---
product_id: 372229617
title: "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 (ZK-TB21)"
brand: "damgoo"
price: "€ 4.35"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.com.cy/products/372229617-50w-50w-100w-2-1-channel-subwoofer-amplifier-board-treble
store_origin: CY
region: Cyprus
---

# Bluetooth 5.0 with 49ft range 200W total output power Adjustable treble & bass control 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 (ZK-TB21)

**Brand:** damgoo
**Price:** € 4.35
**Availability:** ❌ Out of Stock

## Summary

> 🎵 Elevate your DIY audio game with power, precision, and wireless freedom!

## Quick Answers

- **What is this?** 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 (ZK-TB21) by damgoo
- **How much does it cost?** € 4.35 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/372229617-50w-50w-100w-2-1-channel-subwoofer-amplifier-board-treble)

## 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:** Robust multi-layer safety protections guard against overheating, voltage spikes, and short circuits.
- • **Seamless Connectivity:** Bluetooth 5.0 and AUX inputs ensure effortless wireless or wired streaming without password hassle.
- • **Plug & Play Simplicity:** User-friendly interface with clear port icons means zero manual stress—just pure sound.
- • **Powerhouse Performance:** Delivers crisp 50W+50W stereo plus 100W subwoofer output for immersive sound.
- • **Tailored Audio Experience:** Fine-tune your sound with intuitive treble and bass knobs—cinema vibes at your fingertips.

## Overview

The ZK-TB21 is a compact 2.1 channel amplifier board featuring dual TPA3116D2 chips delivering up to 200W total output (50W+50W stereo plus 100W subwoofer). It supports Bluetooth 5.0 with a 49-foot transmission range and AUX input for versatile connectivity. Equipped with treble and bass controls, it offers customizable sound tuning. Designed for durability, it includes multiple safety protections such as overheat, overvoltage, and short circuit safeguards. Ideal for DIY wireless speaker projects, it operates on 12-24V DC and comes with a user-friendly interface and 24/7 customer support.

## Description

Product feature description: ① What is the TPA3116D2 chip? TPA3116D2 is a Class D power amplifier IC launched by TI, with very high index parameters. The highest modulation frequency can reach 1.2MHZ, and the high-power output distortion is less than 0.1% ② I hate reading the manual? Please be assured that you do not read the manual! We have added a variety of interface logos on the cool black shell, so that you can see at a glance, even if you do not need a manual, you can connect it correctly. ③ How many signal input methods does it have? Bluetooth and AUX input methods! When these two input methods input signals at the same time, the Bluetooth input method is the priority input method. If you want to use AUX, please disconnect the Bluetooth connection. ④ Is it durable? This is beyond doubt! This amp board has 4 kinds of protection mechanisms: overvoltage protection, undervoltage protection, overheat protection, short circuit protection, which means it is not easy to be damaged! ⑤ Warm reminder: The power switch on the board is a standby switch. After the switch is turned off, the machine is in a low-power standby state. To completely turn off the power or unplug it for a long time, you can unplug the DC plug on the machine. Properly increasing the voltage or reducing the speaker impedance can effectively increase the output power. ⑥ Packing: ZK-TB21 Power Amplifier Board * 1 Protective Shell * 1 Set DC Jack * 1 Screwdriver * 1 Knob * 1 7 * 24 hours 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 satisfactory answer.

Review: Super potente, me levantó facilísimo dos bafles antiguos Fisher con un bajo, una bocina y un tweter cada bafle. Le coloque una fuente de laptop de 19V/3Amp y no se calienta. Recomendado al 100%
Review: Ho comprato questa scheda amplificatore Bluetooth a 2.1 canali per collegarlo in parallelo all'impianto acustico che avevo in garage, collegato ad un autoradio Apline 50W X 4... però mi serviva anche un ricevitore bluetooth per collegare il mio smatphone… il collegamento è stato fatto in parallelo con l’autoradio inserendo un commutatore per l’alimentazione come in foto, in modo da poter accendere solo l’autoradio oppure solo la scheda amplificatore Bluetooth, come alimentatore ho usato quello che avevo per l’autoradio (trasformatore stabilizzatore 13,6v 5A) il tutto funziona molto bene, l’impianto è formato da un sub woofer da 50W + un woofer da 50W + due casse a tre vie da 100W +100W, alzando il volume al 50% il suono è molto forte e con il giusto settaggio si sente moto bene, lo uso da circa due mesi e non ha dato nessun problema. Qualità/prezzo eccellente, Lo consiglio. N.B. per avere una buona resa bisogna collegarlo ad un trasformatore con una buona potenza, altrimenti quando si alza il volume non rende bene perchè ha bisogno di più potenza,

## Features

- TPA3116D2 HIFI Chip Solution: Stereo Dual-channel Output to Ensure Continuous Serial High-power Operation, THD ≤0.1%. Wide Voltage Input DC: 12-24V;
- Treble & Bass Control: 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 and AUX Function: Bluetooth 5.0 version, Transmission Distance Is Farther. The Transmission Distance Can Reach 49 Feet In An Open Environment. If your Play Device Does Not Have Bluetooth, You Can Also Input Audio Signals Through The 3.5MM Headphone Plug.；
- Safety Protection: This Amp Board Has Overheat Protection, Reverse protection, Circuit Protection, Over-voltage and Under-voltage Protection；
- 7 * 24 Hours 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 | B089KT3FG9 |
| Department | Electronics & DIY |
| Item model number | ZK-TB21 |
| Manufacturer | DAMGOO |
| Product Dimensions | 120 x 100 x 22 cm; 195 g |

## Product Details

- **Item dimensions L x W x H:** 120 x 100 x 22 centimeters
- **Manufacturer:** DAMGOO
- **Maximum supply voltage:** 24 Volts (DC)
- **Minimum supply voltage:** 12 Volts (DC)
- **Voltage:** 24 Volts

## Images

![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 (ZK-TB21) - Image 1](https://m.media-amazon.com/images/I/61FQudol+CL.jpg)
![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 (ZK-TB21) - Image 2](https://m.media-amazon.com/images/I/61gUgtGIQFL.jpg)
![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 (ZK-TB21) - Image 3](https://m.media-amazon.com/images/I/71WaCuexZtL.jpg)
![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 (ZK-TB21) - Image 4](https://m.media-amazon.com/images/I/71m6lcMyQ2L.jpg)
![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 (ZK-TB21) - Image 5](https://m.media-amazon.com/images/I/71uSbObYhQL.jpg)

## 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

### ⭐⭐⭐⭐⭐ Review
*by S***. on 15 February 2023*

Super potente, me levantó facilísimo dos bafles antiguos Fisher con un bajo, una bocina y un tweter cada bafle. Le coloque una fuente de laptop de 19V/3Amp y no se calienta. Recomendado al 100%

### ⭐⭐⭐⭐⭐ Review
*by A***O on 14 April 2021*

Ho comprato questa scheda amplificatore Bluetooth a 2.1 canali per collegarlo in parallelo all'impianto acustico che avevo in garage, collegato ad un autoradio Apline 50W X 4... però mi serviva anche un ricevitore bluetooth per collegare il mio smatphone… il collegamento è stato fatto in parallelo con l’autoradio inserendo un commutatore per l’alimentazione come in foto, in modo da poter accendere solo l’autoradio oppure solo la scheda amplificatore Bluetooth, come alimentatore ho usato quello che avevo per l’autoradio (trasformatore stabilizzatore 13,6v 5A) il tutto funziona molto bene, l’impianto è formato da un sub woofer da 50W + un woofer da 50W + due casse a tre vie da 100W +100W, alzando il volume al 50% il suono è molto forte e con il giusto settaggio si sente moto bene, lo uso da circa due mesi e non ha dato nessun problema. Qualità/prezzo eccellente, Lo consiglio. N.B. per avere una buona resa bisogna collegarlo ad un trasformatore con una buona potenza, altrimenti quando si alza il volume non rende bene perchè ha bisogno di più potenza,

### ⭐⭐⭐⭐⭐ Review
*by G***N on 6 August 2021*

For the price of it this produces great sound quality and has lots of power

## Frequently Bought Together

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-02*