other. The unbalanced ground (earth) connec- tion should be wired to the low and the ground connections of the balanced input. If there are ground-loop problems, try connecting the un- balanced ground connection only to the input low connection, and leaving the input ground connection disconnected.

In some cases, you will have to make up special adapters to interconnect your equip- ment. For example, you may need a balanced XLR female connected to an unbalanced 1⁄4" TS phone plug. The balanced-to-unbalanced connection has been anticipated in the wiring of Mackie jacks. A 1⁄4" TS plug inserted into a 1⁄4" TRS balanced input, for example, auto- matically unbalances the input and makes all the right connections. Conversely, a 1⁄4" TRS plug inserted into a 1⁄4" unbalanced input automatically ties the ring (low or cold) to ground (earth).

SPEAKONS

Speakon® connectors have become popular with many loudspeaker manufacturers be- cause they provide a quick, yet safe and secure method of connecting speaker cables. The M•1400 is outfitted with Speakon connectors (Figure G) instead of the 1/4" TS jacks pro- vided on the M•1200. Speakon connectors have a twist-locking mechanism that prevents them from being pulled out accidentally. Plus, they are capable of handling high currents, and meet IEC 65 and IEC 348 safety requirements. Pin 1+ is positive (+) and Pin 1– is negative (–).

CH

MONO

CH

+ BRIDGE

1

 

 

2

++

SPEAKER OUTPUTS

BINDING POSTS

Binding posts provide a number of different methods for connecting speaker wire to the outputs of the amplifier. For fixed installations, you can use bare wire (Figure D), or wire ter- minated with spade lugs (Figure E).

Figure D: Binding Posts with Bare Wire

Figure G: Speakon Connectors

1/4"

Figure E: Binding Posts with Spade Lug

For portable applications, the binding posts accept single or double banana plugs (Figure F). They provide a method of quickly connect- ing and disconnecting speaker cables to and from the amplifier. Double banana plugs have a tab on one side to indicate the ground (GND) side of the connector. This side connects to the black (–) binding post terminals on the amplifier.

G

N

D

 

 

 

Figure F: Binding Posts with Double Banana Plug

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Mackie M1200/M1400 owner manual Speakons, Binding Posts

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.