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High-Resolution audio system with headphone amp

Model # CAS1

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The Way The Artists Truly Intended

Enjoy the subtlest nuances of studio-quality sound in higher than CD quality with High-Resolution Audio. Passion for music unites every component from signal to speaker so it feels like the artist is performing right in front of you.

Rediscover your favorite music

The CAS-1 audio system featuring dual-amps and separate speakers accurately recreates original sound spaces for immersive High-Resolution Audio experiences through speakers or headphones. Every subtle note of your favorite music fills your space in exquisitely rich detail, even at low volumes. Also, you can enjoy easy high-quality Bluetooth audio streaming from your devices.

Enjoy chill-inducing sound quality

High-Resolution Audio reproduces every breath, drumbeat, and note, and the S-Master HX all-digital amplifier reduces distortion to deliver a recording studio experience on your tabletop.

Enhancing your existing music

DSEE HX upscales existing sound sources to near high resolution sound quality, making you feel as if you are really there at the recording studio or concert.

Two High-Resolution Audio experiences

High-Resolution Audio through separate speakers or headphones

Independent speaker and headphone amps deliver High-Resolution Audio through separate speakers or headphones.

Hear each note with incredible clarity

High-Resolution sound quality through speakers or headphones

Independent amplifiers eliminate added resistance, allowing for sound that is much closer to the original on both headphones and speakers.

Place yourself center stage

Dynamic acoustics create rich soundscapes

Experience your music with live performance richness through stereophonic sound reproduction that recreates the original sound space. Separate speakers distinctively create sound and improve directionality for immersive listening experiences, even in small spaces.

Easily achieve the best listening position

Easily position speakers for best listening point

Place separate speakers 30-80 inches away for optimal listening position. Included brass spikes let you adjust the speaker angle, and included speaker bases provide stable acoustics on any surface.

Immersive soundscapes at any volume

The CAS-1 main unit and separate speakers are designed to recreate original sound spaces, delivering tabletop near field listening, even at low volumes.

Uncompromised richness at any volume

Technologies like Pulse Height Volume and Low Volume Mode ensure dynamic audio response even where other digital amplifiers suffer, at low volumes.

Enhanced headphone listening

Enjoy higher quality listening on various headphone types

A high grade amplifier drives the sound for both in-ear and over ear headphones. CAS-1's dedicated headphone amp and separate high-end DAC adjusts output for more isolated headphone listening experiences. Use the dedicated headphone gain toggle switch to match impedance to headphone type to enhance the listening experience for headphones of varying impedance.

Easy connections for wireless streaming

Wirelessly connect mobile devices to the separate speakers for convenience and improved sound. Stream your music with detail and clarity using Bluetooth and high-quality LDAC audio codecs.

High quality wireless audio streaming

LDAC is a new audio technology from Sony that allows you to enjoy high quality wireless audio via Bluetooth®. Transmitting up to three times more data, LDAC produces an enhanced wireless listening experience for all your music.

Designed for your space

Stylish compact separate speaker design for near field listening lets you enjoy high-quality sound in small spaces, leaving plenty of room for work, study, and play. Easily position the powerful compact speakers for the best possible listening experience.

High-quality circuitry

The rigid frame and beam chassis houses two separate circuit boards for the independent S-Master HX amplifier for speakers and the DAC + amplifier for headphones.

Designed for clarity

Compact separate speakers for near-field listening. Housed in specially painted high-grade cabinets, the separate CAS-1 speakers create an ideal acoustic field on your tabletop.

Connect your music devices

Easily play your music from wherever it is.

Connect your PC, Walkman, Xperia smartphone or tablet via USB for High-Resolution Audio. Easily connect music devices with one touch to wirelessly stream music with detail and clarity via NFC + Bluetooth® and LDAC. A new audio technology from Sony delivering high quality wireless audio via Bluetooth®, LDAC is part the wireless audio performance solution, delivering exceptional listening.

Unite your music

Easy streaming control with the SongPal app

The SongPal app allows you to easily and intuitively manage your listening experience. Simply install the SongPal app on smartphones to take control of music playback and device settings in one app.

The Heart Behind the Sound System

Sony audio engineer Kasumi Miyamoto shares her passion for sound and the technology behind the CAS-1 Compact Audio System.

Award winning design


The CAS-1 was granted the world-renowned seal of design quality by a jury of 60 experts, at the 2016 iF DESIGN AWARD.


  • From source to speaker, Sony has brought together an array of technologies for the ultimate audio experience. For High-Resolution Audio files, the digital amp and specialized tweeters reproduce every subtlety, so you can hear each note as the artist intended.
  • Take your audio experience beyond CD quality. DSEE HX builds on our proprietary DSEE technology, upscaling compressed audio files to a level closer to High-Resolution Audio. By restoring the subtleties of original recordings lost during the compression process, DSEE HX delivers a rich, studio-quality audio experience for all your music.
  • The CAS-1 recreates original sound spaces from recording studio or live performance venues, giving you the live performance experience. Enjoy music playback that reveals that unfiltered sound the artists wanted you to hear.
  • Two distinct amplification systems deliver outstanding High-Resolution Audio experiences the way you like to listen. The compact chassis houses two independent circuit boards for the speaker and headphone amps. Headphones and speakers have distinct amplification requirements due to their differing power outputs and proximity to the drivers. The full digital S-Master HX amplifier drives the separate speakers, reproducing dynamic and powerful sound despite its compact design. The headphone amp and separate high-end digital-analogue converter is a better solution for the isolated headphone listening experience, driving headphone sound powerfully yet precisely.
  • The CAS-1 boasts a reinforced chassis frame (outer surface and frame) and beams designed to prevent damage to the casing and circuit board and enhance sound quality. The base structure uses a combination of high-end components and sheet metal to deliver high precision. The aluminum die-cast panel provides high rigidity and low resonance, placing minimal strain on the substrate when mounted. It optimizes heat flow away from components, enhancing both sound quality and miniaturization.
  • This newly designed full digital amplifier is the product of over ten years of Sony digital amplifier technology development. Through a major overhaul of the noise shaper and power circuit, we achieved substantial noise reduction for high-purity playback and subtle information detail unique to High-Resolution Audio.
  • The CAS-1 maintains the original audio detail at lower volumes for dynamic audio even in confined spaces. Common digital amplifiers (right) shred the original music data at low volumes. Pulse height volume (left) adjusts the power supply voltage to maintain high-density sound data at low volumes. Pulse height volume reduces power supply noise (dotted red line) at low volumes, producing a cleaner sound than common digital amplifiers.
  • Conventional compact tabletop speakers frequently lose the treble/bass balance of the original sound at lower volumes. Low Volume Mode optimizes these properties, reproducing the faithful balance of the original sound at low volumes.
  • Recording engineers position their left and right speakers to form an equilateral triangle for optimal audio monitoring. The CAS-1's near-field design lets you reproduce this layout at home for ideal stereo sound imaging.
  • Harder and lighter than fiberglass, high-rigidity carbon fiber cones combine with a powerful magnetic circuit to generate tight, powerful bass. The CAS-1 main unit is housed in a molded frame to lessen distortion, suppress unit vibrations, and create high-quality sound.
  • The wide flare on the bass reflex port reduces duct noise so that the bass remains tight and free of distortion, even close to the speakers.
  • The soft dome tweeters feature a wide-dispersion design specially developed for reproducing the ultra-high frequency audio in High Resolution Audio formats. Enjoy the added realism from reproducing subtle harmonics and sound textures not possible with conventional tabletop speakers.
  • A half-inch-thick MDF baffle board effectively stops vibrations, and birch plywood on the wrap board brings out beautiful controlled acoustic harmonic vibration. Braces reinforce the enclosure, and sound-absorbent material controls enclosure vibrations. Even the paint is specifically chosen to further suppress unwanted harmonic vibration in addition to providing a stunning gloss appearance.
  • Adjust the speakers to an 8 upward angle to ensure sound quality when the listener is seated 2.5 to 6.5 feet away. We designed the CAS-1 speakers to deliver better sound straight to your ears when tilted into optimal position, without unwanted reflection or interference.
  • The CAS-1 audio system includes exclusive speaker accessories specially designed to avoid interference and deliver High-Resolution Audio in the near field-the area between 2.5 to 6.5 feet from the separate speakers. Install the included brass spikes to angle speakers upward an ideal 8 ° to deliver sound straight to your ears, and the included 1/4" thick steel speaker base attachments to mitigate excess reflection. These easy-to-install accessories allow you to achieve excellent acoustics in small spaces without troublesome adjustments. The CAS-1 includes everything you need to enjoy original sound space on your tabletop. Just add your favorite music to create your own soundscapes.
  • CAS-1 uses the same 32-bit high-precision digital-to-analogue converter (DAC) used in Sony's acclaimed HAP-Z1ES High-Resolution Audio player. This DAC extracts High-Resolution Audio detailed sound field information from sound sources in its entirety, producing fuller, richer sound that recreates the original space.
  • For volume control, CAS-1 uses electronic volume (NJW1194 ) with high sound quality. NJW1194 minimizes noise and distortion at low volumes for less deterioration of sound quality. Enjoy high-quality sound faithful to the original sound space, without unwanted distortion.
  • The CAS-1 uses the same excellent headphone amplifier IC used in the high-precision Sony PHA-2 Portable High-Resolution Audio DAC/Headphone Amplifier to drive headphone sound powerfully and precisely. Boasting excellent drive compared to regular operational amplifiers (op-amp), this headphone amplifier can even drive high-impedance headphones to effectively reproduce high-quality sound.
  • No expense was spared in the quest for a pure audio experience on the CAS-1. Instead of a semiconductor switch, we implemented an output toggle circuit that uses a relay with little contact resistance and good sound.
  • The CAS-1 main unit houses a four-layer circuit board that allows for ideal routings for earth and power supply patterns. Component layout is designed with a beautifully symmetrical pattern based on established high-end models for cleaner sound with less noise.
  • Enjoy the best possible sound using your favorite headphones with adjustable gain control. Gain on headphones amplifiers is the maximum amount the amplifier can increase a signal. The CAS-1 features a dedicated headphone gain toggle switch to allow you to match impedance to your headphone type, enhancing the listening experience for headphones of varying impedance.
  • The front side of the CAS-1 features a robust 1/8" mini plug headphone port made from high-quality metal parts. We use quality metal parts to ensure that your headphone jack fits snugly and securely each and every time. This stable connection prevents distortion and delivers uncompromising sound quality. The universal 1/8" mini plug size ensures wide compatibility so you can use the same headphones at home that you use with your Walkman® or smartphone.
  • LDAC is a new audio technology from Sony that lets you enjoy high-quality wireless audio via Bluetooth®. With triple the data transmitted, LDAC provides an enhanced wireless listening experience for all your music.
  • NFC (Near Field Communication) technology removes the need for wired connections and complex setup sequences. Simply touch your NFC-enabled smartphone or other device* to the on-body N-mark and start your music. No NFC" No problem. You can also pair the devices manually in Bluetooth® settings. *See compatible devices
  • Find compatible devices
  • Connect your Walkman® or PC to the rear USB-B terminal to play high-resolution sound sources. Connect Walkman® or USB storage devices to the front USB-A terminal to play high-resolution music using the SongPal app or the included remote control. You can also charge your iPhone or other mobile devices from here.
  • Download SongPal for your smartphone or tablet and take control of your music collection. Simply connect via Bluetooth® and USB. Play music and view track information on a Walkman® or USB mass storage device connected to the USB-A terminal. Also use the app to customize sound settings for great, balanced audio.
Speaker Type 2-way, 2-driver speaker system, Bass reflex
Speaker Size Tweeter: 1/2" soft dome type, Woofer: 2.44 in, cone type
Dimensions (W x H x D) Main Unit: Approx. 2.16 x 7 x 8.25 in; Speaker Unit: Approx. 3.75 x 7 x 6.75 in
Weight Main Unit: Approx. 2.8 lbs (With Battery); Speaker unit: Approx. 3.3 lbs
Input and Output Terminals Headphone Out, Speaker Output, USB A, USB B
Frequency Range 2.4 GHz band (2.4000 GHz - 2.4835 GHz)
Remote Control RMT-AA140UB
Power Consumption 29W (when on) / AC
Power Consumption (Off Mode) not available
Power Consumption (Standby Mode) 0.3 W
Power Consumption (Networked Standby Mode) - Terminals 1.5 W (Bluetooth®)/2.0 W (all terminals and networks connected)
Standby Mode Activated After 15 minutes
Networked Standby Mode Activated - Terminals After 15 minutes (Bluetooth)
Wireless Network(s) On/Off Switch Press and hold (BLUETOOTH®) PAIRING button of the unit simultaneously for more than 4 seconds

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