Cloud USA MA40 40W Mini Amplifier for Audio and AV Installations

Cloud USA MA40 40W Mini Amplifier for Audio and AV Installations

Cloud USA MA40 40W Mini Amplifier for Audio and AV Installations

B&H # CLMA40 MFR # MA40
Cloud USA MA40 40W Mini Amplifier for Audio and AV Installations

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Product Highlights

  • 40W Amp for AV & Audio Installations
  • Museums Exhibits, Transportation & More
  • Compact at 8.7 x 1.6 x 5.7"
  • 2 x Line Inputs & x 1 Mic Input
  • Internal Line Summing, Mono Operation
  • Screw Terminal Connections
  • Selectable Mic-over-Line Priority
  • Selectable Line 1-over-Line 2 Priority
  • Low- & High-Frequency EQ
  • Energy Efficient
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This item is noncancelable and nonreturnable.

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Cloud USA MA40 overview

  • 1Description

The Cloud MA40 is a mono amplifier for use in AV systems and installations with an audio component. At 8.7 x 1.6 x 5.7", it is compact enough to fit into a wall or ceiling mount, or to be placed conveniently next to projectors, displays, and loudspeakers. As such, it is suitable for gallery/museum exhibitions and tour-guide systems. It can also work with digital signage systems, providing a vast improvement over the audio typically found in such devices. The amplifier handles 40W into a 4-Ohm load, though it can also operate with 12 to 24 VDC power supplies, making the MA40 suitable for installations where an AC mains power supply isn’t on hand—places such as trams, river-boats, and buses.

The amplifier itself can mix a balanced microphone input with two unbalanced stereo connections, summing the stereo inputs to mono internally and outputting them via the music channel, leaving the microphone channel for the balanced mic input. A music mute input is also provided, which can be hooked into an emergency system and permits compliance with local Fire Authority regulations; when the music mute is instantiated, the microphone input remains active, and a front panel MUTE LED illuminates. The inputs and outputs provided are all plug-in screw terminal connections, and can be controlled via separately-available remotes.  

Rear-panel DIP switches allow you to set various priorities, such as Line 1 over Line 2, or Mic over Line. Configured in this way, you can connect message stores, or cause the music channel to automatically attenuate whenever microphone signal is present; this comes in handy for announcements. For microphones requiring 12V phantom power, an internal jumper is available.

On the front panel, you’ll note controls for Mic, Line 1, and Line 2 levels, as well as low-frequency and high-frequency controls for the music channel to better accommodate the acoustics of your given space. On the rear of the unit, you’ll see that the line inputs have a preset control for gain, while the mic input sports preset gain, low-frequency, and high-frequency EQ controls. An energy efficient amplifier, the MA40 features a user-selectable power-down function which automatically puts the unit into a low-current standby mode when it ceases to receive signal after a predetermined amount of time.

Key Features at a Glance
40W power amplifier

Compact module for install-and-forget situations

2 unbalanced stereo line inputs with individual sensitivity trims

Electronically-balanced mic input with separate gain control

Phantom power selectable by internal jumper

Front-panel control of music level and mic levels

Front-panel HF and LF EQ adjustments for music sources

Rear-panel HF and LF EQ adjustment for mic input

Selectable MIC-over-LINE priority

Selectable LINE 1-over-LINE 2 priority

Optional EQ cards available to suit various popular installation loudspeakers

Remote level control port; compatible with Cloud RL Series plates

Music mute input; selectable N/O or N/C

Automatic power-down function (user-selectable)

Less than 1W power consumption in sleep mode

Convection cooled

Silent in operation

PSU meets US DoE Level VI energy requirements

Operates from 100 to 240 VAC

Universal AC adapter included

In the Box
Cloud USA MA40 40W Mini Amplifier for Audio and AV Installations
  • Power Adapter
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description

    Cloud USA MA40 specs

    Line Inputs
    Frequency Response 20 Hz to 20 kHz at ±1 dB
    Distortion < 0.1 %
    Sensitivity -12 dBu to +8 dBu
    Input Gain Control 20 dB range
    Input Impedance 10 kOhms (unbalanced)
    Headroom > 12 dB
    Noise < -90 dB
    EQ Frequency Bands (Fixed) LF: ±10 dB at 50 Hz
    HF: ±10 dB at 10 kHz
    Microphone Inputs
    Frequency Response -3 dB at 120 Hz (filter) to 20 kHz ±1 dB
    Distortion < 0.1%
    Gain 10 to 50 dB
    Input Impedance > 2 kOhms (balanced)
    Headroom > 12 dB
    Noise < -90 dB
    Phantom Power +12 V (internal jumper)
    Output Power 40 W, DC input > 18 V (1 kHz continuous sine wave)
    I/O Screw terminal connections
    Power Input 12 to 24 VDC (External 24 Volts AC adapter supplied)
    Power Consumption 47 W
    PSU External, Universal-type, 100 to 240 VAC, 47 to 63 Hz
    Amplifier Protection Fixed level signal limiter; protection against DC, PSU overcurrent, amplifier overcurrent, over-temperature, supply voltage under/over-voltage; resettable internal breaker (no fuses).
    Dimensions (W x H x D) 8.7 x 1.6 x 5.7" / 22.0 x 4.1 x 14.5 cm
    Weight 26.5 oz / 750.0 g

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