Cyrus 40 PSU Power Supply

The Cyrus 40 PSU is the ultimate external power supply upgrade for the 40 Series, engineered to dramatically enhance sonic performance by delivering clean, precisely regulated power to your system. Designed to interface seamlessly with the 40 AMP, 40 ST, and 40 CD, this modular component offers an immediate leap in musical realism, clarity, and control.

Housed in the elegant 40 Series aluminum chassis, this advanced external power supply offers a new level of clean, stable, intelligently regulated voltage delivery to any compatible 40 Series host component. At its core is an onboard microprocessor that communicates directly with the connected unit, tailoring the exact power configuration in real time. The result is lower noise, improved timing, and a dramatic leap in sonic performance, no matter which 40 Series product it’s paired with.

Key Features

• Dedicated High-Current Power: Offloads power demands from your core components to eliminate internal noise and improve resolution
• Microprocessor-Controlled: Constant communication with connected devices ensures optimal voltage and current delivery
• 15-Pin Connectivity: Simple, high-integrity connection to any compatible 40 Series unit
• Noise-Free Output: Digitally controlled internal regulation creates a virtually silent power supply
• British Design and Build: Hand-assembled in the UK for long-term reliability
• 5-Year Warranty: Cyrus build quality backed by a long-term manufacturer guarantee
• Matching 40 Series Chassis: Anodized aluminum construction with a compact, stackable footprint

40 AMP Enhancements

When connected to the 40 AMP, the 40 PSU provides the power amplifier section with a much stiffer, cleaner power supply, allowing the signal to more faithfully track the source material. The preamp section is completely driven by the PSU as well, resulting in greater dynamic accuracy and less distortion. This division of labor allows the internal supply to focus on the DAC stage, improving resolution even further. The audible result is more weight and authority, greater detail retrieval, improved attack and decay, and tighter overall timing.

40 CD Enhancements

With the 40 CD, the 40 PSU takes over powering the CD motors and master clock. Removing this noisy circuitry from the internal supply reduces interference and jitter. The PSU also handles the analog section of the DAC, while the internal supply focuses solely on the digital domain. This segmentation brings greater imaging precision, improved note articulation, and deeper bass control, with more defined edges and separation.

40 ST Enhancements

When paired with the 40 ST, the 40 PSU powers the analog side of the DAC and the BluOS streaming module, delivering a purer signal path and lowering system noise. This upgrade enhances low-level detail, expands the perceived soundstage, and increases instrument separation. Vocals gain added presence, and the entire performance takes on a more holographic quality.

Specifications