2.1 Channel Bluetooth Audio Power Amplifier Board
$17.99
Price: $14.99 - $17.99
(as of Feb 26, 2025 18:46:11 UTC – Details)
Product Description
How to Select the Audio Input Mode
This amplifier board has two input modes: Bluetooth and 3.5mm AUX.
When both modes input audio signals at the same time, the amplifier board will give priority to the Bluetooth mode;
If you need to use the AUX mode, please make sure that the Bluetooth connection is disconnected.
Parameters
Model: ZK-MT21Bluetooth Version: 5.0 (Without occlusion 49 Feet) Audio Input: AUX + BluetoothChannel: 2.1 StereoAdaption Supply Voltage: 12-24V / 5A above(Do not connect to 24V battery pack)Speaker: 20-100W, 4-8OhmOutput Power: max 50W R&L channel; max 100W subwooferProtection Mechanism: Anti reverse connection, overheating, overcurrent, short circuit protection
NOTE
To have enough output power if the audio input is sufficient and the supply voltage/current is sufficient. The power supply voltage is higher and the relative power will be larger. The speakers with different impedances will have different output power. In the case of sufficient voltage and current, the larger the ohms of the horn, the smaller the relative sound power. Please ensure that the power of the adaptor is greater than the actual working power of the amplifier. (A power supply of more than 12V 5A is recommended.)
Independent Control of Treble and Bass
The bass audio and volume can be adjusted separately, and with the left and right channel speakers, the 2.1 channel brings you a richer sound experience.
Extra-large Heat Sink
The extra-large heat sink can provide good heat dissipation for the continuous high-power output of the AMP, thus preventing the chip from being burned.
Easy to Connect
The universal 5.5mm*2.1mm DC power interface can be compatible with most of the DC power adapters. Supports 3.5mm audio input. Quick-connect terminal blocks make wiring easier
Package Includes:
Bluetooth Amplifier board * 1Acrylic shell * 2Knob * 5Screwdriver * 1DC plug adapter * 1
Package Dimensions : 5.16 x 4.41 x 2.05 inches; 6.38 ounces
Item model number : MT21
Date First Available : March 20, 2024
Manufacturer : Hosyond
ASIN : B0CYLW7NRC
Country of Origin : China
[Two Input Methods] It has two audio input methods: Bluetooth and 3.5mm AUX. Bluetooth 5.0 version, higher transmission efficiency, transmission distance up to 49 feet (no obstruction).
[Treble and Bass Adjustment] 2.1 channel, maximum output power 2X50W+100W. By adjusting the high and low frequency knobs, you can make the sound more layered and the bass more shocking.
[Protection Function] It has short circuit protection, overcurrent, overheating, and anti-reverse connection protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage.
[High Quality] Features copper DC connectors and barrier style terminals. It can withstand large currents without generating heat or damaging wires. Comes with a DC head lead, which is compatible with the input power interface of this product. Even if you don’t have a DC head adapter or battery, you can easily connect it.
[Application] Widely used in store solicitation, home theaters, DIY speakers, etc. If you have any questions about the product, or the product has quality problems, please feel free to contact us and we will give you a satisfactory answer.
Patrick –
Used to upgrade my proton pack
Easy to put together and has good shielding which makes for good sound quality. Some reviews didn’t like that it didn’t come with a pre wired power supply, that was advantageous for my project. I was able to easily wire it up to an adapter for the 18v ryobi one battery of which I have several of. Paired with a 60w subwoofer and two 8w speakers it sounds incredible. The limitations are on how much the bass makes the pack rattle. I particularly like how I can control the speakers and bass volumes independently. Fit inside my pack in the battery opening perfectly for easy access to volume control when not wearing the pack. The amount of sound upgrade for the price I paid is phenomenal. When I get a chance I’ll include a video of it coming to life
Lia G –
Good sound
The overall sound is pretty good, but the transmitter makes this weird sound when I plug it into my PC and when it’s connected to Bluetooth it will stop outputting noise whenever the audio gets quiet enough and will do that in less than one second so it’s not even just for quiet scenes in a movie or something. It’s even during music while a quiet part is happening. I plugged it into a 90 W computer charger and it seems to run fine on it.
some user –
Not what was advertised
Got the non-bluetooth amp, even though the description was for one with bluetooth capability. Unfortunately was away and missed the return deadline. Had to buy another (TB, not MT). Performance-wise, they both pack a punch for how tiny they are. Not super quiet, but for general music listening around the house using a sub and a couple bookshelf speakers, an inexpensive option to an actual HT receiver.
Michael R. –
Nice little amp with a sub output!
This is a really nice amp. I gutted my Logitech computer subwoofer and hardwired it to the sub output and it works great and got a pair of cheap pyramid speakers as well and mounted them on the side of the sub housing. I also upgraded the power supply to 24vdc to get the most power output to the speakers.
k007sam –
Amazing product easy setup
Works awesome. I was able to fix my old set of Creative 2.1 speakers with this! Amazing product, best price .. worth it. Bluetooth mode is a little tough to figure out and it won’t unpaid unless done via the original paired device… Wish it had a reset button, but other than that, I haven’t had any other issues.I use it with a 12-24 v adapter that came with the same Creative speakers. It fits perfectly.!
Dont worry bout it –
Not shabby
Works pretty good other than bluetooth range is approximately 5 feet then it cuts out.
Alex –
Sounds great
I bought it because my grandparents always had the TV so loud and their camper has surround sound on the roof, so I decided to hook the surround sound up to their TV, and it sounds great for the price.
Alex Castro –
nice, but 1 flaw
so, I’m new to these mini amps, but wow how surprised I am by the power they can output with the right speakers! i have this on my motorcycle connected to 2 8ohm kicker speakers + 2 tweeters(generic) and 1 kicker for subwoofer plus a Logitech subwoofer computer speaker I ripped out. I sound louder than car speakers with these (4 total). The 1 flaw this amp has is that it stays on even after turning it off with the knob switch it brings… i have to unplug it from the power supply to shut it off. Not a big deal for me but might be for others.