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Product description

2.1 Channel 50W+50W+100W Amplifier Board

The ZK-TB21 is a 2.1 channel amplifier board equipped with two TPA3116D2 chips, delivering a peak power output of 50W+50W+100W. It supports Bluetooth 5.1 and 3.5mm AUX inputs, making it compatible with most devices and offering convenient connection options for users.

1st generation IPEX interface

The newly upgraded TB21 features a Bluetooth antenna interface with a 1st generation IPEX interface (antenna not included), allowing for the connection of an external Bluetooth antenna to further enhance connection stability, while supporting quick connection with Bluetooth devices such as smartphones.

Dual TPA3116D2 Chip：

Stereo Dual-channel Output to Ensure Continuous Serial High-power Operation, THD ≤0.1%. Wide Voltage Input DC: 12-24V

Upgrade DC socket：

Upgrade DC socket, no sparks generated, 5.1 * 2.1mm (compatible with 5.5 * 2.5mm)

Treble and Bass adjustment：

Treble and Bass can be independently adjusted according to your preferences

Large Heat Sink：

Enable the amplifier board to operate continuously and stably

Product Dimensions ‏ : ‎ 4.4 x 3.9 x 0.87 inches; 7.41 ounces
Item model number ‏ : ‎ ZK-TB21
Date First Available ‏ : ‎ January 24, 2025
Manufacturer ‏ : ‎ DAJUNGUO
ASIN ‏ : ‎ B0DTYQQYRF
Best Sellers Rank: #20,246 in Electronics (See Top 100 in Electronics) #89 in Audio Component Amplifiers
Customer Reviews: 4.2 4.2 out of 5 stars 23 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 CHIP】ZK-TB21 adopt TPA3116D2(with am interference suppression function) chips, with excellent sound quality. It ensures that even with high power operation for a long time, THD is less than 0.1%
【Bluetooth 5.1+3.5MM AUX】The ZK-TB21 supports Bluetooth and AUX inputs, compatible with most devices such as smartphones, TVs, and laptops, allowing you to connect easily.
【Bluetooth Antenna Base】The newly upgraded TB21 features the first-generation IPEX interface, allowing you to connect an external U.FL/IPEX 2.4G antenna to enhance the stability of the Bluetooth connection.
【Protection Function】The ZK-TB21 Bluetooth power amplifier features multiple protection mechanisms, including short-circuit protection, over-current protection, over-heat protection, and anti-reverse protection, to ensure its safe operation.
【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 Satisfactory Answer