When connecting a balanced signal using the XLR or 1/4" jacks, they’re wired thusly, per AES (Audio Engineering Society) standards:

 

XLR

TRS

Hot (+)

Pin 2

Tip

 

Cold (–)

Pin 3

Ring

Shield (Ground)

Pin 1

Shield

 

SHIELD

2

 

 

HOT

 

 

COLD

3

1

 

SHIELD

1

 

 

COLD 3

2

 

 

HOT

 

 

 

1

 

SHIELD

 

3

 

COLD

 

2

 

HOT

 

 

 

Balanced XLR Connectors

 

 

 

RING SLEEVE SLEEVE

RING

TIP

TIP

RING (COLD)

TIP (HOT)

SLEEVE (SHIELD)

Balanced 14" TRS Plugs

Unbalanced TS (tip-sleeve) lines can be ac- commodated via the TRS jack. Make sure the cord terminates with a TS plug (like a guitar plug), or if it’s a TRS plug (like a headphone plug), make sure the ring is tied to the shield, preferably at the source.

SLEEVE

SLEEVE

TIP

TIP

RING (COLD)

TIP (HOT)

SLEEVE (SHIELD)

Unbalanced 1/4" TS plug

You can connect an unbalanced XLR cable to the M•1200/M•1400, although this would be unusual — as unusual as an unbalanced XLR output. However, if you have an unbalanced XLR connection to make, refer to the “Connec- tors” section (Appendix C) at the back of this manual for more information.

The M•1200/M•1400 amps expect to see a nominal signal level anywhere between the –10dBV “semipro” and +4 dBu “pro” standards, meaning almost any line-level mixer or other device can be plugged into the amp’s INPUTs. Use the GAIN controls to adjust the gain of the amplifier to match the signal level you’re using.

If you set the AMP MODE switch in MONO or BRIDGE, use the CHAN- NEL 1 inputs only — the CHANNEL 2 inputs are disabled in this case.

1CHANNEL / BRIDGE / MONO

LOW CUT

INPUT

FILTER

 

TYPICAL

BALANCED

OR

35 Hz

UNBALANCED

 

STAGE

 

MONITOR

AMP MODE

STEREO

MONO

 

BRIDGE

TYPICAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INPUT

BALANCED

OR

UNBALANCED

CHANNEL 2

LOW CUT

FILTER

TYPICAL

35 Hz

STAGE

MONITOR

100 Hz

OUTPUT APPLICATION

100 Hz

OFF

170 Hz

 

FULL

 

SUB

 

OFF

170 Hz

 

 

 

RANGE

 

WOOFER

 

 

 

 

CONSTANT DIRECTIVITY

LIMITER (CH1 & CH2)

FREQUENCY

 

CONSTANT DIRECTIVITY

 

HORN EQ/AIR EQ

 

 

 

 

HORN EQ/AIR EQ

 

 

 

STEREO

 

 

 

 

4.5 kHz

 

 

125Hz

 

4.5k Hz

ON

TYPICAL

 

ON

 

 

 

 

 

2k Hz

5.6k Hz

 

ON

OFF

63Hz

 

2k Hz

5.6k Hz

 

AIR EQ

OFF

 

 

 

OFF

 

AIR EQ

 

 

TYPICAL

 

 

 

TYPICAL

 

 

 

 

THRU

 

 

THRU

 

 

17

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Image 17
Mackie M1200/M1400 owner manual Hot + Pin, Cold Pin Ring, Pin Shield

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.