUTE
SAFE
PREVIEW
=
HPF
20 400
40
80
200
EQ
ON
PRE
5
6
3
4
7
8
1
2
600
1K
2K
3K
8K
400
5K
LF
LM
HM
HF
150
500
1K
2K
100
60
400
800
40
M
L-R
BAL ON
GROUPS
40
12
6
0
6
•
3
20
+
–
40
12
6
0
6
•
3
20
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
3K
6K
12K
20K
1K
18K
1.5
15
6
0
6
25
10
3
+–
0
1515
88
+–
0
1515
88
+–
0
1515
88
+–
0
1515
88
+–
5
10
0
5
10
20
30
15
50
40
SOLO
VCA
ASSIGN
LINE 2
Ø
MONO
L
R
GAIN
15
6
0
6
25
10
3
+–
LINE 2
Ø
MONO
L
R
2
p. 27
stereo input module
features
The Stereo Input Module can be configured to accept either a stereo pair of signals or a standard mono signal. Unlike the Mono Input module, the Stereo input
modules do not have mic preamps and their associated features (48 V phantom
power and PAD). Instead, the Stereo Input module accepts line level signals via
multiple pairs of input connectors - RCA, 1/4" TRS and Female XLR.When configured as a Stereo Module, the Left and Right signals are kept separate throughout
the module. Settings in the EQ section apply equally to both L & R signals.
Input signal switching
There are six Input connectors on the back of the module - three stereo pairs.
The primary pair of connectors are Female XLR.This Left / Right pair makes up
"Balanced Line In 1".The secondary connectors are 1/4" balanced TRS and unbalanced RCA. These connectors make up "Line In 2".The TRS connectors override the RCA connectors.
Line select - Line 2 switch
The channel is in LINE 1 MODE.The signals are brought in via the left and
right line-input XLRs located on the rear panel.
The channel is in LINE 2 MODE.The signals are brought in via the RCA line
input connectors which are normalled through the 1/4" TRS line-input jacks.
Insertion of a plug into the 1/4" jack disconnects it's associate RCA jack.
left and right mono-switches
These switches provide several options for configuring the stereo line-input module as a mono line-input module.
left right
Signals brought into the left and right inputs are treated as stereo throughout the
module.
left right
Signals brought into the left and right inputs are summed together immediately
before the
GAIN control.The summed signal is treated as mono throughout the
rest of the module.
left right
The signal fed to the left input is treated as a mono signal throughout the module.
No signal from the right input is used.
left right
The signal fed to the right input is treated as a mono signal throughout the module. No signal from the left input is used.
p. 28
stereo input module
2
X-VCA owner’s manual
GAIN
PRE
PRE
AUX
1
2
3
4
5
6
7
8
PK
SIG
L
R
ODD - LR - EVEN
BAL
STEREO INPUT
MUTE
SAFE
PREVIEW
=
HPF
20 400
40
80
200
EQ
ON
PRE
5
6
3
4
7
8
1
2
600
1K
2K
3K
8K
400
5K
LF
LM
HM
HF
150
500
1K
2K
100
60
400
800
40
M
L-R
BAL ON
GROUPS
40
12
6
0
6
•
3
20
+
–
40
12
6
0
6
•
3
20
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
3K
6K
12K
20K
1K
18K
1.5
15
6
0
6
25
10
3
+–
0
1515
88
+–
0
1515
88
+–
0
1515
88
+–
0
1515
88
+–
5
10
0
5
10
20
30
15
50
40
SOLO
VCA
ASSIGN
LINE 2
Ø
MONO
L
R
GAIN
15
6
0
6
25
10
3
+–
LINE 2
Ø
MONO
L
R
2
p. 29
stereo input module
features
polarity reverse—ø
This switch inverts the polarity of the right input signal in relation to the left input
signal. see—mono input module for more info on polarity reverse
Polarity of the right input signal is inverted.
Polarity of the right input signal is not inverted.
input gain—
GAIN
This control adjust the gain of the input preamp(s).
Both left and right input signals are affected by this control.
2
p. 30
stereo input module
X-VCA owner’s manual
GAIN
PRE
PRE
AUX
1
2
3
4
5
6
7
8
PK
SIG
L
R
ODD - LR - EVEN
BAL
STEREO INPUT
MUTE
SAFE
PREVIEW
=
HPF
20 400
40
80
200
EQ
ON
PRE
5
6
3
4
7
8
1
2
600
1K
2K
3K
8K
400
5K
LF
LM
HM
HF
150
500
1K
2K
100
60
400
800
40
M
L-R
BAL ON
GROUPS
40
12
6
0
6
•
3
20
+
–
40
12
6
0
6
•
3
20
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
3K
6K
12K
20K
1K
18K
1.5
15
6
0
6
25
10
3
+–
0
1515
88
+–
0
1515
88
+–
0
1515
88
+–
0
1515
88
+–
5
10
0
5
10
20
30
15
50
40
SOLO
VCA
ASSIGN
LINE 2
Ø
MONO
L
R
PRE
PRE
AUX
PRE
5
-
6
3
4
7
-
8
1
2
40
12
6
0
6
•
3
20
+
–
40
12
6
0
6
•
3
20
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
40
20
10
0
6
•
3
30
+
–
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