Cloud MA40 40W Compact Mono Mixer Amplifier

The Cloud MA40 is a compact 40-watt mono mixer amplifier designed for professional audio installations where space is limited and dependable operation is essential. Combining two stereo line inputs, a balanced microphone input, selectable audio priorities, and remote level control capability, the MA40 provides a practical solution for background music, paging, and localized sound reinforcement.

Designed for Cloud's “install-and-forget” applications, the MA40 is small enough to be installed in suitable wall or ceiling cavities, equipment cabinets, or near projectors, displays, and loudspeakers. Its compact enclosure makes it particularly useful for museums, art galleries, digital signage systems, visitor attractions, small retail spaces, and other commercial AV installations where a conventional rack-mounted amplifier may be impractical.

The MA40 delivers up to 40 watts into a 4-ohm speaker load when powered by an appropriate DC supply. Its two stereo line inputs are summed to mono, allowing compatible media players and other stereo sources to be connected without requiring an external mixer. A separate electronically balanced microphone input supports paging and announcements, with selectable +12V phantom power for compatible microphones.

Configurable microphone-over-music and Line 1-over-Line 2 priority functions allow the amplifier to automatically favor designated sources. An external music mute input provides additional integration with compatible building control systems, while an optional Cloud remote level controller allows convenient volume adjustment from another location.

With its convection-cooled design, automatic power-down capability, and built-in amplifier protection, the Cloud MA40 is well suited for compact commercial sound systems requiring reliable everyday performance.

Features & Benefits

Compact 40W Amplification for Small Commercial Spaces

The Cloud MA40 provides up to 40 watts of mono amplification into a 4-ohm speaker load.

Its small footprint makes it useful for localized audio applications where installing a full-size amplifier rack is unnecessary.

Maximum output power depends on the DC supply voltage, with the full rated output requiring a suitable supply above 18V DC.

Two Stereo Line Inputs Summed to Mono

Two unbalanced stereo line inputs allow the MA40 to accept audio from compatible music players, media devices, and other line-level sources.

The stereo signals are combined internally for mono reproduction, simplifying installations that use a single speaker or a mono speaker system.

Individual input gain adjustments help balance source levels during installation.

Balanced Microphone Input with Phantom Power

The MA40 includes an electronically balanced microphone input with adjustable gain.

Selectable +12V phantom power supports compatible condenser microphones, making the amplifier suitable for paging and announcement applications.

Independent microphone and music level controls allow straightforward adjustment of the audio mix.

Configurable Microphone and Music Priority

The MA40 supports selectable microphone-over-line priority and Line 1-over-Line 2 priority.

These functions allow a designated microphone or line-level source to take precedence over background music when activated.

This is especially useful for visitor announcements, informational messages, and automated audio playback.

Remote Music Level Control

A dedicated remote level control port supports compatible Cloud RL Series wall controllers.

This allows staff to adjust music volume from a convenient location without accessing the amplifier itself.

Adjustable Music and Microphone Equalization

Low- and high-frequency equalization adjustments help installers tailor the sound to the connected loudspeakers and acoustic environment.

The MA40 also supports optional EQ cards for compatible installation loudspeakers, providing additional system optimization options.

External Music Mute Interface

An external music mute input supports normally open or normally closed control configurations.

This allows the MA40 to respond to compatible building control or alarm interfaces by muting music when required.

The mute function alone does not establish compliance with emergency voice evacuation system requirements.

Automatic Power-Down for Energy Savings

The user-selectable automatic power-down function reduces power consumption when the amplifier is inactive.

With less than 1 watt of consumption in its specified sleep mode, the MA40 is suitable for installations where energy efficiency and unattended operation are important.

Silent Convection Cooling

The MA40 uses convection cooling rather than a fan, eliminating mechanical fan noise.

This makes it suitable for quiet environments such as galleries, museums, offices, and presentation spaces.

Protected Amplifier Output

The amplifier incorporates protection against overcurrent, DC offset, and thermal faults.

A switch-on delay helps reduce unwanted startup transients at the connected loudspeaker.

Key Features

• Compact 40W mono mixer amplifier
• Up to 40W output into a 4-ohm load with suitable DC power
• Designed for discreet “install-and-forget” commercial installations
• Two unbalanced stereo line inputs, internally summed to mono
• Individual line input gain adjustments
• Electronically balanced microphone input
• Adjustable microphone gain from 10 to 50 dB
• Selectable +12V microphone phantom power
• Separate microphone and music level controls
• Configurable microphone-over-line priority
• Selectable Line 1-over-Line 2 priority
• Low- and high-frequency EQ adjustments
• Support for compatible optional loudspeaker EQ cards
• Remote level control port for compatible Cloud RL Series plates
• External music mute input with normally open or normally closed selection
• User-selectable automatic power-down
• Less than 1W consumption in specified sleep mode
• Silent convection-cooled operation
• Amplifier protection against overcurrent, DC offset, and thermal faults
• Operates from 12–24V DC
• Universal AC power adapter included

Applications

Museums and Art Galleries

Provide clear narration, background music, and localized audio for exhibits and installations without occupying valuable floor space.

Digital Signage and Display Systems

Amplify audio from media players, information displays, and promotional systems in retail and commercial environments.

Visitor Attractions and Guided Exhibits

Support spoken information, recorded presentations, and background audio for visitor experiences.

Small Retail Stores

Deliver music and paging audio in compact stores, reception areas, and demonstration spaces.

Offices and Meeting Rooms

Combine music playback and microphone announcements with convenient remote volume adjustment.

Transportation and Mobile Installations

Support suitable low-voltage audio installations in vehicles or other mobile environments when the power supply and mounting conditions meet the manufacturer's requirements.

Cloud MA40 Technical Specifications

Specification	Details
Manufacturer	Cloud Electronics
Model	MA40
Product Type	Compact Mono Mixer Amplifier
Maximum Rated Output	40W into 4 ohms
Full-Power DC Requirement	Suitable DC input above 18V
Line Inputs	2 unbalanced stereo, summed to mono
Line Frequency Response	20 Hz – 20 kHz, ±1 dB
Line Distortion	Less than 0.1%
Line Input Sensitivity	−12 dBu to +8 dBu
Line Input Gain Range	20 dB
Line Input Impedance	10 kΩ, unbalanced
Line Headroom	Greater than 12 dB
Line Noise	Less than −90 dB
Line Low-Frequency EQ	±10 dB at 50 Hz
Line High-Frequency EQ	±10 dB at 10 kHz
Microphone Input	Electronically balanced
Microphone Frequency Response	120 Hz (−3 dB) to 20 kHz
Microphone Distortion	Less than 0.1%
Microphone Gain Range	10–50 dB
Microphone Input Impedance	Greater than 2 kΩ, balanced
Microphone Headroom	Greater than 12 dB
Microphone Noise	Less than −90 dB
Microphone Phantom Power	+12V, selectable via internal jumper
Input Priority	Microphone-over-line and Line 1-over-Line 2
Remote Level Control	Compatible Cloud RL Series controllers
Music Mute	External N/O or N/C selectable input
Automatic Power-Down	User-selectable
Sleep-Mode Consumption	Less than 1W
DC Power Requirements	12–24V DC
Power Consumption	Approximately 47W
Included Power Supply	Universal 100–240V AC adapter
Cooling	Convection, fanless
Protection	Overcurrent, DC offset, and thermal protection

Installation and Compatibility

The Cloud MA40 is designed for low-impedance loudspeaker systems using compatible audio sources and microphones.

Its amplified output delivers up to 40W into a 4-ohm speaker load when supplied with the appropriate DC voltage. The total speaker impedance and amplifier power requirements should be verified before installation.

Compatible Cloud RL Series remote control plates can provide convenient volume adjustment from another location.

The MA40 also supports optional loudspeaker EQ cards for applications requiring additional speaker-specific equalization.

Unlike the Cloud MA40F, the standard MA40 does not provide a Facility Port or a dedicated 70V/100V distributed speaker line input.

The amplifier should be mounted in a suitable location with adequate ventilation and access for service, following the manufacturer's installation requirements.

Why Buy the Cloud MA40 from Audio Supply?

Audio Supply offers professional Cloud Electronics amplifiers and commercial audio equipment for installed sound systems. The MA40 provides compact, dependable amplification with flexible music and microphone controls for applications where space-saving installation and straightforward operation are essential.