Quick Start; Installation - Mackie M1200/M1400 Owner's Manual

READ THIS PAGE!

QUICK START

I got ants in my pants and I got to dance!

INSTALLATION

amps can be mounted in
any standard rack system
(see
tally on a floor or table. The heavier internal
components are located towards the front of
the chassis to make it easier to hold the amp
by its front handles.
IMPORTANT: The
M•1200/M•1400 amps
draw their ventilation air
in from the front and out
through the side panels.
They need plenty of fresh air to stay cool.
DO NOT BLOCK THE VENTILATION PORTS
(see ).
CONNECTIONS AND SETTINGS
1. Be sure the POWER
making connections.
2. Turn the GAIN
(counterclockwise) for now.
3. Set both LOW CUT FILTER
their TYPICAL marks (35Hz).
4. Set both CONSTANT DIRECTIVITY
switches OFF (unless you're using constant
directivity horns with compression drivers).
5. Set the LIMITER
Note: If you're using the M•1200/M•1400 to
power a subwoofer, you probably do not need
an external crossover. Please see
FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN
CH GAIN/dB GAIN/dB CH
OL OL
1 2
3v 3v
20 20
–3 –3
18 22 18 22
2v 2v
16 24 –6 –6 16 24
14 26 –9 –9 14 26
–20 –20
8 28 8 28
30 30
1v 1v
SENSITIVITY 1.23v (+4dBu) SENSITIVITY 1.23v (+4dBu)
SIG SIG
4
The M•1200/M•1400
), or placed horizon-
switch is off before
controls fully down
controls to
switch on.
for details.
CH CH
1 2
INTERNAL STATUS
PROTECT
SHORT
TEMP STATUS
CH
1& 2
COLD HOT
6. Determine which AMP MODE
for your application:
• STEREO mode (separate left and right
inputs, separate left and right outputs) is
the typical setup for amplifying stereo
signals.
• MONO mode (sometimes called Dual-
Mono mode – one mono input, two mono
outputs) is for sending a mono signal to
two different speaker sets, with separately-
adjustable level controls.
• BRIDGE mode (sometimes called
Bridged-Mono – one mono input, one mono
output) uses both sides of the amp to
double the power to one speaker set. An
M•1200 power amplifier, set to BRIDGE
mode, delivers 1200 watts (into 4 ohms).
The M•1400 delivers 1260 watts. Garsh!
Note: 4 ohms is the minimum impedance
you should connect to the amplifier in BRIDGE
mode. If you connect a lower impedance load
in BRIDGE mode, the SHORT
light, putting the amplifier into PROTECT
mode.
Set the AMP MODE
7. In STEREO mode, connect line-level cables
from your signal source to the M•1200/
M•1400's INPUT
jacks, either XLR or
TRS:
• The XLR and TRS inputs for each
channel are wired in parallel.
• The balanced XLR inputs are wired
pin 2 = hot (+), pin 3 = cold (–) and
pin 1 = shield (ground).
PROFESSIONAL POWER AMPLIFIER
is best
LEDs may
switch accordingly.
ON
OFF
POWER