ZK-MT21 100W+2*50W 2.1 Channel Bluetooth 5.0 Amp HiFi Subwoofer Digital Power Amplifier Board AUX 12/24V Audio Stereo For Home

(8 customer reviews)

12.74$ – 17.57$

In Stock

Color

Clear

Description

High-concerned chemical: None
Package: Yes
Model Number: Power Amplifier Board
Maximum Power Per Channel: 50 W
Brand Name: ALLOYSEED
Origin: Mainland China
Certification: CE

ZK-MT21 2x50W+100W 2.1 Channel Subwoofer Digital Power Amplifier Board AUX 12V 24V Audio Stereo Bluetooth-compatible 5.0 Bass Amp for Home Theater Speaker
Feature:
The Bluetooth-compatible audio power amplifier module has 2.1 channels and the maximum output power is 2X50W+100W.
It has two audio input modes, AUX and Bluetooth-compatible, and a two-in-one power amplifier board. Bluetooth-compatible5.0, higher transmission efficiency, longer transmission distance
It has short-circuit protection, over-current, over-heating, and anti-reverse protection to prevent total failure. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage
It adopts copper DC connectors and barrier terminals. It can withstand high current without heating or damaging wires.
Classic appearance multi-function main knob. The main knob adopts a rotary encoder that is only used in high-end power amplifiers, which realizes 360-degree stepless tuning and a smooth one-key start and stop. The operation is simple and convenient by long pressing the switch.
With bass, treble, subwoofer frequency and volume control, you can easily adjust the volume and enjoy the music tone you want. It is widely used in shopping malls, home theaters, speakers, etc.

Specification:
Product name: 2.1 channel Bluetooth-compatible audio power amplifier module
Product model: ZK-MT21
Bluetooth-compatible version: 5.0 (unobstructed, 15 meters)
Input sensitivity: 500mV
Input method: AUX+ Bluetooth-compatible
Number of channels: 2.1 channels
Power amplifier chip: Domestic power amplifier chip
Adapter power supply: above DC12-24V/5A (24V battery pack is not allowed)
Adapted speakers: 20-100W, 4-8Q
Output power: left and right channels <50W; subwoofer <100W
Protection mechanism: Anti-reverse connection, overheating, overcurrent, short circuit protection
Product size: 93mm*90mm*22mm
Product weight: about 130g

Notice:
The product can be connected with an external antenna, but does not include an antenna and an antenna base, please purchase it separately.
Tip: Only when the audio input is enough and the power supply voltage/current is enough, there will be enough output power!!!
The higher the power supply voltage, the greater the output power, and the smaller the speaker impedance, the greater the output power!!! Please make sure that the power of the adapted power supply is greater than the actual working power of the amplifier!!!

Note:
Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
Please allow 1-2cm measuring deviation due to manual measurement.

1 X Power Amplifier Board
1 X Accessory Pack

Additional information

High-concerned chemical	None
Package	Yes
Model Number	Power Amplifier Board
Maximum Power Per Channel	50 W
Brand Name	ALLOYSEED
Origin	Mainland China
Certification	CE
Color	2x50W, 2x50W and 100W

8 reviews for ZK-MT21 100W+2*50W 2.1 Channel Bluetooth 5.0 Amp HiFi Subwoofer Digital Power Amplifier Board AUX 12/24V Audio Stereo For Home

Rated 5 out of 5

j***o (verified owner) – June 26, 2025

Very good
Rated 5 out of 5

L***a (verified owner) – August 4, 2025

Excellent, everything I could expect. I recommend it 100%.
Moreover, it arrived in just 7 days, thank you.
Rated 4 out of 5

m***r (verified owner) – August 22, 2025

Good sound although it gets a bit hot after a while.
Rated 5 out of 5

M***r (verified owner) – August 25, 2025

Sounds good for the price, the sw frequency knob is very useful for small subs with a more limited low range, also the tone controls for the l/r channels allows more fine tunning. Would buy again.
Rated 5 out of 5

C***s (verified owner) – August 29, 2025

in excellent condition 10/10
Rated 5 out of 5

J***s (verified owner) – September 17, 2025

This bluetooth amplifier works great with a plug-in speaker and a bass speaker plugged into a 12v to 26v adapter. It has a headphone jack to connect a radio input or another sound device.
Rated 5 out of 5

A***i (verified owner) – December 16, 2025

Well done
Rated 5 out of 5

AliExpress Shopper (verified owner) – February 28, 2026

It arrived in excellent condition, very powerful for its size. You just need to be patient; it takes 14 days to arrive, but it’s worth the wait.