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Description
Cloud USA MA40 40W Mini Amplifier for Audio and AV Installations40W 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 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
- 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
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
| 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 | |
|---|---|
| Output Power | 40 W, DC input > 18 V (1 kHz continuous sine wave) |
| General | |
|---|---|
| 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 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.8 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Stops Me From Picking and Actually Works
As a woman in my 40s, I never would have guessed I’d still need pimple patches, yet the occasional zit still pops up — and these things are like magic.
They work really well, blend into my fair/light skin nicely, and are barely noticeable at a quick glance. I’m also a terrible picker, and picking is so bad for your skin, so I love that these keep me from messing with pimples while doing all the work for me overnight. I’m always grossly fascinated by how much gunk they pull out by morning.
Very happy to have these in my little skincare emergency arsenal.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Camouflages well with the skin and sticks long enough
I was excited to try these Halo Dot patches because I was having some breakouts before a wedding I had to attend. I put these on three nights before the wedding only at nights and left them on until the morning. I washed my face the 1st night, yet the second night I did not and it still attached (mind that I have a very oily face by the end of the day).
With every application I saw good results as the breakouts were being reduced with each use. It is easy to put on and to carry out if you need to travel because it comes in two separate little envelope like package that you can put in a backpack/purse. These are thin and are almost not visible.
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Reviewed in the United States on May 14, 2026
★★★★★ 4
Easy to Use and Surprisingly Effective
Even though I am well past the age when I thought breakouts would stop happening, I still get the occasional pimple. As luck would have it, I felt one starting to pop up on my cheek the day after these Halo Dot Pimple Patches arrived.
Before bed, after washing and thoroughly drying my face, I applied one of the patches. It peeled easily from the backing sheet, and when I realized I had not placed it quite right, I was pleasantly surprised that I could lift and reposition it without any trouble.
What really impressed me was how well it blended into my skin. I was only wearing it overnight, but honestly, I do not think anyone would have noticed it unless they were looking very closely. In fact, I forgot I even had it on until I looked in the mirror the next morning.
The patch peeled off easily and had clearly pulled some of the buildup from the blemish overnight. There was no redness or irritation afterward, and the spot looked dramatically improved by morning.
The only downside for me is the price, especially since the package contains just 33 patches. That said, if they continue to work this well, I would definitely consider purchasing them again.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Love these already! Came in handy just when I need it!
These acne patches came in really handy when I had a random breakout near my lip, especially since that’s an area where I tend to wear a lot of makeup. They helped gently draw out impurities without being harsh on my skin.
I also like that they blend in well on the skin. They’re not tinted, but they still work nicely across different skin tones like advertised, which makes them less noticeable while wearing them.
You get a good amount in the package as well—33 patches total, with 18 patches on each sheet. Overall, they’re convenient to have on hand for unexpected breakouts, and I would definitely recommend them.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
One of the best dog toys I’ve found
Color: Blue, Color: Blue
My Great Dane puppy- at 140lbs, loves this!! We had another one that was plastic and it worked ok but this is so much better! Interactive, soft to play with, battery last a long time & he does not get bored with it.
Besides is plush lamb chops, best toy ever bought for him.
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Reviewed in the United States on May 25, 2026