---
product_id: 753714692
title: "Hosyond MT21 2.1 Channel Bluetooth 5.0 Amplifier Board, 50Wx2+100W, Treble & Bass Control, DIY Speaker, Home Theater, 12-24V, 5A, Copper Connectors, Protection Functions"
brand: "hosyond"
price: "$159.97"
currency: USD
in_stock: false
reviews_count: 5
url: https://www.desertcart.ec/products/753714692-hosyond-mt21-2-1-channel-bluetooth-5-0-amplifier-board
store_origin: EC
region: Ecuador
---

# Bluetooth 5.0, 49ft range 50Wx2+100W power output Multi-layer protection system Hosyond MT21 2.1 Channel Bluetooth 5.0 Amplifier Board, 50Wx2+100W, Treble & Bass Control, DIY Speaker, Home Theater, 12-24V, 5A, Copper Connectors, Protection Functions

**Brand:** hosyond
**Price:** $159.97
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Unleash epic soundwaves—your DIY home theater just got a serious upgrade!

## Quick Answers

- **What is this?** Hosyond MT21 2.1 Channel Bluetooth 5.0 Amplifier Board, 50Wx2+100W, Treble & Bass Control, DIY Speaker, Home Theater, 12-24V, 5A, Copper Connectors, Protection Functions by hosyond
- **How much does it cost?** $159.97 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/753714692-hosyond-mt21-2-1-channel-bluetooth-5-0-amplifier-board)

## Best For

- hosyond enthusiasts

## Why This Product

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

## Key Features

- • **DIY Audio Mastery:** Easy assembly with included accessories and versatile inputs (Bluetooth + AUX) make it perfect for home theaters and custom speaker projects.
- • **Power that Moves You:** Experience thunderous 2.1 channel sound with 50W per stereo channel and a booming 100W subwoofer output.
- • **Tailor Your Soundscape:** Adjust treble and bass knobs to craft perfectly layered audio that hits every note with precision.
- • **Built to Last & Protect:** Copper connectors and advanced protections guard against short circuits, overheating, and reverse polarity for worry-free use.
- • **Seamless Wireless Freedom:** Bluetooth 5.0 ensures crystal-clear audio streaming up to 49 feet—ditch the cords and elevate your space.

## Overview

The Hosyond MT21 is a compact yet powerful 2.1 channel Bluetooth 5.0 amplifier board delivering up to 50W per stereo channel and 100W to the subwoofer. Featuring dual audio inputs (Bluetooth and 3.5mm AUX), adjustable treble and bass controls, and robust protection mechanisms, it’s designed for DIY speaker builds and home theater setups. With copper connectors and a wide 12-24V power range, it ensures reliable, high-quality sound performance and durability.

## Description

Parameters Model: ZK-MT21 Bluetooth Version: 5.0 (Without occlusion 49 Feet) Audio Input: AUX + Bluetooth Channel: 2.1 Stereo Adaption Supply Voltage: 12-24V / 5A above(Do not connect to 24V battery pack) Speaker: 20-100W, 4-8Ohm Output Power: max 50W R&L channel; max 100W subwoofer Protection Mechanism: Anti reverse connection, overheating, overcurrent, short circuit protection NOTE: Please note that this product does not include a power supply, you need to equip it with a DC power supply. Tip: To have enough output power if the audio input is sufficient and the supply voltage/current is sufficient. The power supply voltage is higher and the relative power will be larger. The speakers with different impedances will have different output power. In the case of sufficient voltage and current, the larger the ohms of the horn, the smaller the relative sound power. Please ensure that the power of the adaptor is greater than the actual working power of the amplifier. It is recommended to use a DC power supply within 20V. If you use a battery pack to supply power, make sure that the battery voltage is lower than the rated voltage when the battery is fully charged. Package Includes: 1. Bluetooth Power Amplifier board * 1 2. Acrylic cover * 2 3. Accessories 4. Screwdriver * 1

Review: I have a couple of these. Bluetooth sounds better than using the cord. Use an appropriately powerful DC laptop brick or anything similar if you want the biggest sound. The one connected to my PC uses a 200w 20v DC brick to drive 4 speakers (2L and 2R in parallel) plus 2x 12in subs (also in parallel). It will shake things off the walls in my house. You won't believe the performance from such a cheap device. Pros: Easy to assemble, wire, and connect power. Bluetooth setup is simple. With the right power and speakers/sub, your neighbors will think there's an earthquake. Cons: Slight hiss if you leave the main volume knob turned up to max with nothing playing. If you're listening to something with pauses at low volume, it may not play the next spoken syllable or noise. This does not happen at medium volume or if the movie you are watching has birds chirping etc in the background. It's almost as if it goes to sleep for a fraction of a second.
Review: I'm actually surprised that this works as well as it does. I hooked it up to the speakers in an old Samsung TV soundbar and subwoofer. I usually connect via Bluetooth from my laptop. It sounds much better than anything this cheap has a right to sound. Everything functions, the Bluetooth is reliable. I can't figure out if this is the amp, but I have to keep turning down the subwoofer, probably because the speaker I hooked it up to is cheap. Otherwise, it's loud and clear.

## Features

- [Two Input Methods] It has two audio input methods: Bluetooth and 3.5mm AUX. Bluetooth 5.0 version, higher transmission efficiency, transmission distance up to 49 feet (no obstruction).
- [Treble and Bass Adjustment] 2.1 channel, maximum output power 2X50W+100W. By adjusting the high and low frequency knobs, you can make the sound more layered and the bass more shocking.
- [Protection Function] It has short circuit protection, overcurrent, overheating, and anti-reverse connection protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage.
- [High Quality] Features copper DC connectors and barrier style terminals. It can withstand large currents without generating heat or damaging wires. Comes with a DC head lead, which is compatible with the input power interface of this product. Even if you don’t have a DC head adapter or battery, you can easily connect it.
- [Application] Widely used in store solicitation, home theaters, DIY speakers, etc. If you have any questions about the product, or the product has quality problems, please feel free to contact us and we will give you a satisfactory answer.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CYLW7NRC |
| Batteries Required? | No |
| Customer Reviews | 4.4 4.4 out of 5 stars (174) |
| Date First Available | 12 April 2024 |
| Included components | 2.1 Bluetooth Amplifier board |
| Item Weight | 181 g |
| Item model number | MT21 |
| Manufacturer | Hosyond |
| Package Dimensions | 13.11 x 11.2 x 5.21 cm; 181 g |
| Part number | MT21 |
| Voltage | 12 Volts (DC) |

## Product Details

- **Brand:** Hosyond
- **Manufacturer:** Hosyond
- **Number of channels:** 2
- **UPC:** 768572762640
- **Voltage:** 12 Volts (DC)

## Images

![Hosyond MT21 2.1 Channel Bluetooth 5.0 Amplifier Board, 50Wx2+100W, Treble & Bass Control, DIY Speaker, Home Theater, 12-24V, 5A, Copper Connectors, Protection Functions - Image 1](https://m.media-amazon.com/images/I/415Bfyg3QtL.jpg)
![Hosyond MT21 2.1 Channel Bluetooth 5.0 Amplifier Board, 50Wx2+100W, Treble & Bass Control, DIY Speaker, Home Theater, 12-24V, 5A, Copper Connectors, Protection Functions - Image 2](https://m.media-amazon.com/images/I/416PpgiD20L.jpg)
![Hosyond MT21 2.1 Channel Bluetooth 5.0 Amplifier Board, 50Wx2+100W, Treble & Bass Control, DIY Speaker, Home Theater, 12-24V, 5A, Copper Connectors, Protection Functions - Image 3](https://m.media-amazon.com/images/I/41El-ycdkHL.jpg)
![Hosyond MT21 2.1 Channel Bluetooth 5.0 Amplifier Board, 50Wx2+100W, Treble & Bass Control, DIY Speaker, Home Theater, 12-24V, 5A, Copper Connectors, Protection Functions - Image 4](https://m.media-amazon.com/images/I/41PjnU7kT1L.jpg)
![Hosyond MT21 2.1 Channel Bluetooth 5.0 Amplifier Board, 50Wx2+100W, Treble & Bass Control, DIY Speaker, Home Theater, 12-24V, 5A, Copper Connectors, Protection Functions - Image 5](https://m.media-amazon.com/images/I/41ryBZ1OHgL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***R on 29 September 2025*

I have a couple of these. Bluetooth sounds better than using the cord. Use an appropriately powerful DC laptop brick or anything similar if you want the biggest sound. The one connected to my PC uses a 200w 20v DC brick to drive 4 speakers (2L and 2R in parallel) plus 2x 12in subs (also in parallel). It will shake things off the walls in my house. You won't believe the performance from such a cheap device. Pros: Easy to assemble, wire, and connect power. Bluetooth setup is simple. With the right power and speakers/sub, your neighbors will think there's an earthquake. Cons: Slight hiss if you leave the main volume knob turned up to max with nothing playing. If you're listening to something with pauses at low volume, it may not play the next spoken syllable or noise. This does not happen at medium volume or if the movie you are watching has birds chirping etc in the background. It's almost as if it goes to sleep for a fraction of a second.

### ⭐⭐⭐⭐⭐ Review
*by R***R on 7 January 2026*

I'm actually surprised that this works as well as it does. I hooked it up to the speakers in an old Samsung TV soundbar and subwoofer. I usually connect via Bluetooth from my laptop. It sounds much better than anything this cheap has a right to sound. Everything functions, the Bluetooth is reliable. I can't figure out if this is the amp, but I have to keep turning down the subwoofer, probably because the speaker I hooked it up to is cheap. Otherwise, it's loud and clear.

### ⭐⭐⭐⭐ Review
*by J***S on 7 October 2025*

Was skeptical required assembly and did not look like much, I have a Klipsec 2.1 the amp went out on and i am very impressed with the sound quality and volume of this little amp granted the speakers I am using are premium quality. Bluetooth works good hope it last for under $20 im very impressed sounds better than the THX certified amp it replaced.

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**Shop now:** [https://www.desertcart.ec/products/753714692-hosyond-mt21-2-1-channel-bluetooth-5-0-amplifier-board](https://www.desertcart.ec/products/753714692-hosyond-mt21-2-1-channel-bluetooth-5-0-amplifier-board)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-11*