Thank you very much for purchasing the A3 soundbar.

Please read the instructions carefully before using this product.

Product Specifications
Product Overview & Control Functions
Package Contents​
Quick Steup
Warranty Information
About Fosi Audio

Product Specifications

Thank you very much for purchasing the A3 soundbar.

Please read the instructions carefully before using this product.

If you have any prnblems or suggestions for the product, please contact us via support@fosiaudio.com.

Product name

2.0 Sound bar


Output power



AC/DC adapter



Speaker frequency



Bluetooth version

5.0, A2DP, AVRCP


Bluetooth range

Up to 10m


lncluded in the packaging

Soundbar,Remote control,AC/DC adapter,3.5mm to RCA cable, Line in cable, wall mount brackets, User manual




Package Contents​

1: HDMI (ARC) input

2: USB playback

3: OPT: Optical input

4: LINE IN: 3.5 mm line in

5: DC input

6: Power/Mode switch button

7: Play/Pause/EQ Switch

8: Volume-/Previous track

9: Volume+/Next track

Quick Setup​

Insert 2 pieces of AA batteries to activate the remote control.(battries not included)

1) The remote control works within the range of 6 meters.           
2) TV remote coatcol or other universal remote controls are not compatible with the soundbar.

Note: 1) Please connect it to power before using. 

           2) Short press the “O/M” SOURCE on unit or “O/M” on remote control to turn on the soundbar. The Bluetooth will light up. 

           3) The soundbar will enter the Standby Mode again if there is no operation for 20 minutes. 

EQ Switch:

Double click “▷▌” to switch the EQ.

Note: 1) The default input setting is Bluetooth mode after booting the soundbar. You can click the “O/M” to switch between Line-in input and optical-fiber input mode. (input mode priority order: Bluetooth > Line-in > optical-fiber > HDMI(ARC) 

        2) Press and hold the Bluetooth button on the remote control “▷▌”source button on the soundbar for 3 seconds to remove the Bluetooth connection. 

Optical In Source

  1. Ensure that the soundbar is connected to the TV or other audio devices via an optical cable. 
  2. Press the optical button on the remote control to enter the optical input mode. You can also short press the “O/M” source button on the soundbar to choose the optical source .

Note: The playback is controlled by your device and the button on the remote control. Before use, you need to unplug the cover. 

  1. Short press the button to turn on the “O/M” soundbar, plug your USB flash drive into the USB port and the soundbar will play the music in your  USB flash drive. You can press “⧏” or “⧐” button on the remote control to select your music. 

HDMI(ACR) Source 

Ensure that the soundbar is connected to the TV or other audio devices via an HDMI(ACR) cable. Press the HDMI button on the remote and play. 

Note: The device can synchronize the volume with the TV and also with the switch. 
Wall Mounting Guide


1: Pairing connection via Bluetooth cannot be completed. 

  • Once you connect one device to the soundbar ,the connection will be stored and when you turn on the soundbar the Bluetooth connection will be activated automatically. If you want to connect another device to soundbar you need to disconnect the former connection first by turning off Bluetooth on your former device or clearing the former connection by pressing and holding the Bluetooth button on the remote control for 3 seconds. After that, you can find and connect the other devices. 

2: Why there is no sound output from the soundbar when I connect it to my TV set? 

  • Please make sure that the TV has a audio output interface. 
  • Please set the TV to digital audio output and select PCM output. 

3: The Bluetooth connection is not stable. 

  • There should be some obstructions between the soundbar and your Bluetooth devices which interferes with the connection. Please remove them. 
  • The supported range for Bluetooth connection is around 10 meters indoor. 
  • Please do not exceed that range. 

4: Silent play after connection via Bluetooth

  • After connections with mobile devices, Bluetooth device audio is off. Turn on the mobile’s output volume. 

Warranty and Maintenance

All Fosi Audio products have an 24-month limited warranty on parts and labor from the date of purchase. Please contact us if you have any problems.

About Fosi Audio​

• Fosi Audio designs and builds innovative audio products with all your music in mind. Great sound, simple but elegant designs, high-quality materials, and truly useful features are what Fosi Audio is about. We sincerely hope you get as much enjoyment from our products as we’ve had to create them!

Our website: www.fosiaudio.com

Amazon store: www.amazon.com/fosiaudio 

Our Youtube channel: Fosi Audio

Our Facebook page: Fosi Audio

WhatsApp: +8613716612254

Call us: +49 33389171782

After-sale Service and Technical Support Email:  support@fosiaudio.com