Life-Changing
3D Surround Sound

The sound resonates near your ears,
behind you, and in the distance.

animation

WOOFER

50mm Woofer
(Low Frequency driver)

MIDRANGE

25mm Mid Range
(Mid Frequency driver)

TWEETER

20mm Soft Dome Tweeter
(High Frequency driver)

Passive Radiator

Passive Radiator for Powerful Bass

DSP・6 digital amplifiers

Intelligent Digital Signal Processor
and Powerful 6 Digital Amplifiers

Fully Immersed
like Headphones
Beyond Reality
with Loudspeakers
Life Changing 3D Surround Sound
About the purchase

180Years of Legacy

The reason
why Kajima makes
audio

Since 1845, Kajima Corporation has been involved in the design and construction of numerous renowned music venues. This includes concert halls and theaters which are highly respected both domestically and internationally, particularly their skills in acoustic architecture are exceptional. These halls feature meticulously calculated acoustic designs to maximize the allure of sound, ensuring the audience to experience clear sound at any seat. OPSODIS technology have been used as an acoustic analysis tool to verify how the sound would be perceived after construction. Capitalizing on their extensive experience in acoustic architecture and analysis technology, Kajima Corporation has embarked on a new challenge which was developing the audio product "OPSODIS 1."

Concert halls
built by Kajima

Suntory Hall- 1986 -

Karuizawa Ohga Hall- 2004 -

Cultural Center of Italy- 2005 -

Yamaha Hall- 2010 -

Zepp Osaka Bayside- 2017 -

Tokyo Tatemono Brillia HALL- 2019 -

Zepp Haneda (TOKYO)- 2020 -

K-Arena- 2023 -

Karuizawa Ohga Hall
Zepp Osaka Bayside
Zepp Haneda (TOKYO)
Brillia HALL

These halls are facilities constructed by Kajima Corporation and they do not use OPSODIS speakers.

The numbers indicate the year of completion.

OPSODIS®

Next Gen 3D Sound

The 3D sound technology "OPSODIS®" is a spatial sound reproduction principle jointly developed by Kajima Corporation and the Institute of Sound and Vibration Research, University of Southampton, known for its expertise in acoustics.

OPSODIS delivers an immersive experience and lifelike presence—through this innovative technology.

OPSODIS 1 product image
OPSODIS®

3D Surround Sound,
All from One Device

The sound arrives at both ears at the same time.Detected at the center.
The sound arrives at the right ear earlier.Detected on the right.

Humans can receive spatial information through their ears such as direction, distance, and magnitude of sound sources.
For example, they sense the direction of the sound by detecting the slight difference in arrival time between the left and right ears.

OPSODIS 1　Each sound remains distinct and clear
Stereo speakers　The sound becomes muddled

To create a truly immersive 3D sound experience, it's essential to independently control what each ear hears. That’s exactly what OPSODIS makes possible.
It delivers precise and clear audio—just like headphones—so there’s no need for an expensive multi-speaker system throughout the room.

Cross-Talk Cancellation

If you want the sound to be heard only in the left ear

Simple crosstalk cancellation makes it possible to deliver natural and high-quality sound.

Virtual Speakers

Institute of Sound and Vibration Research at the University of Southampton

Based on detailed analysis at an anechoic chamber, OPSODIS 1 controls the transmission characteristics from the soundbar to the listener’s ears in order to accurately reproduce the sound from all directions.

3D Audio Database

Big data related to 3D sound

Based on the precise and large scale database accumulated by OPSODIS Limited over 20 years,
it utilizes the Head-Related Transfer Function from loudspeakers to the human ears and which adapts to a wide range of audio content.

Life with
OPSODIS 1

Audio experiences in movies, concerts, and video games will be elevated to a new level. In action films, gunshots and explosions come from all directions, while in horror scenes, eerie sounds are heard from behind heightening the suspense.

Even when watching movies on subscription services, your living room will turn into a space filled with the immersive atmosphere like a movie theater.

This device reproduces the spatial information inherent in the audio source. Audio sources with binaural recordings or content produced in surround sound format, as well as spatial audio, have a high degree of 3D effect reproduction.

Loudspeaker
Architecture

6-Channel Multi-Amp

OPSODIS 1 uses a high-performance floating-point DSP and dedicated amplifiers for each frequency band, enabling precise sound separation and optimal speaker performance.
Full digital signal processing ensures zero signal degradation.

animation

OPSODIS Engine

High-performance digital filters, crosstalk cancellation, and frequency division to the amplifiers are enabled through the high-performance floating-point DSP. Moreover, there are 6 dedicated digital amplifiers equipped for 6 driver units.

This ensures highly accurate frequency band division and precise driver control that formulates 3D sound reproduction.

Frequency-Tuned Driver Unit Placement

By placing the "Tweeter" (high-frequency) at the center of the speaker, the "Mid Range" (mid-frequency) further out, and the "Woofer" (low-frequency) furthest away from the center, it accurately controls the sound wave across all frequencies. This unique speaker layout is referred to as "Optimal Source Distribution".

Rigid aluminium body

The body incorporates 5mm thick rigid extruded aluminium material.
By minimizing superfluous vibrations, this creates high-quality sound synthesis and clear spatial effects.

3 Sound Modes

Adaptive Modes for Every Scenario

OPSODIS 1 enhances spatial sound in near-field environments like desktop setups, delivering immersive audio for movies, music, video games, and sports. Gunshots explode from all directions, crowd cheers will surround you, and eerie sounds creep from behind—turning your space into a truly immersive world.

Choose from three modes—"Narrow," "Wide," and "Simulated Stereo"—to suit your environment and listening style.

SOUND 1.Narrow
mode

The optimal mode for use in near-field environments such as desktops.
The speaker is placed approximately 60 cm from the listener’s head, with an elevation angle of about 60 degrees for the clearest localization.

SOUND 2.Wide
mode

The 3D effect becomes slightly softer and the soundstage expands, which makes it ideal for watching TV or for viewing by 2-3 people at a distance of approximately 1.5 meters.

SOUND 3.Simulated
Stereo
mode

Simulates and plays back standard LR stereo sound at an expanded sound stage compared to the width of the speaker.

When using a large-screen TV or projector with a viewing distance of more than 1.5 meters, it is recommended to place OPSODIS 1 in a near-field location such as table in front of the listener

Diverse
Connectivity

Whether on TV or on a smartphone

In addition to connecting via Bluetooth with smartphones and TVs, OPSODIS 1 supports a wide range of connection methods including optical digital, USB-C, and analog connections. This allows seamless integration with a variety of devices such as smartphones, tablets, TVs, gaming consoles, and computers.

Tailored to Your Needs

Bluetooth

smartphones, tablets, and laptops.

Easy and seamless pairing with a wide range of devices such as smartphones, tablets, and laptops.
It supports SBC and AAC audio codecs, allowing you to enjoy clear sound with minimal latency.

Optical Digital

televisions, Blu-ray players, and video game consoles.

The optical digital connection is a method for transmitting high-quality digital audio signals from devices such as televisions, Blu-ray players, and video game consoles.

USB-C

PC speaker

The USB connection allows you to connect to computers and smartphones without quality loss, enabling you to use it as a PC speaker.

Analog
(3.5mm Mini Jack)

analog outlet

You can connect to various other devices with the analog outlet.

Compact &
Sleek Design

Whether on TV or on a smartphone

A compact design that fits in any location with a sophisticated, simple design that blends with your interior. To make your experience with OPSODIS more exciting and fulfilling, we have achieved a compact size of 38.2 cm in width, making it ideal for desktop use.

Compact Size & Sophisticated Design

24inch monitor
55inch tv
soundbar

YouTube Reviews

All videos are PR review videos by Kajima Corporation

Segorita the 3rd
( Japanese Version )
GREEN FUNDING Official Channel
【GREEN New Gadget】
( Japanese Version )
Mikasu-Channel
( Japanese Version )

Testimonials

In alphabetical order

Jun Akiyama / Film Director

Notable Works: "20-Year-Old Soul," "Photo Studio That Writes Tomorrow"

When I first experienced the miracle of the sound produced by this compact speaker, a whole new world appeared before my eyes. It was like sitting in the middle of a movie theater, hearing the powerful sound at high volume, or experiencing the immersion as if I were wearing headphones. Both were rivalled by this new sound that can be delivered right on your desktop. It truly feels like a miracle to me. I have great respect for the development team who challenged conventional wisdom and achieved this remarkable feat. Tonight, I just want to indulge myself in a movie with OPSODIS.

Jun Akiyama

Edison / Composer, Arranger, Music Producer, and Shinobue Flutist

Provided compositions for artists such as Masafumi Akikawa, Miyuki Nakajima, Shogo Hamada, and Taro Hakase.

For many years, I have been exploring the possibilities of music in spatial audio. Encountering OPSODIS 1, it not only liberated me from headphones and enabled the expression of deeply immersing in sound, but it also convinced me that this device liberates music and transforms the very essence of sound which will lead us to a significant cultural revolution.

Edison

Shota Kageyama / Composer

Notable Works: Pokémon series, etc.

I am truly amazed and excited that a surround environment, which even conventional soundbars could not achieve, is realized within such a compact size. I was also surprised by the powerful and impactful bass sound produced by a speaker of this size. Additionally, the simple design that blends well with any interior is wonderful.

Shota Kageyama

Yuki Hayashi / Composer

Notable Works: My Hero Academia, Haikyuu!!, etc.

This new surround speaker made me feel like I was spacewalking through sound! It takes the listener to the uncharted realm of audio. I could not believe that this sensation of music spreading throughout the room was coming from such a small body. I will use this exciting acoustic experience to create my new works.

Yuki Hayashi

Ryo Yoshimata / Composer and Arranger

Notable Works: Atsuhime, Gou: Hime-tachi no Sengoku, Dr. Koto's Clinic, Onihei Hankacho, etc.

Unimaginable from its compact size, sitting in front of it offers a first time experience of 360-degree spatial audio with an immersion beyond imagination. This 'OPSODIS 1' is such an attractive speaker that makes me eager to experience the soundtracks of the movies and dramas I have composed.

Ryo Yoshimata

Color & Design

Black
Silver

Product Details

Product Name
OPSODIS 1
Number
2 channels
Supported Audio Format
SBC, AAC, Linear PCM
Configuration
50mm Woofer x 2
25mm Mid-range x 2
20mm Tweeter x 2
Passive Radiator (57mm x 84mm) x 2
Frequency Response
55Hz~20kHz (-6dB)
Power Supply/AC Power Adapter
Input：AC100～240V(50Hz/60Hz)
Output：DC16V　4A
Standby Power Consumption
under 0.5W
Input Options
Bluetooth (SBC/AAC) /
USB-C /
Optical Digital /
Analog 3.5mm
Wireless Connectivity
Bluetooth Version 5.0
Bluetooth Profiles A2DP1.2, AVRCP1.5
Accessories
・AC Power Adapter
・User Manual
Dimensions &emp; Weight
External Dimensions (W x H x D)
382mm x 80mm (including 10mm rubber feet) x 130mm
Weight 2.3kg
Package Dimensions (W x H x D)
430mm x 165mm x 190mm
Package Weight (Total Weight) 3.1kg