Filter
Top Products
4
Block Diagram
M•1200/M•1400
DIMENSIONS
CH 1
BALANCED
LINE INPUT
(TRS)
CH 1
BALANCED
LINE INPUT
(XLR-F)
LIMITER
LIMITER
ON
OFF
LOW CUT
FILTER
LOW PASS
FILTER
(SUBWOOFER)
+
–
80 VDC
+
–
90 VDC
TOROIDAL POWER
TRANSFORMER
LAMP
INTERNAL
FUSE
MACKIE DESIGNS
M•1200/M•1400
BLOCK DIAGRAM
(#011497DF)
FREQ
CD EQ
FREQ
OUTPUT
APPLICATION
SWITCH
AMP
MODE
SWITCH
63 Hz
125 Hz
FREQ
TO
LIMITER
ON
OFF
LOW CUT
FILTER
FREQ
CD EQ
FREQ
CH 1
GAIN
STEREO
MONO
BRIDGE
CH 2
GAIN
INVERTING
UNITY GAIN
AMPLIFIER
ON
OFF
SUB
ON
OFF
SUB
NC
NC
NC
MUTE
CH 1
PROTECT
LED
CH 1
SHORT
LED
MUTE
CH 2
PROTECT
LED
POWER
AMPLIFIER
CH 1
SPEAKER
OUT
FUSE
–80VDC
FUSE
+80VDC
DC OFFSET
DETECT
SHORT
DETECT
METER
DRIVE
POWER
AMPLIFIER
CH 2
SPEAKER
OUT
FUSE
–80VDC
FUSE
+80VDC
DC OFFSET
DETECT
TO CH 1
MUTE
OL
–3
–6
–9
–20
SIG
CH 1
SIG
CH 2
SHORT
LED
SHORT
DETECT
METER
DRIVE
TO CH 2
MUTE
OL
–3
–6
–9
–20
SIG
CH 2
SIG
SIG
(TO CH 1
METER DRIVE)
SIG
(TO CH 2
METER DRIVE)
PD's LEASH
HOT
LED
COLD
LED
TEMP
SENSOR
(ON HEATSINK)
TO CH 1
AND CH 2
MUTE
CH 1 AMP OUT
CH 2 AMP OUT
CH 1 MUTE
CH 2 MUTE
60ºC
DETECTOR
FA N
SPEED
CONTROL
HI DCV
LO DCV
CH 1
MUTE
CH 2
MUTE
POWER
SWITCH
TO CH 1
AND CH 2
MUTE
THERMAL
PROTECT
THRU
(XLR-M)
CH 2
BALANCED
LINE INPUT
(TRS)
CH 2
BALANCED
LINE INPUT
(XLR-F)
THRU
(XLR-M)
80ºC MUTE
55ºC UNMUTE
FA N
TO HUSKY
STADIUM
1/4" TS JACK
M•1200 only
1/4" TS JACK
M•1200 only
OL
–3
–6
–9
–20
–3
–6
–9
–20
SIG
OL
SIG
CH
1
30
28
26
20
22
18
2416
14
8
0
0
1.23v (+4dBu)
SENSITIVITY
GAIN/dB
CH
2
PROTECT
COLD HOT
SHORT
TEMP STATUS
INTERNAL STATUS
CH
1
CH
2
CH
1&2
ON
OFF
POWER
3v
2v
1v
30
28
26
20
22
18
2416
14
8
0
0
1.23v (+4dBu)
SENSITIVITY
GAIN/dB
3v
2v
1v
PROFESSIONAL POWER AMPLIFIER
FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN
19.00" (48.3cm)
17.25" (43.8cm)
15.25" (38.7cm)
3.50"
(8.9cm)
2U
16.25" (41.3cm)
M•1200/1400
WEIGHT
36 lbs.
(16.3 kg)
1.25"
(3.2cm)
Built-in subwoofer crossover.
The amplifier has a sub-
woofer mode that allows you
to turn on the built-in sub-
woofer crossover. When
activated, the signals appear-
ing at the left and right inputs
are summed, directed to a
low-pass filter, and routed
to both output stages. A
switch selects the cutoff fre-
quency of the filter at either
63Hz or 125Hz, and the ampli-
fier can be set to either mono
or bridge mode of operation.
Built-in constant directivity
horn compensation.
When a compression driver
is attached to a constant
directivity (CD) horn, it requires
a certain amount of high-