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 S-299 4.1CH Bluetooth Power Amplifier with Active Subwoofer Output (NOT Passive Subwoofer), Max 800W RMS 40Wx4 Subwoofer Amplifier Hi-Fi Integrated Mini Speaker Amp Audio Sub Bass Amp

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

🎶Hi-Fi Sound

📶Bluetooth 5.0

🔊800W RMS Power

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VT50253

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In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎉 Elevate Your Sound Game with Facmogu299!

UNLEASH THE POWER - Max 800W RMS for an immersive audio experience.
EFFORTLESS CONTROL - Remote control and LED display for easy operation.
CRYSTAL CLEAR SOUND - Harmonic distortion < 0.04% for pristine audio clarity.
VERSATILE CONNECTIVITY - Connect via Bluetooth, AUX, USB, or SD/TF card.
TAILORED LISTENING EXPERIENCE - Dual volume controls for personalized sound zones.

The Facmogu299 4.1CH Bluetooth Power Amplifier delivers a powerful 800W RMS output, designed specifically for high-capacity speakers and active subwoofers. With advanced Bluetooth 5.0 connectivity, dual volume controls, and a user-friendly remote, this amplifier ensures a tailored audio experience for any setting, all while maintaining crystal clear sound quality.

Specifications

ASIN	B097C6BLHY
Best Sellers Rank	#117,052 in Electronics ( See Top 100 in Electronics ) #756 in Audio Component Amplifiers
Brand Name	Facmogu
Customer Reviews	4.1 4.1 out of 5 stars (624)
Manufacturer	Facmogu
Material Type	Plastic, Metal
Maximum Supply Voltage	12 Volts (DC)
Minimum Supply Voltage	12 Volts (DC)
Model	A18301-MG-US
Mounting Type	Surface Mount
Number of Channels	4
Output Power	800 Watts
Package Type Name	box
Specification Met	Internal/Unspecified Industry Standards
Voltage	12 Volts
Warranty Description	1 Year Warranty

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