Cyrus Audio 40 AMP Review: Power, Clarity, and Precision
A High-Performance Amplifier Built to Celebrate 40 Years
To mark its 40th anniversary, Cyrus Audio released the 40 AMP—a reference-class integrated amplifier that pushes the limits of what compact British hi-fi can deliver. Hand-built in Cambridgeshire, this amplifier is the result of four decades of innovation in circuit design, power efficiency, and musical expression. In this review, we explore its design, sonic performance, and why the 40 AMP is one of Cyrus’s most impressive creations yet.
Design and Build
The Cyrus 40 AMP continues the iconic half-width chassis design, updated with a sleek anodized finish and a full-colour display. At 215mm wide, it saves space without compromising power or presence. The casing is solid metal, with precision-machined detailing and an intuitive control layout.
The front panel features a rotary volume encoder, responsive buttons, and a bright display for input selection and settings. Its compact size hides the internal complexity—this is a high-density amplifier designed to deliver audiophile-grade performance in tight spaces.
Technology and Features
At its core, the 40 AMP delivers 87W per channel (8Ω) and up to 140W (4Ω) using a custom-designed linear power supply and advanced Class AB topology. The amplifier uses precision-matched transistors, short signal paths, and fully decoupled stages for extremely low noise and high signal integrity.
Digital features include a high-resolution ESS DAC supporting 32-bit/384kHz and DSD. The 40 AMP includes USB-B, optical, and coaxial inputs, plus analog RCA and balanced XLR inputs. It also integrates seamlessly with the PSX-R2 external power supply for enhanced performance.
Connectivity
The Cyrus 40 AMP supports a wide range of sources, both analog and digital. It offers:
- 2 x RCA line-level inputs
- 1 x Balanced XLR input
- 2 x Optical and 2 x Coaxial digital inputs
- USB-B input for high-resolution computer audio
- Pre-out for connecting to power amplifiers
- Headphone output on the front panel
The amplifier also features dual speaker outputs for bi-wiring or dual-zone use.
Specifications
- Power Output: 87W per channel (8Ω), 140W (4Ω)
- Inputs: RCA, XLR, USB-B, coaxial, optical
- DAC: ESS 32-bit / 384kHz, DSD capable
- Headphone Output: 6.35mm jack
- Preamp Output: Yes
- External PSU Support: PSX-R2 compatible
- Dimensions: 215 x 75 x 360 mm
- Weight: 7.7 kg
- Finish: Brushed black or silver
Sound Performance
The 40 AMP delivers an immersive soundstage with pinpoint imaging and remarkable tonal accuracy. It handles delicate acoustic recordings with finesse, while unleashing punchy, tight dynamics for rock and electronic music. Bass is deep and articulate, mids are rich and full, and highs are detailed without harshness.
This amplifier reveals the character of every recording without exaggeration. It’s analytical, but never cold—bringing you closer to the original performance. Pair it with high-resolution sources and transparent loudspeakers to hear its full potential.
Pros and Cons
Pros:
- Compact but powerful Class AB amplification
- Excellent DAC with DSD and 384kHz support
- Balanced inputs and PSX-R2 compatibility
Cons:
- No built-in streaming or app control
- Remote lacks backlighting
- Limited space for large speaker cables
FAQ
Does the Cyrus 40 AMP support wireless streaming?
No, it does not include built-in streaming. Use a separate network streamer via USB or optical/coaxial input.
Is the DAC inside the 40 AMP high-end?
Yes. It features an ESS DAC with 32-bit/384kHz and DSD support, ideal for high-resolution digital audio.
Can it drive large floorstanding speakers?
Yes. With 140W into 4Ω and high current output, the 40 AMP can power most speaker designs with ease.
Conclusion
The Cyrus Audio 40 AMP is a brilliant culmination of four decades of British audio engineering. It brings together powerful Class AB amplification, an audiophile-grade DAC, and Cyrus’s signature compact design. For those seeking a clean, focused, and emotionally engaging sound in a refined package, the 40 AMP is not just a celebration—it's a serious contender in the high-end amplifier market.