Output Section Description; Source; Main Mix; Architecture - Mackie 1202 VLZ Owner's Manual

OUTPUT SECTION DESCRIPTION

MAIN MIX

As the name implies, this knob controls the
levels of signals sent to the main outputs: XLR
LEFT and RIGHT , " MAIN OUTS
1 ⁄
4
TAPE OUTPUT . All channels and AUX RE-
TURNS that are not muted or turned fully down
will wind up in the MAIN MIX.
Fully counterclockwise is off, the center detent
is unity gain, and fully clockwise provides 10dB
additional gain. This additional gain will typically
never be needed, but once again, it' s nice to know
it's there. This is the knob to turn down at the end
of the song when you want The Great Fade-Out.

VLZ MIX ARCHITECTURE

When designing a mixing cir-
cuit, the lowest noise and best
crosstalk specs are achieved by
using Very Low Impedance
(VLZ). To implement VLZ in a mixer, the power sup-
ply must be able to deliver plenty of current to the
circuitry. That' s why those "wall wart" mixers are of-
ten noisy–they can't power a VLZ circuit.
At Mackie, audio quality is much more important
than the price of wall warts. All of our mixers employ
VLZ and built-in power supplies that deliver more
than enough current, resulting in sonic specifications
that rival consoles upwards of $50,000!

SOURCE MATRIX

Typically, the engineer sends the MAIN MIX to
an audience (if live) or a mixdown deck (if record-
ing). But what if the engineer needs to hear
something other than the MAIN MIX? With the
New Improved MS1202-VLZ, the engineer has sev-
eral choices of what to listen to. This is one of
those tricky parts, so buckle up.
Via the SOURCE switches, you can choose to
listen to any combination of MAIN MIX, ALT 3-4
and TAPE. By now, you probably know what the
MAIN MIX is. ALT 3-4 is that additional stereo mix
bus . TAPE is the stereo signal coming in from
the TAPE INPUT RCA jacks .
Selections made in the SOURCE matrix deliver
stereo signals to the CONTROL ROOM, PHONES
and meter display. With no switches engaged,
there will be no signal at these outputs and no
and RCA
meter indication.
The exception to that is the SOLO function .
Regardless of the SOURCE matrix selection,
engaging a channel's SOLO switch will replace
that selection with the SOLO signal, also sent
to the CONTROL ROOM, PHONES and right
meter (the left meter becomes inactive). This
is what makes the Level-Setting Procedure
so easy to do.
back path between TAPE INPUT and TAPE
OUTPUT. Make sure your tape deck is not
in record, record-pause, or input monitor
mode when you engage these switches, or
make sure the CONTROL ROOM / PHONES
level knob is fully counterclockwise (off).
O O
AUX 1 MASTER
MON/PRE
POST
AUX 1
SELECT

SOURCE

ASSIGN
TO MAIN MIX
O O
CONTROL
/ PHONES
ROOM
WARNING: Engaging
both the TAPE and
ASSIGN TO MAIN MIX
buttons in the SOURCE
matrix can create a feed-
U U
1
+10 O O +20
NORMALLED
U
2
AUX
EFX TO
+20 RETURN
O O
MONITOR
POWER
LEFT RIGHT
0dB=0dBu
+28 CLIP
+10
MAIN
MIX
+7
+4
ALT 3 - 4
+2
0
-2
TAPE
-4
-7 LEVEL SET
-10
-20
-30
RUDE
SOLO
LIGHT
U
U U
BAL
MAX +10dB
O O
MAIN MIX
21