Cyrus 40 ST network streamer

Discover the Cyrus 40 ST, a premium network streamer designed to bring uncompromising sound quality to your digital audio system. Built with Cyrus’s signature attention to detail, the 40 ST offers hi-res performance, flexible connectivity, and modern streaming capabilities — all wrapped in a sleek, minimal aluminium chassis.

Features of Cyrus 40 ST

• Hi-Res Streaming with BluOS
  The 40 ST is powered by the BluOS high-resolution streaming platform, giving you seamless access to over 20 natively integrated streaming services, thousands of radio stations, and your own networked music library. With support for up to 24-bit / 192 kHz, it delivers precise, lossless playback with zero lag over your home network.

• Powerful Custom DAC
  At the heart of the 40 ST lies a custom implementation of the ESS Sabre ES9039Q2M chipset with HyperStream IV Dual-DAC technology. Cyrus engineers have optimized the board layout to minimize noise and maximize clarity, rendering music with remarkable detail, dynamics, and neutrality.

• MQA Decoding & Roon Ready
  The streamer supports MQA decoding, enabling studio-quality reproduction of master tracks. It also comes Roon Ready, allowing for bit-perfect streaming, rich metadata, and multi-room audio via Roon’s powerful ecosystem.

• AirPlay 2 Integration
  With AirPlay 2, you can stream directly from your Apple devices, connect multiple rooms, and even control playback with Siri — perfectly suited for a modern Apple-centric setup.

• Flexible Connectivity Options
  The 40 ST offers extensive I/O flexibility:

  • Analogue outputs (2 × RCA)
  • Digital outputs (1 × coaxial, 1 × optical)
  • Digital inputs (1 × coaxial, 1 × optical), allowing you to feed external sources (e.g., TV, CD player) through Cyrus’ high-performance DAC
  • USB-A for local playback from thumb drives or external storage
  • Network: Gigabit Ethernet (RJ45) + built-in Wi-Fi 5 (802.11ac)
• Upgradeable Power Supply
  For those seeking even more stable performance, the 40 ST is compatible with the external 40 PSU. This dedicated power supply delivers ultra-clean, digitally controlled voltages, reducing noise and enhancing the sonic performance of both the DAC and network module.

• Elegant, Modern Design
  The 40 ST’s chassis is crafted from anodised aluminium and features a 5-inch full-colour TFT display behind a toughened glass panel. Capacitive touch controls remain hidden until lit, giving it a clean, elegant look that fits any high-end setup.

Applications of Cyrus 40 ST

• High-Fidelity Home Music Systems
  Use the 40 ST as the central digital hub in a serious hi-fi rig, driving an external DAC, preamp, or integrated amplifier.

• Music Streaming & Multi-Room Audio
  Perfect for streaming services like TIDAL, Qobuz, Spotify, and more, while also integrating into multi-room setups via BluOS, Roon, or AirPlay 2.

• Upgrading Legacy Digital Sources
  Use the 40 ST as a DAC and network bridge for older digital sources (TVs, CD players, media streamers), taking advantage of its high-quality analog outputs.

• Audiophile Listening & Critical Playback
  Image, timing, and low-noise performance make this ideal for critical listening, reference systems, or dedicated music rooms.

Specifications of Cyrus 40 ST