Block Diagram

 

 

METER –3

 

 

 

 

 

 

 

 

 

METER –3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17.25" (43.8cm)

 

OL

DRIVE

–20

SIG

1CH SIG

CH 1

SPEAKER OUT 1/4"TS JACK

M•1200only

 

OL

DRIVE

–20

SIG

2CH SIG

CH 2

SPEAKER

1/4"TS JACK

M•1200only

HUSKYTO

STADIUM

 

 

 

 

 

 

(16.3 kg)

 

 

–6

–9

 

 

 

 

 

 

 

 

–6

–9

 

 

 

 

 

OUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M•1200/1400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WEIGHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36 lbs.

CH 1 SHORT LED

SHORT

DETECT

 

DC OFFSET

DETECT

 

 

CH 2

SHORT

LED

SHORT

DETECT

 

DC OFFSET

DETECT

 

 

 

 

 

 

 

 

 

FAN

 

 

 

 

 

TO CH 1

MUTE

 

 

FUSE

 

POWER AMPLIFIER

FUSE

 

 

TO CH 2

MUTE

 

 

FUSE

 

POWER AMPLIFIER

FUSE

 

 

 

 

FAN

SPEED

CONTROL

 

 

 

 

 

 

 

 

 

 

+80VDC

 

–80VDC

AMPMUTE

 

 

 

 

 

 

+80VDC

 

 

–80VDC

 

 

 

 

 

MUTE CH 1 MUTE

 

HI DCV

LO DCV

 

 

 

 

CH 1

PROTECT

LED

 

LIMITERMUTE

CH 1

MODE SWITCH

 

 

CH 2

PROTECT

LED

 

LIMITERMUTE

 

CH 2

MUTE

60ºC

DETECTOR

1CHTO

2CHAND

CH 2 MUTE

OUTAMP1CH OUTAMP2CH

(41.3cm)16.25"

M•1200/M•1400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIMENSIONS

 

 

 

 

 

 

CH1 GAIN

INVERTING

GAINUNITY AMPLIFIER

 

STEREO

MONO

NC

 

 

 

CH2 GAIN

 

 

 

HOT

LED

80ºCMUTE

55ºCUNMUTE

 

COLD

LED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BRIDGE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15.25" (38.7cm)

OUTPUT

APPLICATION ON SWITCH

OFF

SUB

 

TO LIMITER

NC

NC

ON

OFF

SUB

 

 

TEMP SENSOR

(ON HEATSINK)

+

90 VDC

–

1.25" (3.2cm)

 

 

 

 

 

FREQ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

63 Hz

125 Hz

LOW PASS FILTER (SUBWOOFER)

 

 

 

PD's LEASH

 

 

 

+

80 VDC

–

 

SIG (TO CH 1

METER DRIVE)

 

 

 

 

 

 

 

 

SIG

(TO CH 2 METER DRIVE)

 

TOROIDAL POWER

TRANSFORMER

 

 

THERMAL

PROTECT

 

FREQ

 

 

CD EQ

ON

OFF

 

FREQ

 

CD EQ

ON

OFF

POWER

SWITCH

 

LAMP

TO CH 1 AND CH 2

MUTE

 

FREQ

 

 

LOW CUT

FILTER

 

 

FREQ

 

LOW CUT

FILTER

 

INTERNAL

FUSE

 

 

 

 

CH 1 BALANCED LINE INPUT (XLR-F)

THRU (XLR-M)

CH 1 BALANCED LINE INPUT (TRS)

CH 2 BALANCED LINE INPUT (XLR-F)

THRU (XLR-M)

CH 2 BALANCED LINE INPUT (TRS)

MACKIE DESIGNS M•1200/M•1400 BLOCK DIAGRAM (#011497DF)

 

 

FULL SYMMETRY DUAL DIFFERENTIAL

HIGH CURRENT DESIGN

 

PROFESSIONAL POWER AMPLIFIER

CH

GAIN/dB

GAIN/dB

CH

CH

CH

1

 

 

2

1

2

 

 

 

ON

 

 

 

 

 

OFF

 

 

 

 

 

POWER

19.00" (48.3cm)

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 appearing 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 frequency of the filter at either 63Hz or 125Hz, and the amplifier 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-

3.50" (8.9cm)

2U

 

 

 

4