The New... Cyrus Classic AMP

This integrated amplifier provides 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.

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.

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.

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

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.

Phono MM Input

The phono MM input stage design features dual active gain stages and passive RIAA equalisation.

Features... 

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

Headphone output via 3.5mm jack

PSX-R upgrade connection

Firmware upgrade port

Dimensions (WxHxD) 215 x 75 x 365mm

Weight – 6.7kg

Specifications... 

EAN 230V version ............................................ 5060020434525

Power Supply

Voltage: .......................................... 230V

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/6 Ohms)......................................225mV

Input Impedance ........................................................ 28k?

Max input signal...........................................................2.5V

Frequency Response (-3dB).......................<0.5Hz, >50kHz

S/N Ratio (unwtd) ................................................... >100dB

Phono audio performance

Input Sensitivity (91W/6?)...........................................2.3mV

Input Impedance...................................................47k Ohms

Max input voltage ................... (1kHz) .......................25mV

Phono stage gain..................... (1kHz) ........................80dB

RIAA tolerance .........................................................<0.5dB

S/N Ratio (unwtd, ref 91W/6?, vol -6dB) ...................83dB

THD.......................................................................... <0.07%

Digital audio performance

Input voltage.................................................. 500mV pk-pk

Input Impedance................................................... 75 Ohms

Sample rate range............................................... 32k - 192k

Audio formats................................................... PCM stereo

S/N ratio (0dB fs)........................................................-94dB

THD+N (0dB fs) ..................................................... <0.006%

Headphone performance

Recommended headphone impedance........... 16 Ohms - 330 Ohms

Output power ......................... (16 Ohms load) ............ 138mW

Max output voltage................. (330 Ohms load) ..............1.85V

Signal to Noise Ratio (unwtd) . (35mW//16 Ohms)............90dB

THD.......................................... (35mW//16 Ohms)........ <0.01%

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