Hello. i just unpacked my unit, and when i plug it in, the led display does not come on, how do i get it to activate? is my unit broken?

I believe your unit may be broken.

Speakers a and c work but b and d do not. not even the same channel, any ideas ??

Kenneth's answer isn't correct. The subwoofer connects through the RCA port on the lower right. I'm not sure why only half of your speakers are working.

Is this unit a blue-tooth receiver or a blue-tooth transmitter?

think of it as an audio receiver through a Bluetooth or aux connection - your phone would connect to it over Bluetooth (or a stereo 3.5mm cable if your phone has a headphone jack) and send Spotify or other music to this device, which would send the audio out through speaker wires.

What is the max of watts

I'm not sure of the max watts, but it gets really loud even at 15. I have to constantly yell down to my son to "Turn It Down!"

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Facmogu 4.1CH Bluetooth 5.0 Stereo Amplifier, Max 800W RMS 40Wx4 Subwoofer Amplifier with Active Subwoofer Output, Hi-Fi Integrated Mini Speaker Amp for Home Theater & Karaoke, Includes Power Adapter

Facmogu 4.1CH Bluetooth 5.0 Stereo Amplifier, Max 800W RMS 40Wx4 Subwoofer Amplifier with Active Subwoofer Output, Hi-Fi Integrated Mini Speaker Amp for Home Theater & Karaoke, Includes Power Adapter

Product ID: 659567564

Details

Voltage
12 Volts
Manufacturer
Facmogu
Maximum supply voltage
12 Volts (DC)
Minimum supply voltage
12 Volts (DC)
Mounting type
Surface Mount

📶Bluetooth 5.0 with 30ft range

🔊4x40W RMS power output

🎚️Dual volume & tone controls

NT$5345

Duties & taxes included

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Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎵 Elevate your soundscape—because your space deserves more than just noise.

DUAL VOLUME ZONES - Control two speaker groups independently—perfect for creating distinct sound atmospheres in different rooms or outdoor spaces.
USER FRIENDLY INTERFACE - Bright LED display, bass & treble knobs, plus remote control for effortless, personalized audio tuning from anywhere.
ACTIVE SUBWOOFER SUPPORT - Exclusive active subwoofer output ensures deep, punchy bass that passive subs just can’t match.
POWERFUL 4 1 CHANNEL OUTPUT - Delivers a peak 800W RMS to energize your home theater or karaoke setup with crystal-clear sound.
SEAMLESS BLUETOOTH 5 0 CONNECTIVITY - Enjoy wireless streaming from any device within 30ft, cutting the clutter and boosting convenience.

The Facmogu 4.1CH Bluetooth 5.0 Stereo Amplifier packs a robust 800W peak power with 4x40W RMS channels and an active subwoofer output, delivering high-fidelity sound with less than 0.04% distortion. Featuring Bluetooth 5.0 for wireless streaming up to 30ft, multiple input options, dual volume controls for separate speaker zones, and easy bass/treble adjustments via remote and LED display, it’s designed for versatile home theater and karaoke experiences.

Reviews

O**I

Good little unit for the price.

It works good. Connects easily to my Bluetooth devices. Great price only thing I missed out on is radio. Using it to power some exciters and volume wise, it's loud enough for my purposes.

8.11.2025

C**R

excelente mini amplificador

excelente por el precio y calidad, un aceptable sonido repito es un mini amplificador y también lo que nadie te dice que el subwoofers que le conectes tiene que ser activo

18.12.2022

R**Y

Nice Amp With Subwoofer Output

Works and sounds great for very inexpensive cost Subwoofer output is the best part

24.02.2026

P**B

Excelente

Amplifica muy bien mis bocinas pasivas de 8omhs

28.03.2023

B**Y

It 800w max it good for 50 dollars

It a good budget amp it has well bass and volume and it don't get to hot

7.04.2026

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NT$5345

Duties & taxes included

In stock

Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Taiwan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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ASIN	B097C6BLHY
Brand	Facmogu
Customer Reviews	4.1 out of 5 stars 605 Reviews
Manufacturer	Facmogu
Mfr Part Number	A18301-MG-US
Model Number	A18301-MG-US

Facmogu 4.1CH Bluetooth 5.0 Stereo Amplifier, Max 800W RMS 40Wx4 Subwoofer Amplifier with Active Subwoofer Output, Hi-Fi Integrated Mini Speaker Amp for Home Theater & Karaoke, Includes Power Adapter

Details

Details

Description

Specifications

Reviews

Common Questions