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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S-299 4.1CH Bluetooth Power Amplifier with Active Subwoofer Output Max 800W RMS 40Wx4 Subwoofer Amplifier Hi-Fi Integrated Mini Speaker Amp Audio Sub Bass Amp Remote Control & 12V Power Supply

Product ID: 554417562

Details

Voltage
12 Volts
Manufacturer
Facmogu
Maximum Supply Voltage
12 Volts
Minimum Supply Voltage
12 Volts (DC)
Mounting Type
Surface Mount

📶Bluetooth 5.0 with 30ft range

🔊4x40W RMS output

🎛️Dual volume & bass/treble control

57.83 OMR

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Description

🎵 Elevate your soundscape — command every beat with precision and style!

DUAL ZONE VOLUME CONTROL - Independently adjust two speaker groups for perfect sound balance in any space.
POWERFUL 800 W RMS OUTPUT - Drive 2 pairs of 40W speakers plus an active subwoofer for immersive sound.
EFFORTLESS REMOTE LED CONTROL - Fine-tune bass, treble, and volume from anywhere with a sleek remote and bright LED display.
SEAMLESS BLUETOOTH 5 0 CONNECTIVITY - Stream your favorite playlists wirelessly up to 30ft with crystal-clear audio.
HI FI CLARITY WITH ULTRA LOW DISTORTION - Experience sharp, distortion-free music with less than 0.04% harmonic distortion.

The Facmogu S-299 is a compact 4.1 channel Bluetooth power amplifier delivering a total peak output of 800W RMS. Designed for audiophiles who demand clarity, it features Bluetooth 5.0 for wireless streaming, dual volume controls for multi-zone audio, and dedicated bass/treble adjustments. Perfect for powering two pairs of 40W speakers alongside an active subwoofer, it ensures distortion-free, high-fidelity sound with convenient remote operation and a bright LED display.

Specifications

Voltage	12 Volts
Manufacturer	Facmogu
Maximum Supply Voltage	12 Volts
Minimum Supply Voltage	12 Volts (DC)
Mounting Type	Surface Mount
Brand	Facmogu
Number of Channels	4
Output Power	800 Watts
Package Type Name	box
Specification Met	Internal/Unspecified Industry Standards
Material	Plastic, Metal
Model number	A18301-MG-US
Colour	S-299 (40Wx4 + Active Subwoofer)
Item Weight	962 g
Package Dimensions	27.2 x 20.8 x 6.71 cm; 962 g
Item model number	A18301-MG-US
Output Wattage	800 Watts
Power Source	corded electric
Are batteries included?	No

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57.83 OMR

Duties & taxes included

In stock

Sold byAmazon OMANDelivered 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 OMAN.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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