Cyrus 40 Amp with 40 ST Streaming Music Player
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Whether your preference is digital or analogue, the Cyrus 40 AMP integrated amplifier is meticulously designed to be the heart of your home audio system, delivering an unparalleled performance regardless of your playback source. Capable of driving even the most demanding loudspeakers, this integrated amplifier meets the expectations of today’s discerning music enthusiasts with exceptional precision and power.
Optimised Digital Performance
At the core of all Cyrus digital products is a bespoke DAC design, and the 40 AMP exemplifies this commitment to excellence. Featuring the ESS Sabre ES9039Q2M chipset and HyperStream IV Dual DAC technology, the 40 AMP has been optimised to achieve peak performance. Each component has been carefully analysed by our engineering team, ensuring a digital experience that surpasses expectations.
Improved Low Noise Phono Stage
Building on the award-winning design of the Classic PHONO, the 40 AMP incorporates a phono stage that operates well beyond its class. With low background noise and high dynamic range, it is the ideal complement for a premium vinyl turntable, ensuring that analogue playback is as flawless as its digital counterpart.
Refined Aesthetic and Power Supply Upgrade

Housed in a striking, sleek brushed and black hard-anodised aluminium chassis, the 40 AMP boasts both elegance and functionality. Its 5” high-resolution, full-colour TFT display, combined with a toughened glass front panel and hidden-until-lit capacitive touch controls, makes for a truly modern user interface. The 40 AMP comes equipped with Cyrus’s custom-designed switch mode power supply, which can be further enhanced by connecting the optional 40 PSU external power supply, offering even greater stability and virtually noise-free operation.
Cyrus 40 ST
For those whose music is predominantly digital, the Cyrus 40 ST streaming music player is their highest-performing network streamer, crafted to deliver the ultimate audio experience.

BluOS
Powered by the intuitive BluOS hi-res streaming platform and encased in the elegant new 40 series aluminium chassis, this device ensures that your favourite music streams effortlessly at up to 24-bit/192kHz across your home network, with minimal lag and no loss in sound quality. Its sophisticated design and powerful features make it the ideal choice for music lovers seeking premium performance. The BluOS app provides seamless access to millions of songs, internet radio stations, and podcasts from around the globe. Whether stored on your smartphone, tablet, or computer, your entire music collection can be enjoyed anywhere in your home, with full integration into the BluOS ecosystem.
Roon Ready & MQA Decoding
The 40 ST is Roon Ready, integrating all your music effortlessly, regardless of where it is stored or streamed from. The player also supports MQA technology, delivering master-quality audio as intended by the artist. Its built-in MQA decoder ensures the highest fidelity from studio recordings to playback.
AirPlay 2 and Digital Inputs
With AirPlay 2, the 40 ST can sync across multiple rooms, allowing seamless music enjoyment throughout the house. Additionally, it features both optical and coaxial digital inputs, enabling external devices such as CD players or televisions to benefit from Cyrus' superior DAC technology.
Digital Performance
The 40 ST continues Cyrus' tradition of superior digital design. Featuring the ESS Sabre ES9039Q2M chipset and HyperStream IV Dual DAC technology, every component has been meticulously crafted and optimised to maximise performance. This streamer excels in delivering accurate and dynamic sound quality, ensuring a true high-fidelity experience.
40 Series Chassis
The new 40 series chassis reflects the premium nature of the 40 ST, with a sleek brushed and black anodised aluminium exterior. The 5-inch high-resolution full-colour TFT display, complemented by a toughened glass front panel and hidden capacitive touch controls, adds a modern and luxurious feel to the unit, providing both durability and aesthetic appeal.

It's all about Control
Packaged with the new Cyrus remote, the 40 ST is primarily controlled via the intuitive BluOS app, compatible with iOS, Android, Kindle, Mac, and PC. With access to over 20 integrated streaming services, global radio stations, and your own music library, the 40 ST offers a comprehensive and unmatched digital listening experience, all within its stylish new chassis.
Power Supply Upgrade
To enhance performance further, the 40 ST is compatible with the 40 PSU external power supply. With multiple supplies and digitally controlled output voltages, the 40 PSU ensures unparalleled stability and near-zero noise interference, resulting in a superior listening experience.
40 AMP Specifications
DAC: | ESS Sabre ES9039Q2M 32-bit DAC |
Power Output: | 2 x 100W (2 x 113W with 40 PSU) into 6 Ω |
Analogue Inputs: | 4 x Analogue Inputs |
Phono MM Input: | 1 x Phono MM Input |
Digital Optical Inputs: | 1 x Digital Optical Input |
Digital Coaxial Inputs: | 2 x Digital Coaxial Inputs |
Asynchronous USB-B Input: | 1 x Asynchronous USB-B Input |
HDMI eARC Input: | 1 x HDMI eARC Input |
Analogue Preamplifier Out: | 1 x Analogue Preamplifier Out |
Fixed Output: | 1 x Fixed Output |
Headphone Output: | 1 x Headphone Output |
40 PSU Compatible: | Yes |
SPDIF Supported Formats: | 16/44.1k - 24/192k |
USB Supported Formats: | 16/44.1k - 32/384k |
DSD Supported Formats: | Up to DSD256 |
DOP Supported Formats: | Up to DOP128 |
Remote Control: | Yes |
RJ45 Ethernet: | For Firmware Updates |
USB-A: | For Firmware Updates |
Dimensions: (H x W x D) | 88 x 220 x 385 mm |
Weight: | 8.5 kg |
Warranty: | 5 Year Warranty |
40 ST Specifications
DAC: | ESS Sabre ES9039Q2M 32-bit |
Line Level Analogue Outputs: | 2 x Line Level Analogue Outputs |
Digital Coax Output: | 1 x Digital Coax Output |
Digital Optical Output: | 1 x Digital Optical Output |
Digital Coax Input: | 1 x Digital Coax Input |
Digital Optical Input: | 1 x Digital Optical Input |
PSU Compatibility: | 40 PSU Compatible |
Wireless Antenna: | Built-in Wi-Fi Antenna |
Ethernet Socket: | RJ45 Ethernet Socket for Wired Network |
USB Socket: | USB-A Socket for Music Playback |
Network Connectivity: | Ethernet (GigE 1Gbps), Wi-Fi 5 (802.11ac, 2.4/5GHz) |
Size: (H x W x D) | 88 x 220 x 385 mm |
Weight: | 4.8 kg |
Warranty: | 5 Year Warranty |
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