High-Fidelity Power Amplifier Cyrus Power-XR

Power-XR Cyrus, Stereo Power Amplifier

The Cyrus Power-XR is a high-fidelity power amplifier that embodies the brand’s audio engineering expertise. As part of the XR series renowned for its audio performance, it stands out for its ability to work harmoniously with a wide range of speakers, offering a listening experience faithful to the original recording and imbued with Cyrus’ distinctive sound identity.

Performance and Technology

At the heart of the Power-XR lies a wideband power amplifier capable of responding from DC to beyond 100 kHz. This ensures a ruler-flat frequency response and eliminates undesirable phase shifts in the audio band. The amplifier’s oversized power supply, featuring a massive 408 VA toroidal transformer, allows it to effortlessly reproduce the scale and drama of musical performances.

The Power-XR is equipped with Cyrus’ advanced Hybrid Class D amplification technology, enhancing efficiency and precision. This technology, combined with high current drive capability, enables the Power-XR to drive even the most demanding speakers with finesse and realism.

Connectivity and Upgrade Possibilities

The Power-XR includes unbalanced RCA and balanced XLR inputs, ensuring compatibility with a wide range of audio sources. It also features a 12V trigger input and Cyrus’ proprietary MC-BUS control bus for integration with other Cyrus systems. A firmware update port is included, enabling future updates and enhancements.

For those seeking to further enhance the amplifier’s performance, the Power-XR includes a port for the optional PSU-XR power supply. This external power supply provides five independent regulated supplies, with two dedicated to the voltage amplifier section and two to the power amplifier section, offering a dynamic boost and ultra-smooth power delivery.

User Experience

Listeners can expect an immediate improvement in speed, an extremely low noise floor, and precise tracking of the musical signal. The Power-XR delivers sonic clarity with a finely balanced soundstage, transforming every musical moment into an immersive and emotionally engaging experience.

Benefits of the Power-XR

Extended frequency response up to 100 kHz for accurate signal reproduction.
Low background noise for an immersive listening experience.
Robust design with an oversized toroidal transformer for optimal power stability.
Compatibility with the PSU-XR power supply for enhanced performance.

Technical specifications

2 x 100W stereo power amplifier
Cast aluminum chassis

Measurements

Without PSU-XR:
- Output power (2 channels):
  - 4 Ω: 144W
  - 6 Ω: 110W
  - 8 Ω: 87W
With PSU-XR:
- Output power (2 channels):
  - 4 Ω: 161W
  - 6 Ω: 121W
  - 8 Ω: 95W
THD+N (1kHz, 2/3 power): 6 Ω < 0.002%
Input sensitivity (110W/6Ω): 450mV RCA / 900mV XLR
Input impedance: 28kΩ
Frequency response (-3dB): < 0.5Hz, > 100 kHz
Signal-to-noise ratio (unweighted): > 100 dB