External power supply for the 40 Series.
Optimizes the performance of the 40 AMP, 40 CD, and 40 ST power supplies
Intelligent, stable, and noise-free power supply
Improves transparency, dynamics, and sound control
Digital regulation and direct communication with the component
Compact design in a black anodized aluminum chassis
bloques info producto

Bank Transfer (3% OFF)
If you make the payment via bank transfer, you will receive an extra 3% discount on your order.

Need to upgrade your equipment?
Would you be interested in trading in a device when purchasing this item?
Cyrus 40 PSU: High-Performance External Power Supply for the 40 Series
The Cyrus 40 PSU is a reference-grade external power supply designed to unlock the full potential of any component in the Cyrus 40 Series. Built with precision British engineering and housed in an elegant black anodized aluminum chassis, this power supply features an intelligent microprocessor that communicates directly with the host device, delivering ultra-clean, stable, and virtually noise-free power.
Optimized Power Delivery for Each 40 Series Component
With the 40 AMP: It reinforces the amplifier’s power rails, offloading the internal PSU to focus solely on the DAC section. This results in significantly improved transparency, dynamics, bass control, and harmonic richness—offering greater authority, timing accuracy, and musical engagement.
With the 40 CD: It powers the master clock and CD drive motors independently, reducing internal noise and improving disc reading precision. By separating the digital and analog DAC power supplies, jitter is reduced, yielding superior imaging, definition, and spaciousness.
With the 40 ST: It provides dedicated power to both the BluOS streaming module and the analog DAC, enhancing soundstage depth, micro-detail retrieval, and overall refinement.
Key Features
Intelligent power management with direct communication to host device
Digitally regulated multi-voltage outputs
Dramatic improvement in bass control, dynamics, and tonal precision
Fully compatible with Cyrus 40 AMP, 40 CD, and 40 ST components
Technical Specifications
Standby Mode: +5 V DC / 0 V
Fixed Operating Voltages: +5 V DC / +24 V DC
Regulated Variable Output: +10 V to +45 V DC
Unregulated Variable Output: +45 V or +56 V DC
Firmware Updates: via RJ45 Ethernet and mini USB
Dimensions: 88 × 220 × 365 mm
Weight: 9.4 kg
Cyrus 40 PSU: the essential upgrade for audiophiles seeking maximum sonic performance from the 40 Series.