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S1 EVO: Ultimate Sound Evolution, Unmatched Analog Perfection.

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Sophisticated Realism

S1 EVO: Ultimate Sound Evolution, Unmatched Analog Perfection.​

Setting a new benchmark for the Ultimate Audiophile Experience.

XACT S1 EVO elevates digital audio playback with its precision-engineered Master OCXO Clock, in-house developed ceramic-aluminum isolation footers and an upgraded internal music drive cable, delivering an even more refined listening experience.

Created by Marcin Ostapowicz, the founder of JCAT and JPLAY brands and author of some of the most innovative high-end audio products, including the world’s first audiophile network card.

Natural, organic
& sophisticated sound

Immersive, emotionally resonating experience

High-class, seamless user experience

Developed from the ground up for 6 years

Through the S1 EVO I could hear absolutely everything and was sucked into the sound… more than any previous listening session of this same music !

Read more

Chris Connaker, 
The Computer Audiophile

AudiophileStyle

Digital that doesn’t sound like digital. More like vinyl. Or a private concert.

XACT S1 delivers on my vision of audiophile sound: natural, organic with analog sophistication and lifelike imaging. It’s hard to believe it’s digital.

Any rest of “digital” sound is gone. (…) Voices have a texture and energy that is incredible. The immediacy of the piano attack is so real as never before. And so on…

If you have the sound of a nearly perfect vinyl setup as a reference in your ears, you should try the XACT S1. That is what I can say tell you with a clear conscience.

Thomas, Austria

The music comes out of a dark invisible background. More dynamic, richer tonality and clean. Bass is deep and articulate. Imaging seem more 3D in space. (…)
The XACT sounds like analog, is how I can best describe it, but without the analogue limitations.

Celebrat, United States

What impressed me the most, compared to the other two streamers, was the realism of the reproduction. This mix of richness of timbre and definition, which I had never experienced before, never falls into an analytical effect that quickly becomes tiring.
It was like the XACT S1 created a emotional human connection between the music and the listener.

Chupi, France

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Now available in the “EVO” model for even higher sound quality.

Master OCXO Clock.

The Master OCXO Clock in the XACT S1 EVO represents a significant upgrade in digital audio performance, drawing on advanced clock technology similar to that found in high-end audio clocking systems. This clock module is entirely developed in-house, emphasizing precision and stability, which are critical for achieving exceptional sound quality. The result is a digital audio playback that captures every nuance with remarkable clarity.

PHANTOM™ Music Drive Cable.

By utilizing the same cutting-edge materials and precision construction techniques as our new PHANTOM™ USB and LAN cables, the PHANTOM™ Music Drive Cable minimizes signal interference and preserves the purity of the audio signal. This results in a listening experience that is not only more detailed and lifelike but also imbued with a richness and depth that brings music to life in the most natural and engaging way possible.

IMMOTUS™ mechanical isolation.

The IMMOTUS™ ceramic-aluminum isolation footers, introduced in the XACT S1 EVO are the culmination of years of research and a deep passion for enhancing sound quality.

Internal vibrations generated by audio components can be  more detrimental to sound quality than external ones. Standard feet made of soft damping materials often fail to address this issue. This understanding led us to develop IMMOTUS™ footers, designed to effectively channel these vibrations away.

IMMOTUS™ is more than just a component. By utilizing aerospace-grade aluminum and ceramics, we’ve engineered a product that not only enhances detail and resolution but also provides deeper and more precise bass.

It’s not just about a sleek, minimalist design; it’s about creating a tool that truly elevates the listening experience to a whole new level. Our goal was to craft isolators that not only look great but deliver incredible sonic value to our customers.

PHANTOM™ Music Drive Cable.​

By utilizing the same cutting-edge materials and precision construction techniques as our new PHANTOM™ USB and LAN cables, the PHANTOM™ Music Drive Cable minimizes signal interference and preserves the purity of the audio signal. This results in a listening experience that is not only more detailed and lifelike but also imbued with a richness and depth that brings music to life in the most natural and engaging way possible.

Designed and developed from square one. Fine-tuned by ear. Obsessively.

Not an another PC.

A completely new device.

Most streaming products available today are made with standard, ready-to-use mini-PC motherboards designed for office or home entertainment. However, these motherboards have noisy power converters that interfere with other hi-fi components and produce an irritating “digital” sound. Some companies try to mitigate the issue by upgrading their power supplies, but this doesn’t address the root cause. That’s why developing an entirely new motherboard from scratch with only audio playback in mind was the only way to go with XACT S1.

100% linear power delivery.

Truly everywhere.

It’s the first music server that puts so much emphasis on power quality ever. The motherboard itself has only linear regulators and runs solely on linear power. The dedicated power source is 100% linear without any switching components. XACT S1 delivers unmatched electrical performance. There’s nothing else like it.

Extensively ear-tested with every tweak

Hardware and software in harmony. The definition of synergy.

Over more than 10 years of developing JPLAY,
I’ve learned firsthandedly that the software has as much impact on the sound quality as the hardware platform itself. Through meticulous testing, I’ve explored all possible optimizations of the operating system and player’s code, ultimately identifying the most harmonious combination for the S1’s hardware.

XACT OS written from scratch and optimized for the hardware

Fine-tuned by ear with every minor change. For years.

I’ve done extensive listening on S1 every time I tweaked something. Every minor change was tested and logged by me personally. Every hardware component, every OS update, every modification of settings.

XACT OS written from scratch and optimized for the hardware

Extensively ear-tested with every tweak

High-class everything. Not only the sound.

Excellent user experience is something that the high-end category essentially lacks. I believe that high-end shouldn’t be just about the top sound but the entire listening experience.

1-click setup.

The simplest.

Simple as it can be.

Just click the button.

One app to rule them all.

Effortless management and discovery with JPLAY™ app.

JPLAY™ app brings unrivaled convenience of managing your library and new music discovery.
  • Streaming & local files accesible in one place
  • Native Tidal & Qobuz discovery features
  • Extended playlist management
  • Advanced search and sort
  • Aggregated activity stats
  • Multiple library views
  • …and many more!
LIFETIME SUBSCRIPTION INCLUDED
JPLAY™ app brings unrivaled convenience of managing your library and new music discovery.
  • Streaming & local files accesible in one place
  • Native Tidal & Qobuzz discovery features
  • Extended playlist management
  • Advanced search and sort
  • Aggregated activity stats
  • Multiple library views
  • …and many more!
LIFETIME SUBSCRIPTION INCLUDED

1-click setup.

The simplest.

Simple as it can be.

Just click the button.

Connection setup
 XACT S1 as a music server / player

basic setup

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Connection setup
XACT S1 as a a network switch / router + S1 as a music server / player

dual setup for best sound quality

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Only the finest components.
Obsessive attention to details.

Every component in XACT S1 EVO is hand-picked or developed from the ground up and thoroughly tested by ear. No other company has gone to such lengths in music server design.

MASTER OCXO CLOCK
For even higher sound quality

Nichicon Muse flagship capacitors delivering exceptional resolution and natural sweetness

IMMOTUS™ mechanical isolation

phantom™
music drive cable

Industrial-grade SSD
carefully selected for its unique sound properties

Extremely resistant OS SD card developed for military conditions

Easy music importing from usb drives and over network

Audiophile network switch & router
(alternative functionality)

  • 100% custom motherboard developed exclusively for high-end music playback (world’s first 100% linear powered motherboard)
  • OPTIMO™ X1 linear power supply section delivering 140 000 uF
  • master ocxo clock board
  • IMMOTUS™ mechanical isolation
  • PHANTOM™ Music Drive Cable
  • Digital outputs: 2x USB Audio 2.0 (main and without 5V power bus) via gold plated high durability EMI shielded USB connectors
  • Specially selected 4TB SSD drive for audio performance (8TB capacity available on request)
  • LAN inputs: 6x Gigabit Ethernet for audiophile network switch & router (alternative functionality) S1
  • Gold plated high durability EMI shielded RJ-45 connectors with built-in 12-core transformers for improved isolation
  • LED-off feature for LAN ports to counteract noise
  • Chassis made of aluminum; fanless design
  • Custom made XACT OS™ loaded from a specially selected SLC SD card
  • JPLAY™ playback software supporting TIDAL & Qobuz streaming services and local files (from internal SSD)
  • Native bit-perfect playback for DSD up to DSD512 & PCM hi-rez up to 768 kHz, 16-32 bits
  • Supported file types: DSD: DSF, DFF, PCM: FLAC, Apple Lossless (ALAC), WAV, AIFF; Lossy: MQA (pass-through)
  • Remote control: JPLAY™ iOS app (lifetime license included)
  • Dimensions (W x D x H): 439 x 315 x 100 mm
  • Weight: 10 kg
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