Mackie M1200/M1400 owner manual Temp Status, Power

Page 14

Note: When using the amplifier in BRIDGE mode, one or both SHORT LEDs may light under shorted or low impedance conditions. Regardless of whether one or both LEDs light, it’s an indication of a problem that requires further investigation.

TEMP STATUS

TEMP (short for temperature) is another feature designed to keep your mind at ease. Normally the COLD LED is lit, indicating that the M•1200/M•1400 is working normally. Under extreme conditions the amplifier may overheat. You may ask, “What kind of extreme conditions?”

Overheating problems are usually caused by one of the following situations: improper venti- lation, high ambient temperatures, overdriving the amplifier into clipping, driving the ampli- fier hard into low impedance loads, frayed or partially shorted speaker cables, or defective or internally shorted speakers.

The heaviest load the M•1200/M•1400 can tolerate is 2 ohms per channel (4 ohms in bridged mode). If you’ve got a set of speakers wired in parallel, 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 down. For instance, a

2-ohm speaker load is twice

as “heavy” as a 4-ohm load. Please see “Do The Math: Ohms, Loads and Such” in Appendix E to learn about speaker loads.

As the internal temperature of the amplifier rises, the fan kicks into high speed. This occurs at 60°C (140°F). More air moves through the

constant temperature gradient cooling tunnel to remove additional heat from the output transistors. However, if the internal tempera- ture of the amplifier should exceed 80°C

(176°F), the COLD LED turns off, the HOT LED turns on, and both PROTECT LEDs shine. The output of the amplifier is muted — at this point the amplifier is in Standby mode and remains there until the internal temperature cools off to a safe level (55°C or 131°F). When this occurs, the HOT LED and PROTECT LEDs turn off, the COLD LED turns on and normal operation resumes.

Be Aware: If the HOT LED

comes on frequently, some-

thing is overworking the

M•1200/M•1400 or it’s not properly ventilated. Look

at each of the “extreme conditions” described above and try to determine what is causing the amplifier to overheat. Refer to the “Trouble- shooting” section in Appendix A for more help.

What’s that? Why doesn’t the

fan just go fast all the time?

Well, if it did, you might actu-

ally hear it whirring during your quiet moments (there are quiet moments in your life, aren’t there?).

While this whirring would be of no concern in most live-sound situations, it could become annoying in a control room environment. So, when the M•1200/M•1400 is not working hard, the fan goes slow; when the music gets loud and puts the amp to work, the fan goes fast.

POWER

To make the amp operate, push the top half of the POWER switch. It clicks into place and a

(MONO BRIDGE)

1200 WATTS

4 OHM LOAD MIN.

600 WATTS CH

2 OHMS LOAD MIN.

120 VAC 50/60 Hz 1500 WATTS

CAUTION

 

 

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT

SERIAL NUMBER

MANUFACTURING DATE

 

 

 

 

 

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

 

 

RISK OF ELECTRIC SHOCK

NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

 

 

DO NOT OPEN

 

 

AVIS: RISCQUE DE CHOC ÉLECTRIQUE — NE PAS OUVRIR

 

 

 

 

 

 

 

 

 

REPLACE WITH THE SAME TYPE FUSE AND RATING.

 

 

UTILISE UN FUSIBLE DE RECHANGE DE MÊME TYPE.

 

 

DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE

 

 

DEBRANCHER AVANT DE REMPLACER LE FUSIBLE

 

 

 

 

 

MONO

 

 

 

 

 

CONCEIVED, DESIGNED, AND MANUFACTURED

 

 

 

BRIDGE

 

 

 

 

 

+

 

 

–

 

BY MACKIE DESIGNS INC • WOODINVILLE • WA

CH

 

 

 

 

CH

98072 • USA • MADE IN USA • PATENTS PENDING

 

 

 

 

 

 

1 2

++

– –

SPEAKER OUTPUTS

M•1200 Rear Panel

14

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Contents Speaker Outputs Safety Instructions To suffi Protectors Ciently Noise level exposures shown in this chartManent hearing loss While thisM1200/M1400 Amps can be mounted Be sure the Power switch is off before making connectionsQuick Start M1200/M1400 ampsThings You Must Remember 1/4 TS connectors are wired Tip = hot + and sleeve = coldStart dancing, but don’t let the ants out of your pants General Precautions Considerations Application DiagramsPlug for the Connectors Section Arcane Mysteries IlluminatedContents Application M1400 Main Speakers and Stage Monitors with ONE Amplifier M1200/M1400 Stereo System with Bridged Subwoofer Gain DB for those of you sittin’ there with your calculatorMeters High Current DesignShort SIGProtect Outputs. Both the Protect and the Short LEDs light upPower Temp StatusSpeaker Outputs Power CordFiers first. When powering If you shut down your System, turn off your ampliBe Aware Should you An amp’s signal routingInput Choose to terminate your Speaker cables withPin Shield Hot + PinCold Pin Ring Constant Directivity ThruLOW CUT Filter AMP Mode More on Constant Directivity HornsLimiter BridgeOutput Application NEL 1 inputs onlySubwoofer Here’s how to configure it Turn the M1200/M1400’s Power offTurn the M1200/M1400’s Power on. Woof Select a rolloff point, via the FrequencySubwoofer Frequency switch setting either 63Hz or 125Hz Thermal Considerations AC Power ConsiderationsRack Mounting AC Power Distribution Input WiringOutput Wiring FeetLoad Gauge Impedance Wire70V Distribution Systems Make sure the AMP Mode switch is set to Bridge Warranty ServiceTroubleshooting Are both Gain knobs set to the same position?Wood-Red Rd. NE Woodinville, WA RepairMackie Designs Sound Pressure Level SPL measured with an a weighting filter Term for a sound mixer, usually a large desk-like mixerEMI Frequency See HertzControl affecting the final output of a Signal whose level falls between -10 dBu and +30 dBuMale counterpart to the phone jack. See above TRS Unity gainUnbalancing a Line XLR Connectors⁄4 TS Phone Plugs and Jacks InstrumentsSpeakons Binding PostsBalanced lines offer increased immunity Balanced LinesBalanced line is a three Optimizing Sound System Levels GroundingHere are some guidelines Don’t use hardware-store light dimmersNext set the master output level fader Dynamic RangeBiamplified System with Active Crossover Ohm speaker load is twice as heavy as a Do the Math OHMS, Loads and SuchAs a load gets heavier, its impedance in ohms decreases Specifications AC Line Power IndicatorsPower Consumption Limiter SectionFreq Colophon Mackie Designs Inc All Rights Reserved

M1200/M1400 specifications

The Mackie M1200 and M1400 are two prominent power amplifiers that have gained recognition for their reliability, performance, and innovative design in the professional audio field. Engineered for both live sound and studio applications, these amplifiers deliver exceptional sound quality and unmatched power, making them a favorite among audio professionals.

One of the standout features of the M1200 and M1400 is their impressive power output. The M1200 boasts a power output of 1200 watts at 4 ohms, while the M1400 takes it a step further with 1400 watts at 4 ohms. This substantial power allows users to drive a wide range of speakers, making them suitable for various settings, from small clubs to large venues and outdoor events. Furthermore, they excel in providing clean, distortion-free sound even at high volumes.

Both models incorporate Mackie's patented Smart Protect DSP technology. This intelligent thermal and signal protection system helps prevent overheating and ensures that the amplifiers operate within safe limits, enhancing longevity and reliability. The DSP also contributes to superior sound quality, maintaining clarity and detail across different frequency ranges.

Another key feature of the M1200 and M1400 is their rugged construction. Designed for the rigors of touring and live performances, these amplifiers feature a sturdy chassis that withstands the challenges of transport and heavy use. Their efficient heatsink design allows for effective cooling, ensuring the amplifiers remain operational even under demanding conditions.

In terms of connectivity, both models are versatile. They offer XLR and TRS inputs, allowing compatibility with a variety of audio sources. The outputs include Neutrik Speakon connections, providing secure and reliable speaker connections. Additionally, the amplifiers have built-in limiters that help to prevent speaker damage by controlling signal levels.

The user-friendly interface of the M1200 and M1400 includes level control knobs, LED indicators for power and signal, and a comprehensive set of output options. This simplicity ensures that audio engineers can quickly adjust settings to cater to specific acoustic environments, making setup and operation seamless.

In conclusion, the Mackie M1200 and M1400 power amplifiers are remarkable for their powerful performance, durability, and advanced technology. Whether for live sound reinforcement or studio applications, these amplifiers continue to set a standard in audio excellence, proving their worth to sound engineers worldwide.
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