---
product_id: 646991457
title: "ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W"
brand: "digiyes"
price: "€ 37.55"
currency: EUR
in_stock: true
reviews_count: 13
category: "Di Gi Yes"
url: https://www.desertcart.hr/products/646991457-zk-mt21-bluetooth-power-amplifier-board-2-1-channel-50w
store_origin: HR
region: Croatia
---

# Bluetooth 5.0 with 49ft range 200W max output power Bass, treble & subwoofer control ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W

**Brand:** digiyes
**Price:** € 37.55
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your sound game—power, precision, and wireless freedom in one sleek amp!

## Quick Answers

- **What is this?** ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W by digiyes
- **How much does it cost?** € 37.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/646991457-zk-mt21-bluetooth-power-amplifier-board-2-1-channel-50w)

## Best For

- digiyes enthusiasts

## Why This Product

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

## Key Features

- • **Precision Sound Tuning:** Adjust bass, treble, and subwoofer levels with tactile knobs for a custom theater-like experience.
- • **Powerhouse Audio Output:** 2.1 channel delivers 50W x 2 + 100W subwoofer power for immersive sound.
- • **Robust Safety Protections:** Built-in short circuit, over-current, over-heat, and reverse polarity safeguards keep your setup secure.
- • **Compact & Versatile Design:** Miniature footprint fits car audio or home theater setups, with easy 3.5mm AUX input and durable copper connectors.
- • **Seamless Bluetooth 5.0 Connectivity:** Wirelessly stream your playlists up to 49 feet away—cut the cords, not the vibe.

## Overview

The ZK-MT21 Bluetooth Power Amplifier Board is a compact 2.1 channel amplifier delivering up to 200W total output (50W per stereo channel plus 100W subwoofer). Featuring Bluetooth 5.0 with a 49-foot wireless range and a 3.5mm AUX input, it offers versatile connectivity. Users can fine-tune bass, treble, and subwoofer levels via analog control knobs for a personalized audio experience. Designed with multiple safety protections and durable copper connectors, it supports 12-24V power supplies and fits seamlessly into car or home audio systems.

## Description

Buy ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W | Mini amp module. quickly connects. Fits car audio speakers/home theater. with bass,treble,subwoofer and volume control: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: IT IS BLUETOOTH EVEN THOUGH IT IS NOT LABELED ON THE OUTER SHELL - IT WORKS GREAT! AFTER I PUT IT TOGETHER I WAS TRYING TO CONNECT IT TO BLUETOOTH BUT IT WOULDN'T I THOUGHT T WAS DEFECTIVE OR THEY SENT ME THE WRONG ONE. TURNE OUT IT WAS CONNECTING TO THE NEIGHBORS DEVICE. EVEN THOUGH THIS AMP DOESN'T SAY NLUETOOTH ON IT, IT IS IN FACT 100% BLUETOOTH ENABLED. I'M SO I WAS BUMMED THAT I WAS GOING TO HAVE TO RETURN IT BUT NOW I DON'T HAVE TO. (OPERATOR ERROR) I REALLY LIKE THE ANALOG FEEL OF THE KNOBS, THEY'RE NOT FLOPPY OR LOOSE AND THEY CAN BE DIALED IN NICELY. JUST REMEMBER THERE IS NO POWER CORD INCLUDED WITH THIS AMP, SO MAKE SURE TO BUY ONE. I'M USING A 20V POWER SOURCE TO RUN IT AND IT WORKS JUST FINE. EASY TO BUILD TOO. IT WEIGHS ABOUT AS MUCH AS A PAIR OF EYEGLASSES. I LIKE IT SO FAR & I'M JUST USING IT TO RUN A DUAL SUBWOOFER TO SOME OLD 3-WAY AIWA 250W SHELF SPEAKERS FROM 2001 IN THE GARAGE AND IT SOUNDS GOOD.
Review: You have a 50/50 chance - I have to rewrite this review because apparently it makes people look bad. I received a used item. I finished the assembly, and am buying a 12V adapter today to see if it works. It looks to be a good item, and while mine was not exactly pristine, it shouldn’t have any issues as it looks by all accounts to be in good working order. If it works, I’ll be updating with a sound test video as I am using it for a custom piece of art that plays music. The unit itself is brilliant in its design and simplicity. The only real issue that I can see going forward is you are going to want to use thinner wire than the heavy gauge stuff that I was going to use originally. A connector might bridge the gap just fine, though. The switch for the on off is tight, and gives a solid click when shut off, not spongy. The other knobs turn smoothly and assembly on this is very simple. Very small screws, so if you have big hands get yourself a magnetized screwdriver so you don’t lose them. Took all of 5 minutes to assemble out of the box, though there was one nut already affixed. It is also labeled 12-24V which means you have some options to power it with and it has a headphone jack to connect it via aux channel. Bluetooth, is the other option which I think might be easier if you are just using it to power some speakers. It is a solid design, and if it works, I hope it holds up for a long time. Good value for the money.

## Features

- The ZK-MT21 power amplifier board uses Bluetooth 5.0, and its transmission distance can reach 49 feet (without obstruction). At the same time, this power amplifier board has a 3.5mm AUX audio input interface. No matter what kind of input method, you can always find a method that suits you
- With bass, treble, subwoofer frequency and volume control, easy to adjust volume, enjoy the music tone what you want. If you are tired of the inherent high & low bass, why not try the high & low control knob. This will make you feel like being in a movie theater
- Bluetooth audio amplifier module 2.1 channel, Max output power 2X50W+100W. Speaker Matching Guide: Left & Right Channels (Stereo): 6.5 inch, 4-8 ohms, 50W each (Max. RMS); Subwoofer Channel (Bass): 8 inch, 4-8 ohms, 100W (Max. RMS)
- ZK-MT21 Bluetooth 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(NOTE: It is recommended that the maximum voltage should not exceed 22V. Otherwise, overvoltage protection may be triggered, which will limit the output current and cause the maximum power to be reduced)
- It adopts copper DC connector and fence type terminal. It can withstand large current, no heat, no damage to the wire. Using a universal 5.5mm * 2.1mm plug interface for power supply

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CW5ZF6FD |
| Best Sellers Rank | #15,736 in Electronics ( See Top 100 in Electronics ) #69 in Audio Component Amplifiers |
| Brand | DiGiYes |
| Brand Name | DiGiYes |
| Customer Reviews | 4.4 out of 5 stars 191 Reviews |
| Included Components | 1 x ZK-MT21 Bluetooth Power Amplifier Board |
| Item Dimensions | 3.66 x 3.54 x 0.87 inches |
| Item Highlight | Mini amp module. quickly connects. Fits car audio speakers/home theater. with bass,treble,subwoofer and volume control |
| Item dimensions L x W x H | 3.66 x 3.54 x 0.87 inches |
| Manufacturer | DiGiYes |
| Material Type | Copper |
| Maximum Output Power | 200 watts |
| Maximum Supply Voltage | 24 volts_of_direct_current |
| Minimum Supply Voltage | 12 volts_of_direct_current |
| Model | ZK-MT21 |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Output Power | 200 watts |
| Package Type Name | [ORIGINAL_MANUFACTURER_BOX] |
| Part Number | ZK-MT21 |
| Specification Met | FCC |
| Supply Current | 5 A |
| Warranty Description | This item can be returned in its original condition for a replacement within 30 days of receipt. |

## Product Details

- **Item dimensions L x W x H:** 3.66 x 3.54 x 0.87 inches
- **Manufacturer:** DiGiYes
- **Maximum Supply Voltage:** 24 volts_of_direct_current
- **Minimum Supply Voltage:** 12 volts_of_direct_current
- **Mounting Type:** Surface Mount

## Images

![ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W - Image 1](https://m.media-amazon.com/images/I/61-SEZXiivL.jpg)
![ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W - Image 2](https://m.media-amazon.com/images/I/81e-KCscRlL.jpg)
![ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W - Image 3](https://m.media-amazon.com/images/I/71PnpeZEXGL.jpg)
![ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W - Image 4](https://m.media-amazon.com/images/I/71O2aCM8SsL.jpg)
![ZK-MT21 Bluetooth Power Amplifier Board 2.1 Channel 50W x 2 + 100W - Image 5](https://m.media-amazon.com/images/I/71edyhCzFFL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ IT IS BLUETOOTH EVEN THOUGH IT IS NOT LABELED ON THE OUTER SHELL
*by C***F on June 24, 2026*

IT WORKS GREAT! AFTER I PUT IT TOGETHER I WAS TRYING TO CONNECT IT TO BLUETOOTH BUT IT WOULDN'T I THOUGHT T WAS DEFECTIVE OR THEY SENT ME THE WRONG ONE. TURNE OUT IT WAS CONNECTING TO THE NEIGHBORS DEVICE. EVEN THOUGH THIS AMP DOESN'T SAY NLUETOOTH ON IT, IT IS IN FACT 100% BLUETOOTH ENABLED. I'M SO I WAS BUMMED THAT I WAS GOING TO HAVE TO RETURN IT BUT NOW I DON'T HAVE TO. (OPERATOR ERROR) I REALLY LIKE THE ANALOG FEEL OF THE KNOBS, THEY'RE NOT FLOPPY OR LOOSE AND THEY CAN BE DIALED IN NICELY. JUST REMEMBER THERE IS NO POWER CORD INCLUDED WITH THIS AMP, SO MAKE SURE TO BUY ONE. I'M USING A 20V POWER SOURCE TO RUN IT AND IT WORKS JUST FINE. EASY TO BUILD TOO. IT WEIGHS ABOUT AS MUCH AS A PAIR OF EYEGLASSES. I LIKE IT SO FAR & I'M JUST USING IT TO RUN A DUAL SUBWOOFER TO SOME OLD 3-WAY AIWA 250W SHELF SPEAKERS FROM 2001 IN THE GARAGE AND IT SOUNDS GOOD.

### ⭐⭐⭐⭐⭐ You have a 50/50 chance
*by T***. on July 11, 2026*

I have to rewrite this review because apparently it makes people look bad. I received a used item. I finished the assembly, and am buying a 12V adapter today to see if it works. It looks to be a good item, and while mine was not exactly pristine, it shouldn’t have any issues as it looks by all accounts to be in good working order. If it works, I’ll be updating with a sound test video as I am using it for a custom piece of art that plays music. The unit itself is brilliant in its design and simplicity. The only real issue that I can see going forward is you are going to want to use thinner wire than the heavy gauge stuff that I was going to use originally. A connector might bridge the gap just fine, though. The switch for the on off is tight, and gives a solid click when shut off, not spongy. The other knobs turn smoothly and assembly on this is very simple. Very small screws, so if you have big hands get yourself a magnetized screwdriver so you don’t lose them. Took all of 5 minutes to assemble out of the box, though there was one nut already affixed. It is also labeled 12-24V which means you have some options to power it with and it has a headphone jack to connect it via aux channel. Bluetooth, is the other option which I think might be easier if you are just using it to power some speakers. It is a solid design, and if it works, I hope it holds up for a long time. Good value for the money.

### ⭐⭐⭐⭐⭐ Very good
*by A***A on July 31, 2026*

Added some bass to my room I am very pleased, the outer casing is made from metal so it seems pretty durable, it was easy to put together and the Bluetooth was the only thing that worked, the aux port didn’t work. 5 stars very good product

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-09-23*