---
product_id: 664937454
title: "Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers(20-100W, 4-8¦¸), DC 12-24V, BT AUX Input"
brand: "arrarown"
price: "$98.21"
currency: USD
in_stock: true
reviews_count: 5
category: "Arrarown"
url: https://www.desertcart.ec/products/664937454-bluetooth-5-0-audio-amplifier-board-zk-mt21-2-1
store_origin: EC
region: Ecuador
---

# Bluetooth 5.0 with 49ft Range 2.1 Channel 200W Output Independent Treble & Bass Control Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers(20-100W, 4-8¦¸), DC 12-24V, BT AUX Input

**Brand:** arrarown
**Price:** $98.21
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound game with power, precision, and wireless freedom!

## Quick Answers

- **What is this?** Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers(20-100W, 4-8¦¸), DC 12-24V, BT AUX Input by arrarown
- **How much does it cost?** $98.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/664937454-bluetooth-5-0-audio-amplifier-board-zk-mt21-2-1)

## Best For

- arrarown enthusiasts

## Why This Product

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

## Key Features

- • **Tailor Your Sound Profile:** Adjust treble and bass independently for a personalized HiFi audio experience that stands out in any room.
- • **Robust Protection Circuitry:** Built-in over-voltage, under-voltage, over-heat, and short-circuit safeguards ensure reliable, long-lasting performance.
- • **Compact & User-Friendly Design:** Miniature footprint with clear interface labels makes installation a breeze—ideal for home, car, or party setups.
- • **Powerful 2.1 Channel Amplification:** Experience crystal-clear sound with 50W x 2 stereo plus 100W subwoofer output, perfect for immersive home audio setups.
- • **Seamless Bluetooth 5.0 Connectivity:** Wirelessly stream your favorite playlists up to 49 feet away, eliminating cables and boosting convenience.

## Overview

The ZK-MT21 Bluetooth 5.0 Audio Amplifier Board delivers a potent 2.1 channel output (50W x 2 + 100W subwoofer) with advanced HiFi digital amplification. Featuring Bluetooth 5.0 wireless streaming up to 49 feet and 3.5mm AUX input, it offers versatile connectivity. Independent treble and bass controls let you customize your audio profile, while comprehensive protection circuits ensure durability. Its compact size and intuitive design make it perfect for upgrading home speakers, car audio, or portable sound systems.

## Description

Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers(20-100W, 4-8¦¸), DC 12-24V, BT AUX Input

Review: Great little amp. Used this to replace my klipsch ProMedia 2.1 amp, night and day difference. You have more control over the sound and the Bluetooth is a great feature. One thing I would like to see maybe in a future revision is a bluetooth antenna especially if you have the unit under a very thick wooded desk. Edit: I have noticed that when I shut down my laptop there is high pitch hum coming from the speakers, I’m using high quality audio cable. Very annoying.
Review: Easy to use and assemble, I use it for my center channel Klipsch speaker and it powers it fine. Bluetooth can reach from across the room and handles different devices well

## Features

- Subwoofer Audio Amplifier Board: This ZK-MT21 with two powerful hifi audiochip drive, 4 low noise preamplifiers, and a large-capacity energy storage capacitor, just a little sound distortion. 2.1 channel 50W * 2 +100W stereo and subwoofer output, In addition, it comes with an antenna holder solder joint for external antenna connection (antenna not included in the package)
- Bluetooth 5.0 AUX INPUT, This MT21 is designed with 2 types of inputs: Bluetooth 5.0 wireless connection, and its transmission distance can reach 49 feet (without obstruction), and 3.5mm AUX audio input, Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected
- Treble and Bass Adjustment: This digital Amp board with independent treble and bass adjustment buttons,you can directly adjust the treble and bass through the module, By adjusting the high and low frequency knobs of ZK-MT21, you can make the sound more layered and make the bass more shocking, and the treble more clear, enjoy the HiFi sound quality
- With Protective Function: This MT21 Bluetooth amp module is designed with over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection, with case to protective it
- Mini Size and Easy Installation: The illustration of each interface is printed on the protective plate, making it easy to install and use even without instructions. Small size: 3.74 in*3.54 in*0.87 in, easy to carry, suitable home, car, bar,party and outdoor

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DDN8CLGG |
| Item model number | MT21 |
| Manufacturer | DideaECO |
| Package Dimensions | 13.31 x 11 x 5.31 cm; 191 g |

## Product Details

- **Manufacturer:** DideaECO
- **Maximum supply voltage:** 24 Volts (DC)
- **Minimum supply voltage:** 12 Volts (DC)
- **Mounting type:** Freestanding
- **Voltage:** 12 Volts (DC)

## Images

![Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers(20-100W, 4-8¦¸), DC 12-24V, BT AUX Input - Image 1](https://m.media-amazon.com/images/I/712r7Ym87TL.jpg)

## Customer Reviews

### ⭐⭐⭐ Review
*by D***D on 11 January 2026*

Great little amp. Used this to replace my klipsch ProMedia 2.1 amp, night and day difference. You have more control over the sound and the Bluetooth is a great feature. One thing I would like to see maybe in a future revision is a bluetooth antenna especially if you have the unit under a very thick wooded desk. Edit: I have noticed that when I shut down my laptop there is high pitch hum coming from the speakers, I’m using high quality audio cable. Very annoying.

### ⭐⭐⭐⭐⭐ Review
*by A***N on 4 December 2025*

Easy to use and assemble, I use it for my center channel Klipsch speaker and it powers it fine. Bluetooth can reach from across the room and handles different devices well

### ⭐ Review
*by J***S on 22 October 2025*

Bought to make 2 parable speaker boxes and they work fine separately but the tws feature don't work and they won't pair together after following the pairing instructions and after researching how to pair them they still won't pair

## Frequently Bought Together

- ARRAROWN Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers (20-100W, 4-8), DC 12-24V, BT AUX Input
- YFUSET 6PCS 4Ohm 5W Full Range Audio Speaker Bass Stereo Woofer Loudspeaker Compatible with Arduino (Blue)

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**Shop now:** [https://www.desertcart.ec/products/664937454-bluetooth-5-0-audio-amplifier-board-zk-mt21-2-1](https://www.desertcart.ec/products/664937454-bluetooth-5-0-audio-amplifier-board-zk-mt21-2-1)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-11*