---
product_id: 650977146
title: "Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers"
brand: "arrarown"
price: "€ 53.51"
currency: EUR
in_stock: true
reviews_count: 13
category: "Arrarown"
url: https://www.desertcart.de/products/650977146-bluetooth-audio-amplifier-board-zk-tb21-2-1ch-50w-x
store_origin: DE
region: Germany
---

# Bluetooth 5.0 wireless connectivity 100W powerful subwoofer output 50W x 2 stereo channels Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers

**Brand:** arrarown
**Price:** € 53.51
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers by arrarown
- **How much does it cost?** € 53.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/650977146-bluetooth-audio-amplifier-board-zk-tb21-2-1ch-50w-x)

## 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

- • **Rock-Solid Reliability:** Built-in over-voltage, under-voltage, over-heat, and short-circuit protections keep your setup safe and sound.
- • **Tailored Sound Control:** Fine-tune your audio with independent treble and bass adjustments directly on the amp—no app needed.
- • **Compact DIY Friendly Design:** Sleek, lightweight, and easy to install with clear interface labels—perfect for your custom home speaker projects.
- • **Immersive 2.1 Channel Powerhouse:** Experience crisp stereo with 50W per channel plus a booming 100W subwoofer for deep bass that fills your space.
- • **Seamless Bluetooth 5.0 & AUX Inputs:** Effortlessly switch between wireless streaming and wired AUX for ultimate audio flexibility.

## Overview

The ARRAROWN ZK-TB21 Bluetooth Audio Amplifier Board delivers a robust 2.1 channel output with 50W per stereo channel and a 100W subwoofer, featuring Bluetooth 5.0 and AUX inputs for versatile connectivity. It offers independent treble and bass controls for personalized sound tuning, enhanced by advanced noise suppression and multiple protective functions. Compact and user-friendly, it’s ideal for DIY home speaker enthusiasts seeking high-quality audio performance.

## Description

ARRAROWN Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers : desertcart.in: Electronics

Review: Good 👍 - Very nice product 👍👍
Review: Best amplifier ⭐⭐⭐⭐⭐ - Loved it U could definitely but this one for 2 speakrs of 50w and 1 subwoofer of 100w + there is and extra connector for subwoofer of low output. I got this as my old amplifier was dead which was a 5.1 then I got this 2.1 Just remember adapter is not included u would require an adapter of 12-24V and 8-10Amp for full utilization. In my case I used an old PSU of a pc which works great

## Features

- Subwoofer Audio Amplifier Board: 50W+50W+100W Bluetooth 5.0 wireless connection, Bluetooth+AUX audio input, 2.1 channel stereo output, just a little sound distortion. 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, without using the player or speaker;
- Perfect Sound Quality Experience: The audio power subwoofer amplifier module with powerful chip, AM interference suppression function, shielding power inductance, low noise front stage operational amplifier, let you enjoy a more perfect sound quality experience;
- With Protective Function: This Bluetooth Amp module is designed with over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection, with case to protective it;
- Easy Installation and Use: The illustration of each interface is printed on the protective plate, making it easy to install and use even without instructions. Small size: 4.72 in*3.94 in*0.7 in, easy to carry;

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08G1NZF3Y |
| Audio Wattage | 100 Watts |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | #10,724 in Electronics ( See Top 100 in Electronics ) #6 in Hi-Fi Amplifiers |
| Brand | ARRAROWN |
| Customer Reviews | 4.4 4.4 out of 5 stars (996) |
| Date First Available | 28 November 2020 |
| Item Weight | 240 g |
| Item model number | ZK-TB21 |
| Manufacturer | DideaECO |
| Maximum Supply Voltage | 24 Volts |
| Minimum Supply Voltage | 12 Volts (DC) |
| Model | ZK-TB21 |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Output Power | 100 Watts |
| Package Dimensions | 13.11 x 11.2 x 5.11 cm; 240 g |
| Package Type Name | Package" or "Kit |
| Power Source | corded electric |
| Specification Met | CE |
| Supply Current | 5 Amps |
| UPC | 789615751216 |
| Voltage | 24 Volts |

## Product Details

- **Manufacturer:** DideaECO
- **Maximum Supply Voltage:** 24 Volts
- **Minimum Supply Voltage:** 12 Volts (DC)
- **Mounting Type:** Surface Mount
- **Voltage:** 24 Volts

## Images

![Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers - Image 1](https://m.media-amazon.com/images/I/61j89C1+aIL.jpg)
![Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers - Image 2](https://m.media-amazon.com/images/I/61ouvu976bL.jpg)
![Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers - Image 3](https://m.media-amazon.com/images/I/71EDkNtx95L.jpg)
![Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers - Image 4](https://m.media-amazon.com/images/I/61+25l5cqkL.jpg)
![Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers - Image 5](https://m.media-amazon.com/images/I/61QBQzyXsqL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good 👍
*by H***O on 13 February 2026*

Very nice product 👍👍

### ⭐⭐⭐⭐⭐ Best amplifier ⭐⭐⭐⭐⭐
*by B***H on 10 February 2026*

Loved it U could definitely but this one for 2 speakrs of 50w and 1 subwoofer of 100w + there is and extra connector for subwoofer of low output. I got this as my old amplifier was dead which was a 5.1 then I got this 2.1 Just remember adapter is not included u would require an adapter of 12-24V and 8-10Amp for full utilization. In my case I used an old PSU of a pc which works great

### ⭐⭐⭐⭐⭐ OMG Awesome Power And Punch aworth For Money
*by S***U on 10 February 2026*

Worth For Money. Works Like Power Amplifier, I used 1100 Watts JBL Sub and 4 50 Watts Creative Speaker. the effect was too good. I just kept 70% volume only, sound effect is OMG too good too clear, Used 12V 5 amps power adaptor. That itself gave amazing results. I totally used for continuous 6 Hours no heating issues no power drop. If you use 24V believe me the sound effect its going to be mind blowing

## Frequently Bought Together

- ARRAROWN ZK-1002T 2.0 Channel Bluetooth 5.0 Amplifier Board 200W HiFi Subwoofer Audio AMP with Treble and Bass Control BT and AUX Inputs, DC 12-24V 2.0 Channel Stereo AMP Module for DIY Speakers
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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-03*