The Cyrus Classic Stream marks the British manufacturer’s strong return to the audio streaming market, combining the globally recognized BluOS platform with the acoustic expertise developed over four decades in Huntingdon. This alliance between proven software and meticulous hardware know-how positions this player as a particularly coherent proposition in the competitive world of streamers.
Choosing BluOS for the Classic Stream reflects a welcome pragmatism. Rather than persisting with an obsolete proprietary platform, Cyrus turned to the solution developed by the Canadian Lenbrook group, which also owns NAD, PSB Speakers, and Bluesound.
BluOS is much more than a simple playback app. It’s a complete ecosystem capable of managing up to 64 high-resolution audio zones, delivering streams up to 24-bit/192 kHz without compression or perceptible latency. Perfect synchronization across rooms relies on a sophisticated network architecture that prioritizes stability and signal quality.
The BluOS control app, available on iOS, Android, Windows, Mac, and even Kindle, stands out for its refined ergonomics. The interface presents local sources (files on NAS, USB drives), streaming services (Tidal, Qobuz, Deezer, Spotify), and thousands of available Internet radio stations in a coherent way. Navigation remains fluid even with large libraries, thanks to efficient indexing and optimized search algorithms.
Native Apple AirPlay 2 integration allows iOS users to stream directly while retaining multiroom control via Siri. Voice commands can select music and listening rooms, turning the Classic Stream into a component of a modern smart home system.
At the core of the Classic Stream beats an ESS ES9038Q2M converter, a latest-generation chip using HyperStream II architecture. This technology, initially reserved for professional converters, employs 32-bit signal processing to minimize conversion artifacts.
The ES9038Q2M integrates seven programmable reconstruction filters, allowing playback to be tailored to listening preferences. From the minimum-phase linear filter to the apodizing filter, each option subtly changes the sonic presentation. Measurements show a signal-to-noise ratio of -108 dBA and total harmonic distortion plus noise of only 0.0035%, values that place the Classic Stream on par with significantly more expensive converters.
Cyrus’s QXR optimization goes beyond a standard ESS implementation. The Huntingdon engineers carefully selected every surrounding component—decoupling capacitors, voltage regulators, analog output stages—to extract the chip’s maximum potential. This meticulous approach results in precision playback that reveals micro-details without artifice or coloration.
Built-in MQA decoding enables playback of Master Quality Authenticated files, a format that encapsulates the original studio recording into smaller files. Though controversial, MQA here benefits from a transparent implementation that lets the listener judge its relevance.
The Classic Stream offers a well-balanced set of connections between modernity and compatibility. The Gigabit Ethernet port ensures a stable, fast network connection, essential for uninterrupted high-resolution streaming. Dual-band Wi‑Fi 5 (802.11ac) provides a capable wireless alternative, maintaining sufficient throughput even at 24/192.
The audio outputs reflect this versatility. Stereo analog RCA outputs benefit from a refined output stage, capable of delivering a standard line-level signal compatible with any amplifier. Optical Toslink and coaxial digital outputs allow the use of an external DAC if desired, though this seems superfluous given the quality of the built-in converter.
The MC-BUS system deserves special attention. This proprietary Cyrus connection, present since the 1990s, turns individual components into an integrated system. Via simple phono cables, the various elements communicate with each other: selecting the “Streamer” input on a Cyrus amplifier automatically wakes the Classic Stream, while standby powers down the entire system. This seamless integration eliminates remote control clutter and simplifies everyday use.
The PSX-R2 port represents a significant upgrade path. This 300 W regulated external power supply, featuring an oversized toroidal transformer and 30,000 microfarad filtering capacitors, completely isolates sensitive analog sections. Connection is via a quality XLR cable, and parameter matching occurs automatically. Users consistently report improvements in dynamics, soundstage depth, and tonal definition after adding the PSX-R2.
The Classic Stream’s dimensions—75 × 215 × 355 mm at 3 kg—continue Cyrus’s half-width tradition. This compactness allows two devices to sit side by side on a standard shelf, or for components of a complete system to be stacked vertically. The Cyrus Hark rack, specifically designed for this configuration, optimizes vibrational isolation between elements.
The die-cast aluminum chassis is about more than aesthetics. Its inverted structure, where circuits are suspended inside rather than mounted on the base, minimizes vibration transmission. The hand-applied linear brushing on each front panel provides an elegant matte finish that resists fingerprints and superficial scratches.
This construction approach partly explains the exceptional longevity of Cyrus products. The brand proudly states that 80% of the devices manufactured since 1984 are still operating, thanks to an extensive support policy that enables repairs and upgrades within the same chassis.
Yes. Through BluOS, the Classic Stream accesses music libraries stored on NAS or computers sharing folders on the network. The app automatically indexes files and handles high-resolution formats up to 24-bit/192 kHz, including FLAC, WAV, AIFF, and ALAC.
The Stream-XR adds a high-resolution screen, capacitive touch buttons, and two presets for direct access to favorite stations. It also integrates the second-generation QXR DAC and offers two additional digital inputs. Both models, however, use the same BluOS platform and support the PSX-R2 upgrade.
The BluOS ecosystem lets you group up to 64 compatible devices, whether from Cyrus, NAD, Bluesound, Dali, or other partners. You can synchronize music across all rooms or play different content simultaneously, all controlled from a single app.
The analog outputs can simultaneously feed an amplifier and an active subwoofer with line-level inputs. Use Y-cables, or check if your subwoofer offers a pass-through output to simplify cabling.
Cyrille
does not work with my Arcam or Kora amplifiers and my Cabasse speakers, sound too harsh, quite far from my old CD6 SE player. I only had treble.
Comment from March 17, 2026 — Experience from March 06, 2026
