---
product_id: 368986425
title: "Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control (ZK-MT21)"
brand: "dajunguo"
price: "¥5994"
currency: JPY
in_stock: true
category: "Dajunguo"
url: https://www.desertcart.jp/products/368986425-bluetooth-power-amplifier-board-with-subwoofer-2-1-channel-50w
store_origin: JP
region: Japan
---

# 200W total output power 12-24V wide voltage input Adjustable treble & bass control Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control (ZK-MT21)

**Brand:** dajunguo
**Price:** ¥5994
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your audio game with power and precision!

## Quick Answers

- **What is this?** Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control (ZK-MT21) by dajunguo
- **How much does it cost?** ¥5994 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/368986425-bluetooth-power-amplifier-board-with-subwoofer-2-1-channel-50w)

## 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

- • **Reliable 24/7 Support:** Dedicated customer service ensuring your amplifier performs flawlessly
- • **Precision Audio Tuning:** Independent treble and bass knobs to customize your soundscape
- • **Robust Safety Features:** Built-in short-circuit, over-current, over-heat, and reverse polarity protection
- • **Universal Connectivity:** Bluetooth, AUX, and USB inputs for seamless device pairing
- • **Immersive 2.1 Channel Sound:** 50W×2 stereo plus 100W subwoofer for rich, room-filling audio

## Overview

The ZK-MT21 Bluetooth Power Amplifier Board delivers a powerful 200W 2.1 channel output with a high-fidelity TPA3116D2 chip, supporting a wide 12-24V input range. It offers versatile connectivity options including Bluetooth, AUX, and USB, plus customizable treble and bass controls for a tailored listening experience. Engineered with multiple protection mechanisms, it ensures safe, reliable operation, backed by responsive 24/7 customer support.

## Description

desertcart.com: Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control (ZK-MT21) : Electronics

## Features

- 【TPA3116D2 HIFI CHIP】TPA3116D2 HIFI Chip Solution: Stereo Dual-channel Output to Ensure Continuous Serial High-power Operation, THD ≤0.1%. Wide Voltage Input DC: 12-24V;
- 【MULTIPLE INPUT METHOD】The TB21 PROhas multiple input methods such as Bluetooth input, AUX input, and USB drive input. The vast majority of devices can be used, such as mobile phones, televisions, laptops, etc., making it easy to connect and use.
- 【TREBLE & BASS CONTROL】If you are tired of an amplifier with only one volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of the power amplifier board, you can make the sound more layered and make the bass more shocking.
- 【PROTECTION FUNCTION】TB21 PROBluetooth 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 Satisfactory Answer

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09HKB44JQ |
| Best Sellers Rank | #32,552 in Electronics ( See Top 100 in Electronics ) #174 in Audio Component Amplifiers |
| Brand Name | DAJUNGUO |
| Customer Reviews | 4.4 4.4 out of 5 stars (447) |
| Included Components | amplifier board |
| Item Dimensions | 4.37 x 4.05 x 1.02 inches |
| Item Weight | 130 Grams |
| Manufacturer | DAJUNGUO |
| Maximum Supply Voltage | 24 Volts |
| Minimum Supply Voltage | 12 Volts (DC) |
| Model | ZK-MT21 |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Output Power | 200 Watts |
| Package Type Name | Hard Case |
| Part Number | ZK-MT21 |
| Supply Current | 5 Amps |
| UPC | 194852390669 |
| Unit Count | 1 Count |
| Voltage | 20 Volts |

## 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

![Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control (ZK-MT21) - Image 1](https://m.media-amazon.com/images/I/714fIG2S9cL.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.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.jp/products/368986425-bluetooth-power-amplifier-board-with-subwoofer-2-1-channel-50w](https://www.desertcart.jp/products/368986425-bluetooth-power-amplifier-board-with-subwoofer-2-1-channel-50w)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-15*