CYRUS AMP Integrated Amplifier User Manual
- June 9, 2024
- CYRUS
Table of Contents
CYRUS AMP Integrated Amplifier
Product Objective
The Classic AMP is the latest update to an integrated amplifier that has been part of the Cyrus product range for over a decade.
The objective was to create a significant step up in performance from previous versions by using everything that we learnt when developing the fantastic XR Series, but retaining the familiar design of the Classic series. The circuit design has been completely re-designed and the majority of the internal components have been upgraded by the Cyrus R&D team, which has resulted in sound improvements that will help the Classic series retain a loyal fan base for years to come.
Features and benefits
Connectivity
- 4 x Analogue line level inputs
- 1 x Phono MM input for vinyl turntable
- 2 x Coaxial digital inputs via RCA phono
- 2 x Optical digital inputs via Toslink
- Unbalanced preamplifier outputs
- Fixed/Recording output
- Headphone output via 3.5mm jack
- MC-BUS connection (control integration with Cyrus system)
- PSX-R upgrade connection
- Firmware upgrade port
Power Amplifier
The power amplifier delivers 91W per channel into 6Ω. The wideband design
responds from D.C. to beyond 50kHz to ensure a flat frequency response and
minimal phase shift through the audio band.
Phono MM input
The phono MM input stage design features dual active gain stages and passive
RIAA equalisation.
Analogue preamplifier
The analogue preamp features relay input selection for the five analogue
inputs and a precision gain control for volume. The design is intentionally
wide bandwidth.
Digital to analogue conversion
The digital input stage features the award-winning QXR DAC. Input options
include 2 x coaxial digital and 2 x optical digital inputs.
High capacity power supply
The power supply includes a 304VA toroidal power transformer delivering power
to a high capacity power supply reserve. The preamplifier power supply is
electrically separated from the power amplifier and driven from its own
transformer winding. Digital control circuits are assigned a separate mains
power supply, completely isolated from the signal circuitry.
PSX-R port
The Classic Amp includes a port for the PSX-R power supply. Power from the
PSX-R is routed internally to the analogue stages of the preamplifier to
provide a more stable, low-noise power supply for the analogue preamp and
post-DAC stages of the D/A converter.
Specifications
EAN
| 230V version | 5060020434525 |
|---|---|
| 115V version | 5060020434518 |
Power Supply
| Voltage: | As plate on rear of unit |
|---|
Power Consumption
| Standby | < 0.5W |
|---|---|
| Maximum | 500W |
Enclosure
| Dimensions (WxHxD) | 215 x 75 x 365mm |
|---|---|
| Weight | 6.7kg |
| Material | Die cast chassis |
Line audio performance
| Power Output (2 ch driven) | 4 Ohms | 112W |
|---|---|---|
| Power Output (2 ch driven) | 6 Ohms | 91W |
| Power Output (2 ch driven) | 8 Ohms | 70W |
| THD+N (1kHz, 2/3 power) | 6 Ohms | < 0.002% |
| Input Sensitivity (91W/6Ω) | 225mV | |
| Input Impedance | 28kΩ | |
| Max input signal | 2.5V | |
| Frequency Response (-3dB) | < 0.5Hz, >50kHz | |
| S/N Ratio (unwtd) | >100dB |
Phono audio performance
| Input Sensitivity (91W/6Ω) | 2.3mV |
|---|---|
| Input Impedance | 47kΩ |
| Max input voltage | (1kHz) |
| Phono stage gain | (1kHz) |
| RIAA tolerance | < 0.5dB |
| S/N Ratio (unwtd, ref 91W/6Ω, vol -6dB) | 83dB |
| THD | <0.07% |
Digital audio performance
| Input voltage | 500mV pk-pk |
|---|---|
| Input Impedance | 75Ω |
| Sample rate range | 32k – 192k |
| Audio formats | PCM stereo only |
| S/N ratio (0dB fs) | -94dB |
| THD+N (0dB fs) | < 0.006% |
Headphone performance
| Recommended headphone impedance | 16Ω – 330Ω |
|---|---|
| Output power | (16Ω load) |
| Max output voltage | (330Ω load) |
| Signal to Noise Ratio (unwtd) | (35mW//16Ω) |
| THD | (35mW//16Ω) |
All voltage and power specifications in this section are RMS unless stated
otherwise.
Cyrus reserves the right to change all specifications without notice. E &OE
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