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1
2
3
TRIM: MIC GAIN-
0 to +60 dB
LINE GAIN-
-15 to +45 dB
LO CUT
MUTE
INSERT
-20 dB LED
EQ
LO MID HI
80 8k 12k
100-
GAIN
FREQ
GAIN
GAIN
FADER
PAN
O/L LED
ASSIGN
SWITCHES
1-2
3-4
L-R
SOLO IN
PLACE
PFL
LOGIC
MUTE
LED
AUX 1
AUX 2
AUX 3
AUX 4
AUX 5
AUX 6
PRE
MONO
INPUT
CHANNEL
(1 of 20)
SR24•4-VLZ PRO
BLOCK DIAGRAM REV 2 3/2004
BOLD LINES INDICATE
SIGNAL PATH FROM MIC
INPUT TO LEFT MAIN OUTPUT.
LEFT
(MONO)
RIGHT
TRIM
-20dB
LED
LO LO- HI- HI
MID MID
LO LO- HI- HI
80 800 3k 12k
MID MID
O/L
LED
FADER
PRE-FADER
PRE-FADER
POST-FADER
POST-FADER
LINE GAIN-
-20 TO +20dB
+
-
+
-
+
-
MUTE
LED
AUX 1
AUX 2
AUX 3
AUX 4
AUX 5
AUX 6
PRE
STEREO INPUT CHANNEL (1 OF 2)
STOPLIGHT
EXIT 27B
316 GLENDALE
(KNOCK FIRST AND
SAY SID SENT YOU)
TALKBACK
XLR INPUT
LEVEL
TB TO AUX 1-2
TB TO L-R MIX
1-2
3-4
L-R/SUBS
LEVEL
AUX RET 4 IN
AUX RET 3 IN
AUX RET 1 (2) IN
LEVEL
LEVEL
SOLO
SOLO LED
AUX SEND
(1 OF 6)
AUX 1
OUTPUT
+
-
+
-
+
-
+
-
+
-
+
-
L
L
L
R
R
R
L
R
PHONES
OUTPUTS
PHONES
AMPS
RELAY
AUX SEND 1 (2)
SOLO
LEVEL
PFL/AFL
LEVEL
RUDE SOLO LED
TAPE TO
MONITOR
L
R
CONTROL
ROOM OUT
SOLO RELAY
TAPE IN
R MIX
L MIX
INSERTS
FADER
RIGHT
XLR
OUT
LEFT
XLR
OUT
MONO
XLR
OUT
RIGHT
OUT
R
L
TAPE OUT
LEFT
OUT
MONO
LEVEL
SUB
OUT
1
SUB
OUT
5
FADER
SUB OUT 1 (1 OF 4)
ASSIGN
TO L-R
PAN
TAPE TO L-R
SOLO
PFL
LOGIC
GAIN
AIR
16kHz
MIC
IN
LINE
IN
+22
+10
+7
+4
+2
0
-2
-4
-7
-10
-20
-30
-40
METERS
SUB 1
SUB 2
SUB 3
SUB 4
AUX 1
AUX 2
AUX 3
AUX 4
AUX 5
AUX 6
L MIX
R MIX
SOLO L
SOLO R
PFL
LOGIC
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Vp
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SOLO
•
∑
LEVEL
ØdBu=Ø VU
∑
∑
•
∑
∑
∑
∑
∑
•
•
∑
∑
MONITOR LEVEL
1
2
3
1
2
3
1
2
3
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∑
∑
∑
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•
1-2
3-4
L-R
SOLO IN
PLACE
PFL
LOGIC
•
80 800 3k 12k
•
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•
PAN
INSERT
•
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•
MUTE
PHANTOM POWER
(GLOBAL SWITCH)
MACKIE XDR
MIC PREAMP
75Hz
HPF
BLOCK DIAGRAM
