Bluetooth 5.0 Audio Power Amplifier AK-380 400W+400W 2.0 CH HiFi Stereo Amp Receiver with USB,SD,AUX,FM Antenna for Car Home Speaker Bar Party-(Without Power Adapter)
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AI Verdict
This is a low-cost, low-power amplifier for small DIY projects or a secondary setup, not for anyone seeking genuine HiFi sound or high volume.
This amp is a fit only for specific, low-demand uses. The misleading power specs, missing power supply, and potential for noise make it a poor choice for a main audio system, but its low price and versatile inputs make it viable for hobbyists or secondary setups with appropriate speakers.
If you need to power anything other than small bookshelf speakers, look for an amplifier that lists 'RMS' power and includes a power supply rated for at least 12V and 5A.
Regret Score™
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Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Multiple inputs for the price: Bluetooth 5.0, USB, SD card, AUX, and FM radio.
- Independent bass and treble control knobs allow for basic sound adjustment.
- Very compact and lightweight at only 14.9 ounces, making it easy to place anywhere.
- Bluetooth connection is reportedly stable with no audible pop when pairing.
Cons
- Extremely misleading power rating; it's 40W+40W rated, not the advertised 400W+400W peak.
- Does not include the required 12V power adapter, which is a necessary separate purchase.
- Users report a noticeable background hiss or hum, especially with no audio playing.
- The low-frequency bass response is noticeably weaker compared to other amplifiers.
Dimension Scores
It produces sound, but reviews frequently mention a weak bass response and audible background noise.
The true 40W+40W rated power is low, and tests show a significant drop-off in low-frequency (bass) output.
For its price, the inclusion of Bluetooth 5.0, USB, SD, AUX, and FM radio is quite comprehensive.
The aluminum body is lightweight and compact, but the knobs and included remote feel cheap to many users.
Best For
- Powering small, efficient bookshelf speakers on a desktop.
- A simple audio system for a garage or workshop.
- DIY audio projects where space and cost are the main concerns.
- Adding Bluetooth and remote control to an old pair of passive speakers.
Not Recommended For
- Driving large floor-standing speakers or speakers that require significant power.
- Critical audio listening where sound purity and a low noise floor are important.
- Users who want a simple plug-and-play solution without buying extra parts.
Watch Out For
- The '400W+400W' is a fantasy marketing number; real-world output is 40W per channel, which is enough for modest volumes but not for parties.
- You must buy a 12V power supply separately. Users recommend one that is at least 3A to 5A for it to work properly.
- Some units exhibit a persistent electronic hiss or hum that can be audible during quiet passages or between tracks.
- The unit can get very warm during operation, so it needs to be placed in a spot with adequate ventilation.
- The speaker terminals are small spring clips, which won't accept thicker gauge speaker wire or standard banana plugs.
Full Specifications
| ASIN | B0C5MSSF3D |
| Item Weight | 14.9 ounces |
| Manufacturer | DideaECO |
| Item model number | AK-380-02 |
| Package Dimensions | 6.46 x 5.28 x 2.13 inches |
What Buyers Say
The most important thing to know about the AK-380 is that the '800-watt' power claim is pure fiction; its actual output is a much more modest 40 watts per channel. Once you get past that, what you have is a super-cheap, feature-packed little box for non-critical listening. It's a popular choice for DIY projects or for adding sound to a workshop. The Bluetooth 5.0, SD card slot, and FM radio all work, but don't be surprised by a background hiss. Also, remember to budget for a 12V power adapter, because it doesn't come with one.
“honestly for the price its fine, it makes my old desktop speakers play music from my phone and thats all i wanted, just dont believe the 800 watt nonsense lol.”
Common Praise
- Bluetooth connects quickly and maintains a stable connection.
- The small, lightweight design is perfect for desktops or small shelves.
- It's powerful enough to drive small bookshelf or garage speakers to a decent volume.
- Having separate bass and treble controls is a great feature at this rock-bottom price point.
Common Complaints
- The advertised 400W+400W power rating is completely false and misleading.
- A constant hiss or hum is audible, especially when no music is playing.
- The remote control is flimsy and has a very limited effective range.
- It doesn't come with the necessary 12V power supply, which is an annoying hidden cost.
- The case gets surprisingly warm to the touch after being on for a while.
Ownership Tips
- The bright blue LCD display is always on and cannot be dimmed, which can be distracting in a dark room.
- If you unplug the unit, it will not remember your last-used FM station, forcing you to scan for it again.
- The unit defaults to a loud announcement voice when switching modes, which can be startling.
- For the cleanest sound, users suggest keeping the volume on the amp turned up and controlling the final volume from your source device (like a phone).
Frequently Asked Questions
What kind of power supply do I need for this?
You need to purchase a 12V DC power supply separately. For best performance, look for one rated at 3A to 5A.
Is this really an 800W amplifier?
No. The 400W+400W rating is for peak power, which is a misleading marketing figure. The actual continuous (rated) power is 40W+40W.
Can I use banana plugs for my speakers?
No, the AK-380 uses small spring-clip terminals that only accept bare speaker wire.
Does it have a humming or hissing sound?
Some users report a noticeable hiss or hum, which is a common issue with inexpensive amplifiers of this type.
How good is the FM radio reception?
It includes an FM antenna and can work, but reception quality is mixed and depends heavily on your location and antenna placement.
Does it remember the last input (like Bluetooth) when you turn it back on?
User reviews suggest it often defaults back to another mode like Line-In or FM upon startup, requiring you to manually re-select your desired input.
Buying Guide
When you're shopping for these tiny, ultra-budget amplifiers, ignore the giant wattage numbers on the front. That's 'peak power,' a meaningless marketing term. You need to find the 'rated' or 'RMS' power, which is the real continuous output. Also, check if a power supply is included. Many, like this one, require you to buy a 12V adapter separately, so factor that into your total cost.
Wattage (Rated vs. Peak)
Peak power (like the 400W here) is a useless number the amp can only hit for a millisecond. Rated/RMS power (40W here) is what it can actually deliver continuously. This determines how loud it can get without distorting, and 40W is enough for a desk or small room, not a block party.
Inputs (Bluetooth, AUX, USB)
This determines how you can play your music. Bluetooth is for wireless streaming from your phone. AUX is a standard wired connection for TVs or computers. USB/SD lets you play music files directly from a flash drive, which is handy if you don't want to tie up your phone.
Power Supply (Not Included)
This amplifier is basically a paperweight without a power supply. You have to provide your own 12V DC adapter. Using an underpowered one can cause the amp to cut out or sound bad, so you need to find one that can supply at least 3 to 5 amps.
Alternatives
If this isn't powerful enough, search for a 'Class D mini amplifier' that explicitly states 'RMS power per channel' and shows a picture of an included power brick, preferably one rated for 19V or 24V for more headroom.
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