background image

M•1200/M•1400

OWNER’S MANUAL

OL

–3

–6

–9

–2

0

–3

–6

–9

–2

0

SIG

OL

SIG

CH

1

30

28

26

20

22

18

24

16

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

24

16

14

8

0

0

1.23v (+4dBu)

SENSITIVITY

GAIN

/dB

3v

2v

1v

 PROFESSIONAL

 POWER

 AMPLIFIER

FULL S

Y

M

M

E

TR

Y

 DUAL D

IFFER

ENTIAL  

H

IG

H

 C

U

R

RE

NT D

E

SI

G

N

CHANNEL

2

1

CHANNEL

CH

1

CH

2

SPEAKER OUTPUTS

+

+

63Hz

125Hz

CONSTANT DIRECTIV

IT

Y

HORN EQ

/AIR EQ

CONSTANT DIRECTIV

IT

Y

HORN EQ

/AIR EQ

INPUT

THRU

THRU

INPUT

AMP MODE

FREQUENCY

4.5 k

 Hz

ON

5.6k Hz

2k Hz

MONO

BRIDGE

LIMITER 

(CH1 & CH2)

OFF

FULL  RANGE

SUB 

WOOFER

LOW CUT

FILTER

LOW CUT

FILTER

OUTPUT APPLICATION

SERIAL NUMBER

MANUF

A

CTURING D

A

TE

RISK O

F

 ELECTRIC SH

O

C

K

D

O

 NO

T O

PEN

REPLACE WITH THE SAME TYPE FUSE AND RA

TING.

DISCONNECT SUPPL

Y CORD BEFORE CHANGING FUSE

UTILISE UN FUSIBLE DE RECHANGE DE MÊME TY

PE.

DEBRANCHER A

VANT DE REMPLACER LE FUSIBLE

W

ARNIN

G: 

TO

 REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT 

EX

POSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. 

NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING T

O QUALIFIED PERSONNEL.

CAUTION

AVIS:

 RISCQUE DE CHOC 

ÉLECTRIQUE — NE P

AS OUVRIR

BALANCED

OR

UNBALANCED

BALANCED

OR

UNBALANCED

AIR EQ

MONO

BRIDGE

ON

/ BRIDGE

/ MONO

170 Hz

OFF

CONCEIVED, DESIGNED, AND MANUFACTURED 

BY MACKIE DESIGNS INC • WO

ODINVILLE • WA 

98072 • USA • MADE IN USA • 

PATENTS PENDING

4.5k Hz

5.6k Hz

2k Hz

AIR EQ

120 VAC 50/60 Hz 

1500 WATTS

+

170 Hz

100 Hz

OFF

STAGE

MONITOR

100 Hz

STAGE

MONITOR

OFF

TYPICAL

ON

OFF

TYPICAL

TYPICAL 35 Hz

TYPICAL 35 Hz

(MONO BRIDGE)

1200 W

A

TTS

4 OHM LOAD MIN.

600 W

A

TTS CH

2 OHMS LOAD MIN.

STEREO

TYPICAL

STEREO

TYPICAL

AIR EQ

AIR EQ

HIGH-CURRENT POWER AMPLIFIERS

Summary of Contents for M1200/M1400

Page 1: ...NOT OPEN REPLACE WITH THE SAME TYPE FUSE AND RATING DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE UTILISE UN FUSIBLE DE RECHANGE DE M ME TYPE DEBRANCHER AVANT DE REMPLACER LE FUSIBLE WARNING TO REDUCE...

Page 2: ...product does not appear to operate normally or exhibits a marked change in performance or E This Mackie product has been dropped or its chassis damaged 11 Servicing The user should not attempt to serv...

Page 3: ...n Our Fast Recovery design eliminates this high frequency sticking and allows the am plifier to remain stable when powering highly reactive loads at high volume levels You may wonder why a power amp e...

Page 4: ...K START I got ants in my pants and I got to dance INSTALLATION The M 1200 M 1400 amps can be mounted in any standard rack system see orplacedhorizon tally on a floor or table The heavier internal comp...

Page 5: ...cing but don t let the ants out of your pants Things You Must Remember Never plug amplifier outputs into anything except speakers unless you have an outboard box specifically designed to handle speake...

Page 6: ...like to use a calculator and read specifications You ll find it all here APPLICATION DIAGRAMS Mackie s gang of illustrators have created easy to understand diagrams of popular studio and live sound s...

Page 7: ...IONS AND CONSIDERATIONS 23 RACK MOUNTING 23 THERMAL CONSIDERATIONS 23 AC POWER CONSIDERATIONS 23 INPUT WIRING 24 OUTPUT WIRING 24 70V DISTRIBUTION SYSTEMS 25 APPENDIX A Service Info 26 TROUBLESHOOTING...

Page 8: ...PEAKER OUTPUTS 63Hz 125Hz CONSTANT DIRECTIVITY HORN EQ AIR EQ CONSTANT DIRECTIVITY HORN EQ AIR EQ INPUT THRU THRU INPUT AMP MODE FREQUENCY 4 5 k Hz ON 5 6k Hz 2k Hz MONO BRIDGE LIMITER CH1 CH2 OFF FUL...

Page 9: ...SOLE MONITOR OUT FROM MIXING CONSOLE MAIN OUT STAGE MONITOR 100Hz LIMITER ON CD OFF CD OFF M 1400 EIGHT MONITOR SPEAKERS CHANNEL 2 1 CHANNEL CH 1 CH 2 SPEAKER OUTPUTS 63Hz 125Hz CONSTANT DIRECTIVITY H...

Page 10: ...TING DEPENDS ON COMPRESSION DRIVER CD HORN COMBINATION 3 5KHz CD ON STEREO TYPICAL CD OFF CD OFF FROM ACTIVE CROSSOVER HIGH FREQUENCY L R FROM ACTIVE CROSSOVER LOW FREQUENCY L R 3 5KHz M 1200 M 1400 S...

Page 11: ...Constant Gain vs Constant Sensitivity There are two viewpoints or philosophies regarding the gain structure of power amplifi ers constant gain and constant sensitivity Constant gain means that regard...

Page 12: ...ks better It s a fact of physics that as the gain of the amplifier increases the circuit noise is amplified and increases too By main taining a constant gain the noise spec for an 800W amplifier can l...

Page 13: ...e either a shorted speaker cable or too many speaker cabinets connected to the amplifier i e the load impedance is too low If a short is indicated please check your cables If the cabling is OK then re...

Page 14: ...el be sure the load isn t adding up to less than 2 ohms Anything below 2 ohms can cause the SHORT LED to light and trig ger the PROTECT mode Remember As the load gets heavier its value in ohms goes do...

Page 15: ...minated Unscrew the amp s binding posts enough to reveal the holes on their sides then insert your stripped wires stripped about 3 8 back into the holes and retighten the posts finger tight is fine pl...

Page 16: ...on of the woofer But some woofers are built with reverse polarity meaning that the above conditions result in an inward excursion If you re not sure which type of speakers you have take a look at thei...

Page 17: ...ONITOR OFF TYPICAL ON OFF TYPICAL TYPICAL 35 Hz TYPICAL 35 Hz STEREO TYPICAL STEREO TYPICAL AIR EQ AIR EQ 2 2 3 1 1 SHIELD COLD HOT SHIELD COLD HOT 3 SHIELD COLD HOT 3 2 1 SLEEVE SHIELD TIP SLEEVE TIP...

Page 18: ...er second like 40Hz 300Hz The 40Hz refers to the low frequency point usu ally but not always where the speaker s output drops by 3 dB and will roll off com pletely as the frequency goes down There is...

Page 19: ...ATION BALANCED OR UNBALANCED BALANCED OR UNBALANCED AIR EQ ON BRIDGE MONO 170 Hz OFF 4 5k Hz 5 6k Hz 2k Hz AIR EQ 170 Hz 100 Hz OFF STAGE MONITOR 100 Hz STAGE MONITOR OFF TYPICAL ON OFF TYPICAL TYPICA...

Page 20: ...lso popular for subwoofer applications but please see SUBWOOFER foraspecialsubwoofersurprise To use all the M 1200 M 1400 s power to drive one speaker cabinet using BRIDGE mode you ll have to do four...

Page 21: ...E it will sum the inputs when the OUTPUT APPLICATION switch is set to SUBWOOFER Here s how to configure it 1 Turn the M 1200 M 1400 s POWER off 2 Set the OUTPUT APPLICATION switch to SUBWOOFER 3 Selec...

Page 22: ...INPUT of the amplifier and monitor the SPEAKER OUTPUT with the voltmeter or o scope 2 Adjust the signal generator level so you measure 1V rms output at 1kHz You should turn down the GAIN knobs on the...

Page 23: ...r festival THERMAL CONSIDERATIONS The M 1200 M 1400 amps are fan cooled and bring air in through the front and out through the sides Make sure that cool air is available at the front of the amplifier...

Page 24: ...d power the audio equipment from the other leg This will help minimize noise from the lights coupling into the audio particularly if SCRs are used When setting up for a show oftentimes you are pluggin...

Page 25: ...becomes 6 4W and a 10W tap becomes 12 8W M 1400 K 850W 625W 1 32 Thus a 2 5W tap becomes 3 3W a 5W tap becomes 6 6W and a 10 W tap becomes 13 2W CAUTION Acharacteristicoftappedtransform ersis that th...

Page 26: ...ble connections You may have your positive and negative connections reversed at one end of one speaker cable WARRANTY SERVICE Details concerning Warranty Service are spelled out on the Warranty Card i...

Page 27: ...in the amplifier Refer to Grounding in Appendix D REPAIR Service for the U S versions of our amplifi ers is available only from one of our authorized domestic service stations or at the factory lo ca...

Page 28: ...ny of the audio and electronic terms used in discussions of sound mixing and recording Many of the terms have other meanings or nu ances or very rigorous technical definitions which we have sidesteppe...

Page 29: ...l path as a result of an external magnetic field In audio systems this is usually manifested as a 60Hz or 120Hz hum or buzz The source of this noise can be from a ground loop or from the signal wire c...

Page 30: ...es to keep equipment chassis and controls at zero voltage and to provide a safe path for errant currents This is called a safety ground Maintaining a good safety ground is always essential to prevent...

Page 31: ...ers or monitor headphones or in the ear monitors are those speakers used by the per formers to hear themselves Monitor speakers are also called foldback speakers In recording the monitor speakers are...

Page 32: ...taken to simply mean two channels sweep EQ An equalizer that allows you to sweep or continuously vary the affected frequency of one or more sections TRS Acronym for Tip Ring Sleeve a scheme for connec...

Page 33: ...balanced end When connecting an unbalanced output to a balanced input be sure that the signal high hot connections are wired to each XLR CONNECTORS Mackie amplifiers use 3 pin female XLR connectors o...

Page 34: ...installations you can use bare wire Figure D or wire ter minated with spade lugs Figure E SPEAKONS Speakon connectors have become popular with many loudspeaker manufacturers be cause they provide a qu...

Page 35: ...fer increased immunity to external noise specifically hum and buzz Because a balanced system is able to minimize noise it is the preferred interconnect method especially in cases where very long lengt...

Page 36: ...he shelf connecting cables that are available at any music store Here are some guidelines 1 Use balanced lines if at all possible They provide better immunity to induced noise and ground loops Remembe...

Page 37: ...nominal level indi cation next to the control Again this should be at least 10 dB below the maximum output level of the mixer You can double check the actual output signal level if there is an output...

Page 38: ...the speaker s Often the passive crossover is built into the cabinet along with the various drivers The crossover divides the high level speaker signal into frequency bands which are then directed to...

Page 39: ...OHMS LOADS AND SUCH Remember As the load gets heavier its value in ohms goes down For instance a 2 ohm speaker load is twice as heavy as a 4 ohm load An ohm is a unit of resistance the more ohms the m...

Page 40: ...power re quires a steady and stable AC supply This means the line impedance must be very low to insure that the peak AC line voltage does not sag to less than 97 of its value If driving highly reacti...

Page 41: ...with musical program fully loaded 2 ohms per side or 4 ohms bridged 550 watts with musical program fully loaded 4 ohms per side or 8 ohms bridged 850 watts at full power into 8 ohms continuous sine w...

Page 42: ...R 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 S...

Page 43: ...torious Technical Writing staff then converted to this amazing piece of work using a 13 story 1000 gigawhat Macintosh powered by its own dedicated AC supply with extensive voltage regulation and noise...

Reviews: