---
product_id: 368986425
title: "ZK-TB21 Power Amplifier Board Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs"
brand: "dajunguo"
price: "$46.95"
currency: USD
in_stock: true
reviews_count: 12
category: "Dajunguo"
url: https://www.desertcart.us/products/368986425-zk-tb21-power-amplifier-board-bluetooth5-1-tpa3116-chip-subwoofer
store_origin: US
region: United States of America
---

# 200W total output power 12-24V wide voltage input Independent treble & bass control ZK-TB21 Power Amplifier Board Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs

**Brand:** dajunguo
**Price:** $46.95
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound game — power, control, and connectivity in one sleek amp!

## Quick Answers

- **What is this?** ZK-TB21 Power Amplifier Board Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs by dajunguo
- **How much does it cost?** $46.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/368986425-zk-tb21-power-amplifier-board-bluetooth5-1-tpa3116-chip-subwoofer)

## Best For

- dajunguo enthusiasts

## Why This Product

- Trusted dajunguo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Versatile:** Lightweight 130g design fits custom builds and portable party speakers with ease.
- • **Seamless Connectivity:** Supports Bluetooth, AUX, and USB inputs to effortlessly link all your devices.
- • **Built to Last & Protect:** Equipped with short-circuit, over-current, over-heat, and reverse polarity safeguards.
- • **Power-Packed Performance:** Delivers a robust 50W×2 + 100W subwoofer output for immersive sound.
- • **Tailored Audio Experience:** Adjust treble and bass independently for perfectly layered, dynamic sound.

## Overview

The ZK-MT21 Bluetooth Power Amplifier Board is a compact yet powerful 2.1 channel audio module delivering 200W total output (50W×2 + 100W subwoofer). It supports multiple inputs including Bluetooth, AUX, and USB, and features independent treble and bass controls for a customizable audio experience. Designed with advanced protection mechanisms and a wide 12-24V voltage range, it’s ideal for custom speaker projects and portable setups seeking high-fidelity sound with reliable performance.

## Description

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

Review: Very happy with it - I’ve been using this amp for a close to a year and it connects fast works great it was cheap and works better than most high end amps I’ve gotten very impressed
Review: Chiquito pero poderoso - No pensé que esta cosa trabajara tan bien

## Features

- 【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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DTYQQYRF |
| Best Sellers Rank | #69,900 in Electronics ( See Top 100 in Electronics ) #420 in Audio Component Amplifiers |
| Brand Name | DAJUNGUO |
| Customer Reviews | 4.5 out of 5 stars 52 Reviews |
| Included Components | amplifier board |
| Item Dimensions | 4.4 x 3.9 x 0.87 inches |
| Item Weight | 210 Grams |
| Item dimensions L x W x H | 4.4 x 3.9 x 0.87 inches |
| Manufacturer | DAJUNGUO |
| Maximum Supply Voltage | 24 Volts |
| Minimum Supply Voltage | 12 Volts |
| Model | ZK-TB21 |
| Mounting Type | Freestanding |
| Number of Channels | 3 |
| Output Power | 200 Watts |
| Part Number | ZK-TB21 |
| Supply Current | 5 Amps |
| UPC | 194852394124 |
| Voltage | 24 Volts (DC) |

## Product Details

- **Item dimensions L x W x H:** 4.37 x 4.05 x 1.02 inches
- **Manufacturer:** DAJUNGUO
- **Maximum Supply Voltage:** 24 Volts
- **Minimum Supply Voltage:** 12 Volts (DC)
- **Voltage:** 20 Volts

## Images

![ZK-TB21 Power Amplifier Board Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs - Image 1](https://m.media-amazon.com/images/I/71asv+I-v4L.jpg)
![ZK-TB21 Power Amplifier Board Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs - Image 2](https://m.media-amazon.com/images/I/813ypJMIlbL.jpg)
![ZK-TB21 Power Amplifier Board Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs - Image 3](https://m.media-amazon.com/images/I/91QZGsXbOqL.jpg)
![ZK-TB21 Power Amplifier Board Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs - Image 4](https://m.media-amazon.com/images/I/91UI5wA0QUL.jpg)
![ZK-TB21 Power Amplifier Board Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs - Image 5](https://m.media-amazon.com/images/I/818IAfhrqwL.jpg)

## Available Options

This product comes in different **Model** options.

## Questions & Answers

**Q: Can someone please recommend the correct battery to operate this product**
A: I purchased a 24Vdc@10 amps power supply.   A lithium battery supply from parts Express using 5 18650's cells is 21Vdc and would work just fine.

**Q: Will it be useful to install a crossover? or is it not necessary?**
A: I have tree of these running Speakers and sub-woofers with no crossover.

**Q: does the main volume affect the sub volume or are they completely independent?**
A: The sub volume is not completely independent . I guess it’s kinda like having a gain adjustment on a car stereo amp ..

**Q: What is the output wattage using a 12v input at 8 ohms?**
A: 12 watts or so.  To get 50W you need 24V at about 3.5 amps at 4 ohms.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very happy with it
*by H***R on March 2, 2026*

I’ve been using this amp for a close to a year and it connects fast works great it was cheap and works better than most high end amps I’ve gotten very impressed

### ⭐⭐⭐⭐⭐ Chiquito pero poderoso
*by J***O on February 5, 2026*

No pensé que esta cosa trabajara tan bien

### ⭐⭐⭐⭐⭐ Nice
*by A***S on November 6, 2025*

Really good I just need to get a better power cord

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-13*