Extron electronic MPA 401-70V manual Remote Input Connector, Speaker Connections

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Remote Input Connector

ERemote input connector (see figure 2) — This 3-pole captive screw connector allows the option of using a wall‑mounted audio controller or MediaLink product to control volume and mute levels remotely.

Options for remote control include the Extron VC 50, VCM 100 AAP, VCM 100 MAAP, or MLA VC10. Third party 10k potentiometer volume controllers can also be connected to this port. See the notes on page 4 for important information about connecting wires to captive screw connectors.

Wire the remote control connector to the VCM 100 MAAP as shown in the figure at right and instructions below:

zz Pin 1 is 10 VDC reference voltage.

zz Pin 2 (VOL/MUTE) has two functions:

 

10 V

Volume Pot

2K

Vol/Mute

10K Ohms

Mute

 

 

Switch

 

GND

zz

zz

It can be used as a variable voltage input. The volume control DC voltage range is 0 to 10 V, with 0 V giving full attenuation and 10 V giving maximum volume.

It can be used for remote control muting. Sound is muted while the mute pin is shorted to ground.

zz Pin 3 is ground.

NOTE:

All nominal levels are at ± 10%

More information about remote control of these amplifiers can be found on page 9.

Speaker Connections

F Speaker connection (see figure 2) — Connect the speakers

OUTPUT

to this socket using the 2-pole, 5 mm screw-lock captive screw

 

 

 

 

 

 

 

 

 

 

 

 

connector (shown at right).

 

 

 

 

 

 

The three left channel inputs (RCA, TRS and captive screw)

are summed to form Left Sum, with weightings proportional to their respective sensitivities. Similarly the three right channel inputs are summed to form a Right Sum. Left Sum and Right Sum are mixed and amplified to provide one high voltage, mono output. The MPA 401‑70V provides up to 40 W for a 70 V line distributed sound system; the MPA 401‑100V provides up to 40 W for a 100 V line distributed sound system.

See the notes on page 4 for important information about connecting wires to captive screw connectors.

CAUTION: Do not short the + and - outputs to each other or to ground () as this will damage the amplifier.

MPA 401-70V and MPA 401-100V • Rear Panel and Cabling

6

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Contents MPA 401 Series Precautions Notational Conventions Used in this Guide Page Contents MPA 401-70V and MPA 401-100V Contents Introduction MPA 401-70V and MPA 401-100V DescriptionMPA 401-70V and MPA 401-100V Features Rear Panel Cabling Rear Panel CablingPower Input Connecting the EPS 1250 C Power Supply to the MPAPS 1230 Power Supply Audio InputsRemote Input Connector Speaker ConnectionsSetup Operation Front Panel FeaturesSetting Input Level Setting Bass and TrebleRemote Control Options Extron MPASpecifications AudioControl/remote amplifier Parts Accessories Included PartsOptional Accessories Plenum Placement Tabletop PlacementMounting Rack Mounting UL Guidelines For Rack MountingUnder-desk Mounting Through-desk MountingProjector Mounting Extron Warranty Extron USA West Extron USA East
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MPA 401-70V specifications

The Extron Electronics MPA 401-70V and MPA 401-100V are powerful, compact audio power amplifiers designed for efficient performance in a variety of professional audio applications. These amplifiers are specifically tailored for use in systems that require reliable, high-quality audio distribution in challenging environments, such as schools, corporate settings, and commercial spaces.

One of the standout features of the MPA 401 series is its versatility in supporting both 70V and 100V speaker systems. This functionality allows for easy integration into existing audio setups, accommodating different types of speakers and installation requirements. The MPA 401-70V and MPA 401-100V boast an output power rating of 40 watts per channel, providing ample power for driving multiple speakers while maintaining audio clarity and precision.

Another key technology employed in these amplifiers is their efficiency and thermal management, which are critical for long hours of operation. The MPA 401 series is designed with an advanced Class D output stage, ensuring high efficiency while minimizing heat generation. This not only leads to lower energy costs but also increases the reliability of the devices, ensuring consistent performance even in demanding conditions.

The MPA 401 amplifiers are equipped with comprehensive input options, including both balanced and unbalanced inputs to accommodate various audio sources. This flexibility makes it easy to connect microphones, mixers, and other audio sources, ensuring that users have the tools needed to create a seamless audio experience. Additionally, each amplifier includes a built-in high-pass filter, which can help optimize the sound when used with specific speaker types.

Including features such as fault protection, short circuit protection, and thermal protection, the MPA 401 amplifiers ensure both safety and longevity in operations. Their compact design makes them ideal for installation in tight spaces, while the rugged construction guarantees durability in any environment.

Furthermore, the amplifiers offer front-panel controls, providing users instant access for volume adjustments and signal monitoring. This simplicity of use enhances the overall user experience, allowing for quick adaptations and optimizations on the fly.

In summary, the Extron MPA 401-70V and MPA 401-100V are robust amplifiers designed to withstand various environmental challenges while delivering exceptional audio performance. Their combination of power, efficiency, and flexibility makes them an excellent choice for a broad range of professional audio applications.
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