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7/1/95
LM-3204E Expander
any of the LM-3204's 16
channels.
Signal Present LEDs on
every channel.
The
LM-3204's
–20dB
LEDs light
whenever
there is a
signal level
of +20dBu
at 1kHz or
above at
the inputs
of that channel strip. In
practice, this LED will
toring outputs, each with
its own level control. Moni-
toring controls consist of a
stereo Control Room fader,
the Phones level control
(with a handy Phones jack
just below it), and the Tape
Monitor switch. Control
Room and Phone monitor
outputs always share the
same sources:
■ The main Left and Right
buses under normal
conditions;
■ The output of your tape
recorder (or some other
source patched into the
Tape In jacks) when the
Tape Monitor switch is
pushed, or;
■ The stereo solo buses
whenever any Solo
switch is pressed. The
solo circuits override the
Tape Monitor switch.
In the up position, the
Tape Monitor switch
selects the main Left and
Right bus outputs for the
monitor circuits and the
meters. In the down posi-
tion, the Tape Monitor
switch selects the Tape
AUX Return 3 inputs are
disconnected. Instead,
the outputs of the ALT 3-
4 buses are routed into
the AUX Return 3 control
and circuitry. This allows
you to use ALT 3-4 as a
pair of submix buses and
then remix them back
into the main Left and
Right buses.
AUX Return to Con-
trol Room Only for AUX
Return 4. When this
switch is up, AUX Return
4 functions normally.
When the switch is
down, the AUX Return 4
is disconnected from the
main Left and Right
buses and is reconnected
to the control room
monitor and headphone
circuits (where it is mixed
back in with Left and
Right signal on its way to
the Monitor section). This
allows you to wet moni-
tor or send performers a
cue or click feed without
having it go onto tape.
Main Outputs are elec-
tronically balanced and
capable of driving record-
ers at either +10dBV or
+4dBu. 1/4" TS Tape In
jacks provide a monitor
return for deck output.
Tape In jacks are routed
through the Tape Monitor
switch in the Main Out-
put section which can
send the signal to the
Control Room and
Phones buses. The LM-
3204 also has four unbal-
anced RCA-type connectors
with Out RCA jacks con-
nected in parallel to the
Main Output jacks.
Expandable with
the LM-3204E.
Need 32, 48 or even 64
stereo line inputs without
adding significant noise or
degrading overall head-
room? The LM-3204E is
essentially an LM-3204
without the master section.
It includes 16 stereo chan-
nels and four Aux returns.
Connection is via a propri-
etary ribbon cable. The
LM-3204E also includes a
ribbon cable input so that
expanders can be daisy-
chained.
All the “hidden” things
Mackie is noted for.
Such as a built-in power
supply with IEC cord, built-
in RFI protection and sealed
rotary potentiometers. The
LM-3204's front panel cir-
cuit board is a horizontal,
through-hole-plated fiber-
glass slab attached with
solid brass standoffs that
flicker or light almost con-
stantly when there is
activity in that channel,
and it basically serves as a
convenient way of figuring
out what's plugged into
where.
New monitor and
tape features
The LM-3204 also intro-
duces new features that
provides real flexibility for
both live and studio appli-
cations.
It has separate Control
Room and Phone moni-
Inputs for the monitor
circuits and the meters.
Control Room outputs are
provided for connection
to a power amplifier
(without tying up your
headphone output).
The LM-3204's four
stereo Aux returns include
two new features:
Source ALT 3-4 switch
for AUX Return 3. With
the switch up, AUX Return
3 is just what it's adver-
tised to be: an AUX
Return. When the Source
ALT 3-4 switch is down,
+
-
+
-
LEFT (MONO)
LINE IN
BALANCE
BAL/UNBAL
INPUTS
+
-
RIGHT
LINE IN
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L
R
L
R
L
R
L
R
L
R
MAIN 1-2
ALT 3-4
AUX 1
AUX 3
AUX 4
AUX 2
SOLO
CONTROL
INSERT
(CH’s 1-4)
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MUTE/
ALT 3-4
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LEVEL
LEVEL
SOLO
AUX 1/3
AUX 2/4
CONTROL
STEREO
CHANNEL
1 of 16
CLIP LED
-20 LED
•
10
CLIP
7
4
2
0
-2
-4
-7
-10
-20
-30
-40
RL METER
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LEFT
MAIN
OUT
RIGHT
MAIN
OUT
L
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LEFT (MONO)
AUX RETURN 1
RIGHT
LEVEL
•
LEFT (MONO)
AUX RETURN 2
RIGHT
LEVEL
48 V
TRIM
MIC 1
OUT
MIC 2
OUT
TRIM
OPTIONAL
LM-3204E
EXPANDER
MACKIE
MIC PREAMPS
SOURCE ALT 3-4
RET 4 TO
CONTROL ROOM ONLY
•
LEFT (MONO)
AUX RETURN 3
RIGHT
LEVEL
•
LEFT (MONO)
AUX RETURN 4
RIGHT
INSERT
(CH’s 1-4)
LO MID HI
EQ
LO MID HI
EQ
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S
+
-
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L MAIN
INSERT
R MAIN
INSERT
+
-
+
-
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SOLO
LEVEL
SOLO
RELAY
DRIVER
L FADER
R FADER
TAPE
MONITOR
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S
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S
S
C/R FADER
PHONES
LEVEL
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S
S
S
S
R
CONTROL
ROOM OUT
PHONES
OUT
TAPE IN
LEFT
TAPE IN
RIGHT
L
R
ALT 3-4
OUT
L ( MONO)
R
AUX 1
OUT
L ( MONO)
R
AUX 3
OUT
AUX 2
OUT
AUX 4
OUT
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To Schenectady
S
S
SHIFT