Size & Weight



Amplifier Type
Digital Amplifier, S-Master
Amplifier Channels
Power Output (Total)


Subwoofer Type


Input and Output Terminals
Optical-audio input, USB type A (only for update)
RX (receiver)
Bluetooth version


Number of Input/Output
- / 1(ARC)

Audio Formats

HDMI input
Dolby Digital, Dolby Dual mono, LCPM 2ch
Optical Input
Dolby Digital, Dolby Dual mono, LCPM 2ch

Sound Function

Sound Mode
Sound Field
Sound Effect
Night Mode, Voice Mode
Virtual Surround Technology
S-Force PRO

Speaker Layout

Speaker Structure
2.1ch(wireless Subwoofer)

Wireless Features

TV Wireless connection


Power Consumption
BAR 35W / SW 20W
Power consumption(on QuickStart mode)
BAR 0.5W / SW 0.5W

What's In The Box

  • Batteries for remote commander
  • Instruction Manual
  • Optical Cable
  • AC Cable
  • Quick Setup Guide
  • Remote Control


A family in a living room watching TV – blue sound waves are emanating from the soundbar and subwoofer

Hear sound come from all around

The soundbar couples high-quality Dolby® Digital with S-Force PRO Front Surround, our virtual surround sound technology. It puts you right at the heart of the movies you love by emulating cinema style surround sound.

Graphic showing how S-Force PRO Front Surround delivers virtual surround sound using front speakers only

Surround made simple

Using front speakers only, Sony’s unique digital sound field processing technology virtually reproduces the surround sound field, with audio coming at you from both sides. You can enjoy rich, cinematic surround sound.

Blue sound waves emanating from a soundbar on a cabinet underneath a wall-mounted TV

Enjoy clear dialogue and powerful sound

Powerful speakers work together to deliver wide-ranging sound throughout your room, with technologies such as the X-Balanced Speaker Unit and Separated Notch Edge on the speaker unit helping to enhance vocal clarity. So whether you’re watching movies or TV, you won’t miss a word of dialogue.

Comparison of unique rectangular shape of X-Balanced Speaker Unit with conventional speaker

X-Balanced Speaker Unit

Front speakers feature an X-Balanced Speaker Unit. The unique rectangular shape of these speakers maximises the diaphragm. It reduces driver excursion while maintaining sound pressure, resulting in less distortion and greater vocal clarity.

Three-quarter view of  wireless subwoofer

Deeper, richer bass sound

A powerful wireless subwoofer with a large 160mm speaker unit delivers a deeper, richer bass sound.

Close-up of the Separated Notch Edge on the X-Balanced Speaker Unit

Separated Notch Edge 

The Separated Notch Edge on the X-Balanced Speaker Unit improves vertical amplitude symmetry, an essential for clear sound quality. It achieves this using strategically placed cuts on the edge, which help to control the stress inside and outside the edge of the diaphragm.

Illustration showing a TV, soundbar and subwoofer connected wirelessly

Easy wireless connection

To minimise cable clutter, you can send audio wirelessly to your soundbar from a Sony BRAVIA TV supporting wireless connection. The wireless connection also lets you turn your TV and soundbar on and off simultaneously using the BRAVIA power button. And it frees up a Bluetooth® input for another input source such as a smartphone or tablet.

Image of a hand operating a remote control

Comfortable control

A simple new remote control combines pleasing, hand-fit design with easy, intuitive operation. Convenient features include dedicated buttons for adjusting the volume and sound settings.

Remote control for HT-S400 soundbar and wireless subwoofer

Simply select your sound 

The soundbar offers a choice of sound settings to suit whatever you’re watching or listening to. There’s Voice mode for clearer dialogue, Night mode for when you want to watch TV without waking the house, and Sound Field, which converts conventional soundtracks such as stereo audio into a surround sound experience. 

Viewer's POV of a wall-mounted TV and soundbar in a living room

Stylish, wall-mountable design

Designed to blend seamlessly into your living room, the wall-mountable soundbar has a flat back that fits perfectly flush to the wall.

Close-up on the soundbar's OLED display window, showing TV as the input source

Convenient OLED display window

An OLED display window on the soundbar offers at-a-glance status information on remote control functions including input source, volume, and sound settings such as Sound Field, Voice mode and Night mode.

Screenshot showing soundbar settings on the BRAVIA TVs Quick Settings menu

Effortless control with BRAVIA TVs

With an integrated UI, soundbar settings automatically appear on the BRAVIA TVs Quick Settings menu for easy control of sound settings and volume.

Logo for HDMI


HDMI ARC (Audio Return Channel) lets you connect to compatible TVs with a single cable, reducing cable clutter.

Logo for Bluetooth®

Play the music you love

It’s not all about movies and TV – you can easily play your favourite music through your soundbar too. Use Bluetooth® technology to wirelessly stream music from your smartphone, tablet or laptop.

Close-up showing the HDMI ARC and optical input at the rear of the HT-S400 soundbar

Set up in seconds

With a choice of HDMI ARC and optical input, it’s easy to connect the soundbar to a range of TVs – so you can get on with enjoying your movies, music and more.

Illustration of optical input

Optical input

TV not compatible with HDMI ARC? Enjoy high quality sound for movies and more when you connect to the optical input.

Three dishes displaying a variety of materials

Sustainability in mind

Our products are designed not only pursuing sound quality but also considering the environment. Sony’s originally developed recycled plastic is used in the sub-woofer rear panel of the HT-S400, reflecting how Sony strives to reduce the environmental impact of our products.

Learn about recycled plastics