Mackie SR244-VLZ User Manual
SR24•4-VLZ PRO
™
24-Channel Sound Reinforcement Console
Introduction
THE SR24•4-VLZ PRO is the latest update of our SR24•4
sound reinforcement console, incorporating our ultra-high
quality XDR™ (Extended Dynamic Range) mic preamps with
the best RFI rejection of any sound reinforcement mixer
design on the market.
Like all Mackie mixers, the SR24•4-VLZ PRO is designed
for rugged, 24-hour-a-day use. With its multiple input/
output congurations, true 4-bus architecture, 6 aux
sends, and extensive routing capabilities, it can be used
in a variety of live sound and recording applications. Its
sturdy steel construction houses rugged, double-sided
SMT-plated berglass circuit boards, and 60 mm faders
with ultra-tight lip seals for keeping out dust and other
contaminants. Impact-resistant knobs are mounted so they
“ride” just above the steel chassis.
The SR24•4-VLZ PRO has 20 mono mic/line input chan-
nels, with XLR mic inputs and 1/4" TRS line inputs, and 2
stereo line input channels with 1/4" TRS inputs. All mono
channels have TRS insert jacks (tip = send, ring = return).
Each channel strip has an input trim, 6 aux sends (2 prefader, 2 post-fader, and 2 switchable pre or post), 3-band
EQ with sweepable midrange (4-band EQ on the stereo channels), pan control, and mute, solo, and bus assign switches.
A 60 mm fader provides output gain for each channel.
Twenty XDR mic preamps provide high-headroom and
low-noise. They are impedance-independent, so the
quency response remains constant whether the mic preamp
is presented with an extremely high- or low-impedance
load. Additionally, each channel has its own switchable
low-cut lter (18 dB/octave @ 75 Hz).
The mono channel EQs provide a range of ±15 dB at the
following frequencies: 12 kHz shelving high-frequency EQ,
100 Hz to 8 kHz sweepable peaking mid-frequency EQ,
and 80 Hz shelving low-frequency EQ. The stereo channels
(21-24) provide ±15 dB of boost and cut at the following
frequencies: 12 kHz shelving high-frequency EQ, 3 kHz
peaking high-mid frequency EQ, 800 Hz peaking low-mid
frequency EQ, and 80 Hz shelving low-frequency EQ.
(continued on page 2)
fre-
Features
Low noise/high headroom XDR™ (Extended Dynamic
Range) mic preamps with excellent RFI rejection
New high-performance 2068 op-amps for incredibly low
noise and distortion
Improved cooling for even greater thermal protection
20 mic/line mono, and 2 stereo line channels
True 4-bus design
Solo, pan, and 16 kHz Air EQ on each submaster
6 individual aux sends per channel (2 pre, 2 post,
2 switchable pre/post)
3-band swept midrange EQ on mic channels;
4-band xed on stereo line channels
75 Hz low-cut lters on mic channels
Mute, solo, signal present and OL LEDs on every channel
6 aux send masters with individual solos
4 stereo aux returns with EFX monitor
Separate Talkback section with mic preamp
Double-bused sub outs for easy multi-track routing
Balanced stereo TRS & XLR main outputs
Balanced XLR mono output with level control
MIXER
SR24•4-VLZ PRO
R E L A T E D P R O D U C T S
SR32•4-VLZ PRO
Applications
Live sound mixing
Multi-track recording
O F 8 P A G E S
1
24-Channel Sound
SR24•4-VLZ PRO
MIXER
Specications
Noise
(20 Hz to 20 kHz bandwidth, Line inputs to Main L/R outputs,
all channels assigned, panned L/R):
Master fader down, Ch. gains down –94.7 dBu
Master fader @ unity, Ch. gains down –87.4 dBu
Master fader @ unity, Ch. gains @ unity –83.5 dBu
Total Harmonic Distortion
(1 kHz @ +14 dBu, 20 Hz-20 kHz):
Mic input insert output <0.0007%
SR24•4-VLZ PRO
Other outputs <0.004%
Crosstalk
(1 kHz @ 0 dBu, 20 Hz to 20 kHz bandwidth, channel in to
Main Left outputs):
Channel fader down, channels at Unity –89.5 dB
Channel muted, channels 2-16 at Unity –88.7 dB
Frequency Response
(any input to any output):
20 Hz to 60 kHz +0/–1dB
10 Hz to 100 kHz +0/–3dB
Maximum Levels
Mic preamp input +22 dBu
All other inputs +22 dBu
Balanced XLR outputs +28 dBu
All other outputs +22 dBu
Impedances
Mic preamp input 1.5 kΩ
All other inputs >10 kΩ
All outputs 120 Ω
Equalization
Lo EQ Shelving 80 Hz +15 dB
Mid EQ (mono ch) Peak 100 Hz-8 kHz +15 dB
Hi EQ Shelving 12 kHz +15 dB
Microphone Preamp
E.I.N. (150 Ω terminated, max gain) –129.5 dBm
Power Requirements
60 watts
Reinforcement Console
(continued from page 1)
Channels can be assigned to buses 1-2, 3-4, and
Main Mix L/R, and the 4 subs can be assigned to
Left
and Right Main Mix. Furthermore, each bus is
“double-bused,”
connected to an 8-track recorder without repatching.
Each sub out (1-4) and main out (L/R) has a TRS insert
jack. Furthermore, Mackie’s unique “AIR” EQ circuit is
included on each of the four subgroups. It provides a
gentle nudge to the extreme high-end, without affecting lower treble octaves.
Outputs include XLR and 1/4" TRS line outputs for
the left and right mains, 1/4" TRS line outputs for
subs 1-4, and an XLR mono main output. The mono
main out has its own level control, so a mono mix can
be sent to another zone and adjusted accordingly.
The Phones/Control Room switch and level control
are connected to two stereo headphone outputs and
the left and right Control Room output, allowing the
stereo Tape Return, Left/Right Main Mix, and Solo to
be monitored.
A stereo playback device can be monitored via the
Tape Return Inputs. Tape Return to Phones/C-R routes
the tape playback signal into the monitor system and
meters, and the Tape Return knob adjusts the level of
playback, which can be monitored via headphones.
Tape Return signals can also be assigned directly to
the Main Mix. The SR24•4-VLZ PRO also has RCA-style
Tape Outs for output to conventional stereo recording
devices.
Each of the six aux sends has its own individual
master send control, driving 1/4" TRS output jacks.
Six stereo aux returns are provided, with 1/4" TRS
input jacks. Two aux returns can be folded back into
Aux Sends 1 and 2 via their own volume controls to
add effects in stage monitors.
An XLR input is provided for a talkback mic, which
can be assigned to the Main Mix or to Aux 1-2. The
talkback mic has a level control in the talkback section.
providing eight outputs that can be
Physical
Dimensions (HxWxD): 5.60" x 31" x 19.20"
142.24 mm x 787.40 mm x 487.68 mm
Net Weight: 24•4-VLZ PRO 31 lbs (14 kg)
2
O F 8 P A G E S
SR24•4-VLZ PRO
24-Channel Sound
Reinforcement Console
O F 8 P A G E S
dB
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+15
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+15
MAX
MA
X
U
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5
+100
5
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L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R
U
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4
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U
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+15dB
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POS
T
+15dB
-
45dB
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U
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d
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POST
POST
+15dB
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M
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d
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POST
+15dB
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POS
T
+15dB
-
45dB
M
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d
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+15dB
-
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M
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+15dB
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45dB
M
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+15dB
-
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M
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POST
+15dB
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M
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+15dB
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M
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+15dB
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M
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+15dB
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M
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POST
POST
+15dB
-
45dB
M
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U
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POST
POST
+15dB
-
45dB
M
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A
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0
U
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POST POST
POST
POST
POST
POST
+15dB
-
45dB
M
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A
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U
60
-
1
0
d
B
V
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
600
1.5k150
8k100
16kHz16kHz16kHz16kHz
LAMP
12k
HI
3k
MID
HI
800Hz
MID
LOW
EQ
STEREO
AUX RETURNS
AUX SEND
MASTERS
LEVEL
5
6
12k
HI
3k
MID
HI
800Hz
MID
AIR AIR AIR AIR
LOW
SOLO SOLO SOLO SOLO
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
80Hz
LOW CUT
75 Hz
18dB/OC
T
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OC
T
LOW CU
T
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OC
T
LOW CU
T
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OC
T
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CU
T
75 Hz
18dB/OC
T
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW CUT
75 Hz
18dB/OCT
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
80Hz
LOW
TRIM
1
AUX
1
MUTE
EQ
1
2
3
4
1
2
1
2
3
4
SOLO
SOLO
1
-
2
SUB
SOLO
GLOBAL
AUX RETURN
ASSIGN
TO SUB
SOLO
SOLO
TAPE RETURN
TO PHONES / C
R
TAPE RETURN
TO MAIN MIX
LEFT/RIGHT
MAIN MI
X
AUX
1
-
2
TALKBACK
LEVEL
TAPE
RETURN
3
-
4
LEFT RIGHT
L/R ASSIGN L/R ASSIGN L/R ASSIGN L/R ASSIGN
SUB SUB SUB SUB
1 2 3 4
PHONES / C
-
R
LEVEL
MAIN MIX
SOLO
TO AUX
SEND
1
-
2
(EFX TO MONITOR)
SOLO
28
CLIP
10
74 22047
102030
40
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
3
-
4
L
-
R
1
-
2
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
2
AUX
2
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MI
D
FREQ
TRIM
3
AUX
3
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
4
AUX
4
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MI
D
FREQ
TRIM
5
AUX
5
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
6
AUX
6
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MI
D
FREQ
TRIM
7
AUX
7
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
8
AUX
8
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
9
AUX
9
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
10
AUX
10
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
11
AUX
11
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
12
AUX
12
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
13
AUX
13
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
14
AUX
14
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
15
AUX
15
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
16
AUX
16
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
17
AUX
17
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
18
AUX
18
MUTE
EQ
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
TRIM
19
AUX
19
MUTE
EQ
-20
OL
-20
OL
-20
OL
PR
E
1
PRE
PR
E
2
3
5
6
12k
HI
MID
FREQ
TRIM
20
TRIM
21
22
TRIM
23
24
AUX
PRE1PRE
PR
E
2
3
5
6
AUX
PRE1PRE
PR
E
2
3
5
6
AUX
20
MUTE
EQ
21 22
MUTE
23 24
TRACK
1•5
TRACK
2•6
TRACK
3•7
TRACK
4•8
MUTE
SOLO
MODE
SUBAUX
PRE FADER
IN PLACE AFL
LEVEL SET
SOLO
SOLO SOLO
SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO
PANPANPAN PANPAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN PAN
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
4
POWERRUDE
SOLO
LIGHT
OPERATING LEVEL
0dB = 0dBu
PAN
MUTE /
SO
LO
MUTE /
SO
LO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SO
LO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SO
LO
MUTE /
SO
LO
MUTE /
SO
LO
MUTE /
SOLO
MUTE /
SOLO
MUTE /
SO
LO
MUTE /
SOLO
WITH PREMIUM XDR
TM
MIC PREAMPL IFIERS
SR SERIES 24•4•2 4
–
BUS MIXING CONSOLE
SR
24•4
-
VLZPRO
SR24•4-VLZ PRO
SR24•4-VLZ PRO Top
24-Channel Sound
Reinforcement Console
3
O F 8 P A G E S
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