50W+50W+100W 2.1 Channel Subwoofer Amplifier Board with Treble and Bass Control, Dual TPA3116 Chip, DC 12-24V, Bluetooth and AUX Inputs, DIY Wireless Speakers AMP Board, Password Free
Price: $25.99
(as of Oct 06, 2025 10:28:50 UTC – Details)
Product description
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Customer Reviews
4.4 out of 5 stars 1,021
4.4 out of 5 stars 11
Price
$25.99$25.99 $15.99$15.99
Input Mode
AUX/Bluetooth Voltage Input:AC100-240V
Chip
TPA3116D2 Voltage Output:DC19V 4.74A
MAX Power Output Per Channel
50W+50W+100W Plug Style:5.5*2.5mm(Compatible with 5.5 * 2.1mm)
Working Voltage
DC12-24V no data
Recommended speaker parameters
20-100W(4-8Ω） no data
Treble& Bass Controlotection
✓
no data
Heat Dissipation
50*25*10mm Heat Sink no data
Dial Button
× no data
ZK-TB21 Bluetooth Amplifier Board
Input Voltage: DC 12V-24VMax Power Output: 50W*2（R&L）+100W（Subwoofer）Input Method: Bluetooth & AUXChannel: 2.1 CH Stereo OutputOutput Impedance：4-8ΩBluetooth Version：BT 5.0Protection Functions: Reverse Connection Protection Short Circuit Protection Self-recovery Overheat ProtectionSize: 120*100*22mmWeight: 195g
TPA3116 D2 Is A Class D Power Amplifier IC
Launched by TI, with very high index parameters. The highest modulation frequency can reach 1.2MHZ, and the high-power output distortion is less than 0.1%
50*25*10MM Large Heat Sink
The large heat sink can provide good heat dissipation effect for the continuous high-power output of AMP, thus avoiding the chip from being burned out.
Multiple Power Input Methods
High-grade fence terminal-convenient wiring, not easy to short circuit;
Two power input methods can meet your different wiring needs.
NOTE
Only when the audio input is sufficient and the power supply voltage/current input is sufficient, can there be enough power output.The higher the power supply voltage, the greater the output power;The smaller the impedance of the speaker, the greater the output power. It is recommended to use a 4Ω speaker.Finally, please make sure that the power of the adapted power supply is greater than the actual working power of the AMP to ensure the maximum output power.
Warm Reminder:
The power switch on the board is a standby switch. After the switch is turned off, the machine is in a low-power standby state. To completely turn off the power or unplug it for a long time, you can unplug the DC plug on the machine. Properly increasing the voltage or reducing the speaker impedance can effectively increase the output power.
Packing Include:
ZK-TB21 Power Amplifier Board * 1Protective Shell * 1 SetDC Plug * 1Screwdriver * 1Knob * 5
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 feel free to consult at any time, we will give you a 100% satisfactory answer.
Is Discontinued By Manufacturer : No
Product Dimensions : 47.24 x 39.37 x 8.66 inches; 6.88 ounces
Item model number : ZK-TB21
Date First Available : May 7, 2020
Manufacturer : DAMGOO
ASIN : B089KT3FG9
Best Sellers Rank: #25,456 in Electronics (See Top 100 in Electronics) #124 in Audio Component Amplifiers
Customer Reviews: 4.4 4.4 out of 5 stars 1,021 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
TPA3116D2 HIFI Chip Solution: Stereo Dual-channel Output to Ensure Continuous Serial High-power Operation, THD ≤0.1%. Wide Voltage Input DC: 12-24V;
Treble & Bass Control: If You Are Tired of The Inherent High& Low Bass, Why Not Try The High & Low Control Knob! This Will Make You Feel Like Being In A Movie Theater.；
Bluetooth and AUX Function: Bluetooth 5.0 version, Transmission Distance Is Farther. The Transmission Distance Can Reach 49 Feet In An Open Environment. If your Play Device Does Not Have Bluetooth, You Can Also Input Audio Signals Through The 3.5MM Headphone Plug.；
Safety Protection: This Amp Board Has Overheat Protection, Reverse protection, Circuit Protection, Over-voltage and Under-voltage Protection；
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.
Customers say
Customers find the amplifier delivers great sound quality, with one mentioning it powers 2 4×6 speakers well, and appreciate its functionality, with one noting it works perfectly with a 19V 3.5A power adapter. They praise its power output, with one customer highlighting its suitability for desktop bookshelf speakers, and consider it good value for money, with one mentioning it fixed their computer system for much cheaper. The volume control receives positive feedback for its Bose-like low frequency adjustability, and while Bluetooth connectivity is generally great, some customers report connection drops. Durability is a concern, with multiple customers reporting the amplifier failing after a few months of use.
