Daakro ZK-TB21 Bluetooth Amplifier Board,50W+50W+100W 2.1 Channel Subwoofer Amp Board with Treble and Bass Control,DC 12-24V, Bluetooth and AUX Inputs, DIY Wireless Speakers AMP Board, Password Free
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Availability:
In Stock.
Arrives
Tuesday, May 19
Color: ZK-TB21
Features
- [Dual TPA3116D2 HiFi Chip]Daakro ZK-TB21 Bluetooth Amplifier Board uses the original imported TPA3116D2 HiFi amplifier chip with PurePath technology for ultra-high resolution, ultra-low distortion and high-fidelity sound quality. Supports 2.1-channel configuration, including left channel, right channel and subwoofer output. The left and right channels each provide 50W output power, and the subwoofer can reach a maximum output power of 100W, creating an immersive sound experience.
- [Dual Audio Input Modes] This amplifier board integrates AUX and Bluetooth 5.0 input methods. You can seamlessly connect with the latest Bluetooth 5.0 technology and enjoy the convenience of wireless, or you can choose the traditional AUX input connection to access the audio source. The vast majority of devices can be used, such as mobile phones, TVs, laptops, etc. It is very easy to connect and use, enjoy the fun of music.
- [Wide Application]The Daakro ZK-TB21 amplifier board supports a wide input voltage range from 12V to 24V DC, and can be powered by 12V, 15V, 18V, or 24V. This adaptability ensures that you can easily find the right power source. The board is suitable for 30-200W, 4-8 speakers, and can be perfectly matched with speakers of all sizes. Whether it is a small speaker or a large audio equipment, it can be coordinated with the amplifier board.
- [Comprehensive Protection]The Daakro ZK-TB21 Bluetooth Amplifier Board has a comprehensive built-in protection mechanism, including over-voltage protection, under-voltage protection, over-temperature protection, short-circuit protection and reverse connection protection. These smart protection features ensure that your device is protected in every situation, so you can enjoy your music with confidence.
- [Optimal Power Matching]Note that optimal audio output requires the correct combination of adequate audio input with appropriate power supply voltage and current. Different loudspeaker impedances affect relative sound power. A loudspeaker with a higher impedance will produce less relative sound power with sufficient voltage and current. Please be aware of these factors to optimize your audio experience.
Voltage: 12 Volts (DC)
Manufacturer: Daakro
Maximum Supply Voltage: 24 Volts (DC)
Minimum Supply Voltage: 12 Volts (DC)
Mounting Type: Surface Mount
Voltage: 12 Volts (DC)
Maximum Supply Voltage: 24 Volts (DC)
Minimum Supply Voltage: 12 Volts (DC)
Mounting Type: Surface Mount
Number of Channels: 2
Output Power: 200 Watts
Package Type Name: box" or "envelope
Specification Met: FCC
Manufacturer: Daakro
Model: ZK-TB21
Brand Name: Daakro
Included Components: Amplifier Board
Warranty Description: 30 Days
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, May 19
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: ZK-TB21
Just set this up about an hour ago. Just putting it together was worth the price. Super simple and straightforward. I'm powering it with 15v 6.33a which is enough to make get the zk-tb21 to sound really nice once I got the equalizer on it dialed in. The Bluetooth seems good to me, I've had it playing for about 90 minutes and no drops. That's like 1980s prices for an Amp. I'm in. Sounds nice
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Reviewed in the United States on May 10, 2025 by A B
Color: ZK-TB21
Man, this little $15 amp sounds better than my $3000 Marantz Surround System! Yeah, I wish! But on the real, it's a great little amp. Price was good. Shipping was fast. Packed well. The BT hooked up smoothly. It sounds good paired up to 4 Bose satellites & sub in my bedroom. It's been working for a month. I've got no complaints.
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Reviewed in the United States on July 27, 2025 by rihabn
Color: ZK-TB21
The media could not be loaded. Installed this in my 08 Xterra. It basically turned the entire existing speaker system into a giant BT speaker with a powered sub! Works flawlessly with all my Apple devices. This device along with a couple of very witty iPad Shortcuts essentially lets me use my iPad as a sort of Apple CarPlay device. Video is about half volume and sub is at about 3/4 vol and 40hz Freq. Sub is a 5in DIY. I disconnected the tweeters in the box, just fyi. Would have been 5 stars if it had metal knobs.
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Reviewed in the United States on September 27, 2025 by Charles Caudill
Color: ZK-TB21
Excellent sound quality crisp high highs clear distinguishable mids and super low lows. I used this for my sleeper gaming chair. It looks like and acts like a normal chair until this baby comes into play. Well worth the price although I worry about its durability. How long will it last if both the audio and power cables plug into their respective jack which is only soldered to thi board with no support at all. I can see these snapping off over time after a bit of movement or if installed with the weight of cords pulling downward with gravity. I would feel better if the enclosure supported these pieces if only a little bit the least. For its price and its sound quality it still deserves a 5 or higher if possible because its affordable to swap it out should said breakage occurs
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Reviewed in the United States on February 25, 2026 by Justa Hugh Monn II
Color: ZK-TB21
I waited to review this because it demanded my skills as an engineer to solve its somewhat subtle issues. I am using it in a somewhat unusual manner, which could have been part of the problem. Regardless, my review is based on how it behaved when I needed to use it. The first issue is that this seems to have been designed solely to be used with passive speaker systems. If you connect the subwoofer outputs to an active subwoofer, you get an intolerable hum. If you are using the AUX input, this hum starts as soon as the unit is OFF and a power supply is connected. As soon as you turn the unit on, the hum stops. This means that if you are using the AUX input you have to either keep the unit ON at all times, or else disconnect the output if you want silence when you are not using it. if you are using the bluetooth, the hum starts as soon as you make a bluetooth connection, and only stops when the bluetooth source actually starts to output a signal. You have the same problem with not being able to leave the unit on. I can give you the conclusions as to the problem with the circuit design that we determined from troubleshooting, but what would be the point?
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Reviewed in the United States on March 21, 2026 by Osikani Kofi
Color: ZK-TB21
This thing is blowing my mind man. So tiny but sounds so crisp and loud. I have it powering a Edison party system l1000 with the disco ball. Amazing!
Reviewed in the United States on July 31, 2025 by Qerop G.
Color: ZK-TB21
man this amplifier puts out some power. i would recommend using a 19v or 24volt charger. to get the most power out of your Amplifier. i can push myb1 12" Rockford fosgate sub. better for 5" -8" subwoofers. it will bump
Reviewed in the United States on February 2, 2026 by Roy p.
Color: ZK-TB21
El producto es muy bueno! Le conecte 1 subwoofer que tenia de una barra de sonido y valla bajo que entrega la verdad para un bajo no tan potente es decente en potencia, si quieres toda la potencia deves tener una fuente de 24v 10-15A para toda la potencia
Reviewed in the United States on October 26, 2025 by Jonathan g