---
product_id: 368986425
title: "ZK-MT21"
brand: "dajunguo"
price: "MX$880"
currency: MXN
in_stock: true
category: "Dajunguo"
url: https://www.desertcart.mx/products/368986425-zk-mt21
store_origin: MX
region: Mexico
---

# 50W×2 + 100W subwoofer power 12-24V wide voltage input Adjustable treble & bass controls ZK-MT21

**Brand:** dajunguo
**Price:** MX$880
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your sound game—power, control, and clarity in one sleek board!

## Quick Answers

- **What is this?** ZK-MT21 by dajunguo
- **How much does it cost?** MX$880 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/368986425-zk-mt21)

## 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 ensures your amplifier stays in top shape, anytime you need.
- • **Precision Audio Tuning:** Customize your soundscape with dedicated treble and bass knobs for rich, layered audio.
- • **Robust Safety Features:** Built-in short-circuit, over-current, over-heat, and reverse polarity protection for worry-free performance.
- • **Universal Connectivity:** Seamlessly connect via Bluetooth, AUX, or USB—compatible with all your devices, from phones to laptops.
- • **Immersive 2.1 Channel Power:** Experience crystal-clear stereo with booming 100W subwoofer punch for next-level sound.

## Overview

The ZK-MT21 Bluetooth Power Amplifier Board delivers a powerful 2.1 channel output with 50W per stereo channel plus a 100W subwoofer, operating efficiently on a wide 12-24V input range. Featuring the high-fidelity TPA3116D2 chip, it offers ultra-low distortion (THD ≤0.1%) and versatile connectivity options including Bluetooth, AUX, and USB. With adjustable treble and bass controls, plus comprehensive protection mechanisms, this compact 4.37x4.05 inch module ensures premium sound quality and reliable, safe operation for all your audio projects.

## 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 | #19,283 in Electronics ( See Top 100 in Electronics ) #82 in Audio Component Amplifiers |
| Brand Name | DAJUNGUO |
| Customer Reviews | 4.4 4.4 out of 5 stars (449) |
| Included Components | amplifier board |
| Item Dimensions | 4.37 x 4.05 x 1.02 inches |
| Item Weight | 130 g |
| Manufacturer | DAJUNGUO |
| Maximum Supply Voltage | 24 volts |
| Minimum Supply Voltage | 12 volts_of_direct_current |
| Model | ZK-MT21 |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Package Type Name | Hard Case |
| Part Number | ZK-MT21 |
| Supply Current | 5 A |
| UPC | 194852390669 |
| 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_of_direct_current
- **Voltage:** 20 volts

## Images

![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.mx/products/368986425-zk-mt21](https://www.desertcart.mx/products/368986425-zk-mt21)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-09-06*