---
product_id: 213403491
title: "ZK-TB21"
brand: "damgoo"
price: "£22.55"
currency: GBP
in_stock: true
reviews_count: 1
category: "Damgoo"
url: https://www.desertcart.co.uk/products/213403491-zk-tb21
store_origin: GB
region: United Kingdom
---

# 200W total output power Wide 12-24V DC input range Adjustable treble & bass controls ZK-TB21

**Brand:** damgoo
**Price:** £22.55
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** ZK-TB21 by damgoo
- **How much does it cost?** £22.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/213403491-zk-tb21)

## Best For

- damgoo enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last & Safe:** Advanced protections guard against overheating, voltage issues, and reverse polarity for worry-free use.
- • **Seamless Connectivity:** Bluetooth 5.0 with 49ft range plus AUX input ensures effortless wireless or wired streaming.
- • **Flexible Voltage Range:** Operates seamlessly on 12-24V DC, perfect for diverse DIY setups and power sources.
- • **Powerhouse Performance:** Delivers a robust 50W+50W stereo plus 100W subwoofer output for immersive sound.
- • **Tailored Audio Experience:** Fine-tune your sound with smooth treble, bass, and subwoofer volume knobs for theater-like clarity.

## Overview

The DAMGOO 2.1 Channel Subwoofer Amplifier Board packs 200W total power with dual TPA3116 chips, supporting 12-24V DC input. It features Bluetooth 5.0 and AUX inputs for versatile connectivity, plus adjustable treble, bass, and subwoofer controls for a customized audio experience. Designed for DIY wireless speaker projects, it includes multiple safety protections and delivers crisp, distortion-free sound with professional-grade efficiency.

## Description

Buy ZK-TB21 2.1 Channel Bluetooth Amplifier Board, 50W+50W+100W Output, IPEX-1 Antenna Base, 12-24V DC Input, Customizable Bluetooth Name (DAJUNGUO ZK-TB21 Black): Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Poor quality, pay more for a better product - Amp stopped working the day it arrived

## Features

- 【Bluetooth 5.1+3.5MM AUX】The ZK-TB21 supports Bluetooth and AUX inputs, compatible with most devices such as smartphones, TVs, and laptops, allowing you to connect easily.
- 【TPA3116D2 HIFI Chip Solution】 Stereo Dual-channel Output to Ensure Continuous Serial High-power Operation, THD ≤0.1%. Wide Voltage Input DC: 12-24V;
- 【Enhanced Bluetooth Connectivity】Comes with both onboard and external IPX (MHF1) Bluetooth antenna base, improving signal strength and range without requiring soldering.
- 【Safety Protection】This Amp Board Has Overheat Protection, Reverse protection, Circuit Protection, Over-voltage and Under-voltage Protection；
- 【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 100% Satisfactory Answer.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0FN8CXZSY |
| Best Sellers Rank | #22,606 in Electronics ( See Top 100 in Electronics ) #153 in Audio Component Amplifiers |
| Brand | DAMGOO |
| Brand Name | DAMGOO |
| Customer Reviews | 1.0 out of 5 stars 1 Review |
| Item Dimensions | 47.24 x 39.37 x 8.66 inches |
| Item dimensions L x W x H | 47.24 x 39.37 x 8.66 inches |
| Manufacturer | DAMGOO |
| Maximum Output Power | 200 watts |
| Maximum Supply Voltage | 24 Volts (DC) |
| Minimum Supply Voltage | 12 Volts (DC) |
| Model | DAJUNGUO ZK-TB21 |
| Mounting Type | Freestanding |
| Number of Channels | 2 |
| Output Power | 200 Watts |
| Part Number | ZK-TB21 |
| Specification Met | Amazon's Standards |
| Supply Current | 5 Amps |
| UPC | 194852391963 |
| Unit Count | 1.0 Count |

## Product Details

- **Item dimensions L x W x H:** 4.72 x 3.94 x 0.87 inches
- **Manufacturer:** DAMGOO
- **Maximum Supply Voltage:** 24 Volts (DC)
- **Minimum Supply Voltage:** 12 Volts (DC)
- **Voltage:** 24 Volts

## Images

![ZK-TB21 - Image 1](https://m.media-amazon.com/images/I/71asv+I-v4L.jpg)
![ZK-TB21 - Image 2](https://m.media-amazon.com/images/I/81QXNEVRMxL.jpg)
![ZK-TB21 - Image 3](https://m.media-amazon.com/images/I/91QZGsXbOqL.jpg)
![ZK-TB21 - Image 4](https://m.media-amazon.com/images/I/91UI5wA0QUL.jpg)
![ZK-TB21 - Image 5](https://m.media-amazon.com/images/I/81zsZsMGhuL.jpg)

## Available Options

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

## Questions & Answers

**Q: Does it come with a power cord ?**
A: No, you can use a 19v laptop charger but to get this thing fed what it needs buy a 24v 250watt power supply.

**Q: What is the low pass cut off for the subwoofer?**
A: The frequency of the bass channel is 20hz-200hz

**Q: Would I be able to hook up a regular speaker to the "subwoofer" channel, if I wanted to individually control the volume of that one speaker?**
A: The answer that specifies your frequency limitations is correct. If you connect a full range speaker, it will not sound good. But you can if you don't care about sound quality, in which case you should just go back under your rock and stay there.

**Q: I would want to use this for aux input only. can i set it to default to aux input? or do i have to switch from bluetooth to aux each time i power on?**
A: It comes default in aux , there is no such switch for it , to answer your question in simple words, when you get it just connect the aux to it and don't werry about nothing else.

## Customer Reviews

### ⭐ Poor quality, pay more for a better product
*by C***A on March 24, 2026*

Amp stopped working the day it arrived

## Frequently Bought Together

- 50W+50W+100W 2.1 Channel Subwoofer Amplifier Board with Treble and Bass Control, Dual TPA3116 Chip, DC 12-24V, Bluetooth and AUX Inputs, DIY Wireless Speakers AMP Board, Password Free
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**Shop now:** [https://www.desertcart.co.uk/products/213403491-zk-tb21](https://www.desertcart.co.uk/products/213403491-zk-tb21)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-21*