Cyrus 40 ST Music Streamer Featuring BluOS

Cyrus 40 ST Streaming Music Player

The Cyrus 40 ST is a state-of-the-art streaming music player engineered for audiophiles who want top-tier digital playback with elegant ease of use. Encased in the precision-milled aluminum chassis of the 40 series, the 40 ST delivers high-resolution streaming with bit-perfect performance, all while blending seamlessly into any modern listening setup. Whether you're building a new system or upgrading your digital front-end, the 40 ST serves as the ideal streaming companion to the 40 AMP or any high-performance integrated amplifier.

Key Features

• BluOS Streaming Platform: Seamless access to over 20 streaming services with 24-bit/192kHz resolution
• Custom DAC Implementation: ESS Sabre ES9039Q2M with HyperStream IV Dual DAC topology
• High-Resolution Support: Up to 24-bit/192kHz PCM playback, with MQA decoding
• Roon Ready: Fully certified with Roon’s built-in streaming technology
• AirPlay 2 Integration: Whole-home playback via Apple ecosystem
• Flexible I/O: Optical, coaxial, USB-A, Wi-Fi, and Gigabit Ethernet connectivity
• PSU Upgradeable: Compatible with the 40 PSU external power supply
• Modern User Experience: Intuitive app control via BluOS or included remote
• Made in the UK: Handcrafted in the UK

Digital Performance

Cyrus’s approach to digital music is rooted in total control of signal integrity. Inside the 40 ST, a customized implementation of the ESS Sabre ES9039Q2M DAC ensures precise conversion of your digital files up to 24-bit/192kHz. The PCB layout and analog output stage are optimized for ultra-low noise and exceptional musical transparency. This isn’t just spec-chasing — it’s a finely tuned system engineered to extract emotional nuance and depth from every stream.

BluOS Streaming

With native support for services like Qobuz, TIDAL, Spotify, and Deezer, BluOS provides a responsive, elegant platform to manage your entire digital library. Whether streaming from the cloud, your network drive, or a local USB device, the 40 ST handles playback effortlessly. The BluOS Controller app makes setup and playback intuitive, while multi-room playback is just a tap away.

Roon Ready

The 40 ST is fully Roon Ready out of the box. That means plug-and-play access to bit-perfect streaming, multi-room synchronization, and rich metadata without any configuration. If you’re serious about cataloging and curating your music library, Roon plus the 40 ST is a dream team.

AirPlay 2

Apple users benefit from full AirPlay 2 support. Send audio from your iPhone, iPad, or Mac to the 40 ST instantly. Link rooms together, assign zones, and even control playback with Siri. The integration is smooth and reliable — just like it should be.

40 PSU Upgrade

Like its siblings in the 40 Series, the 40 ST is upgradeable via the external 40 PSU. With its precision-regulated, digitally controlled power rails, the 40 PSU provides ultra-low noise and greater dynamic stability. A single connection cable brings meaningful improvements to resolution, transient speed, and low-level detail retrieval.

The Listening Room Difference

We’re not a faceless warehouse or an algorithm-driven online shop. The Listening Room is a third-generation, family-owned hi-fi business rooted in service, relationships, and care. Our clients come to us for more than just gear; they rely on us for expertise, honest advice, and long-term support. If you have questions, we’re always just a call or visit away.

Specifications