Search  for anything...
DAJUNGUO

Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control for DIY Bluetooth Audio and Store Home Theater

    • Based on 330 reviews
Condition: New
Checking for product changes
$23.98 Why this price?
Save $66.01 was $89.99

Buy Now, Pay Later

As low as $5 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Jun 5
Order within 11 hours and 5 minutes
Available payment plans shown during checkout

Features

  • Bluetooth & 3.5mm AUX The ZK-MT21 power amplifier board uses Bluetooth 5.0, and its transmission distance can reach 49 feet (without obstruction). At the same time, this power amplifier board has a 3.5mm AUX audio input interface. No matter what kind of input method, you can always find a method that suits you.
  • Treble and bass adjustmentIf you are tired of power amplifiers with only a single volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of ZK-MT21, you can make the sound more layered and make the bass more shocking.
  • High compatibilityThe DC adapters on the market (plug specification 5.5mm*2.1mm) basically can meet the needs of the ZK-MT21 Bluetooth power amplifier board. If your existing DC power plug is not 5.5mm*2.1mm, there is no The problem is because we have included a DC conversion plug in the product.
  • Protection functionZK-MT21 Bluetooth power amplifier board has multiple protection mechanisms to ensure its safe operation. It has short-circuit protection, over-current, over-heat, and anti-reverse protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage
  • 7 * 24 Hours After-sales Service Paying Attention To Customer Experience And Satisfying Customers Is Our Service Tenet. If You Have Any Questions About The Product, or The Product Has Quality Problems, Please Contact Us At Any Time, We Will Give You A 100% Satisfactory Answer

Item dimensions L x W x H: 44.4 x 42.48 x 10.32 inches


Voltage: 20 Volts


Manufacturer: DAJUNGUO


Mounting Type: Surface Mount


Brand: DAJUNGUO


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 44.4 x 42.48 x 10.32 inches; 4.59 ounces


Item model number ‏ : ‎ ZK-MT21


Date First Available ‏ : ‎ September 30, 2021


Manufacturer ‏ : ‎ DAJUNGUO


Country of Origin ‏ : ‎ China


Best Sellers Rank: #29,630 in Electronics (See Top 100 in Electronics) #98 in Audio Component Amplifiers


#98 in Audio Component Amplifiers:


Customer Reviews: 4.4 4.4 out of 5 stars 330 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jun 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Apple Pay Later
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • It isn't expensive, but it works!
the terminals for wire attachment are very small, get terminal ends for your wire attachment accordingly. BT is seamless, worked perfectly for me. Bass is properly filtered out and sent to sub as evidenced by the sub control. VERY easy, and very minor assembly.
Reviewed in the United States on January 20, 2024 by Jim Lombardo
    • Good amp
Review Image by A. Smith A. Smith
Review Image by A. Smith A. Smith
Used this to make a BT shop speaker out of an old 12 inch sub box. Just works. No issues.
Reviewed in the United States on March 3, 2024 by A. Smith A. Smith
    • Great Little amp!
I was very skeptical about this little amp. Well let me tell you that this thing works great! I read that some said it over heated so I mounted inside of an aluminum box with two fans. I used this amp to reuse my old set of EV speakers. They are a really nice set of speakers with a subwoofer. Well the internal amp went bad so I gutted them and wired them direct. With this little amp they sound better that they did with the original internal amp. The stereo separation is great and the subwoofer kicks way more than it did with the original amp. I just purchased two more of the little amps. I don't know how long it will last but right now this thing works great. I don't know how many watts this thing really puts out but it is quite enough to power most speakers. ... show more
Reviewed in the United States on March 27, 2023 by MFS
    • Great little unit
I bought this to provide a super-simple audio source for my teenage daughter's bedroom. This lil' dude fit the bill. It is no bigger than a sandwich and can be placed in an unobtrusive place. Set up and build was pretty straightforward (I do have electronics experience, so my learning curve may be slightly lower than some) the instructions are a bit hard to follow if that's all you are relying on but doable. And yes, parts and pieces are small to tiny but THAT'S THE POINT. I was able to use slightly thicker gauge, speaker wire by nipping off enough jacket to form a "y" with the naked wire and feed it on either side of the connection set screw, instead of the whole twist being on one side of the set screw. Just be patient. One thing I noticed and this may be more of an issue with the power supply(just bought the recommended) when plugging the PS into the amp, the connector sparks a tiny bit every time IFyou are already supplied A/C from your outlet, plug in the amp side first. It wasn't enough for me to be concerned but rather a condition that probably wouldn't pass UL standards. You be the judge. Amp has sufficient power @4ohms to crank a pair of descent bookshelf sized or smaller speakers. It'll get pretty loud and remain clear till you don't want to go much louder. I wasn't using all that great of speakers but fidelity was fine for it's application. The sub channel was... there. I noodle with the frequency sweep and output to where it was acceptable and sounded OK. Again, I was not using the best sub by a looong stretch, but it was good enough to add and fill some low end to the variety of music she'll be listening to. I/we are satisfied with those unit, but you must TAKE IT FOR WHAT IT IS. We'll see how long gnit lasts, make sure it has some decent ventilation, it does heat up a bit and might thermal protect if it can't breathe a bit. ... show more
Reviewed in the United States on February 23, 2022 by robio5150
    • Kinda supprised
I thought this would be a good cheap amp for a project I was working on. I bought on price and features instead of reputation and quality parts. Well, for once I got more than I paid for. Sounds great and it gives what seems like a legitimate 50wpc. Have not hooked up to a subwoofer but assume will also be surprised by that too. It is kinda funny how the Chinese think we find value clues in products. Just cause you call something "Top Quality" does not make it so. This amp was surprising though. Could use bigger lugs for speaker hookup and power switch on the volume control hearkens back to pocket radios. Ok, nit picking at best on a really inexpensive 2.1 amp for sure. ... show more
Reviewed in the United States on November 16, 2023 by Tech N. Cal
    • Good Amp that does not take up much space but, not perfect sound quality.
It's a good AMP but, there is a hissing sound when there is no Audio playing. I bought it to go into a Video game cabinet and it works well for that purpose. If you are listening to music you may want to pick something else.
Reviewed in the United States on August 19, 2022 by Lee
    • Perfecto
Trabaja perfecto, muy bien, está trabajando en una moto eléctrica en Cuba y es espectacular..
Reviewed in the United States on May 7, 2024 by Martha Hernandez Xiques
    • Awesome or product
It is a lot better than what I had expected. You should get if you are interested in audio stuff.
Reviewed in the United States on February 22, 2024 by Elmer Meece

Can't find a product?

Find it on Amazon first, then paste the link below.