The New... Cyrus Classic PRE

This preamplifier 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.

Optional Balanced Cables... Chord Shawline XLR   RRP £350, Half Price with this order.

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 Classic Pre power supply includes a 74VA toroidal power transformer delivering power to a high capacity power supply reserve. Within the circuit design, a total of 11 independent power supply regulators regulate, then sub-regulate quiet power. Digital control circuits are assigned a separate mains power supply, completely isolated from the signal circuitry.

PSX-R

The Classic Pre 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.

Optional Interconnect cable... Chord Shawline XLR   RRP £350, Half Price with this order.

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

True balanced outputs via XLR   

Headphone output via 3.5mm jack

PSX-R upgrade connection

Firmware upgrade port

Dimensions (WxHxD) 215 x 75 x 365mm

Weight – 4.4kg

Specifications

EAN

230V version ............................................ 5060020434556

Power Supply

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

Power Consumption

Standby .....................................................................<0.5W

Maximum.....................................................................25W

Enclosure

Dimensions (WxHxD)............................ 215 x 75 x 365mm

Weight.........................................................................4.4kg

Material......................................................Die cast chassis

Line audio performance

Input Impedance..................... Line............................28k Ohms

Output impedance.................. Line..............................47 Ohms

Output impedance.................. Bal (per phase)............47 Ohms

Max input voltage ................... Line.............................2.5V

System gain ............................. Line..............................6dB

System gain ............................. Bal..............................12dB

Max output voltage................. Line.............................2.5V

Max output voltage................. Bal..................................5V

Frequency Response (-3dB).... Line.........<0.5Hz, >100kHz

Signal to Noise Ratio (unwtd) . Line (ref 2V out) ......110dB

THD.......................................... Line (ref 2V out) .. <0.001%

Phono audio performance

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

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

Phono stage gain..................... (1kHz) ........................40dB

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

Signal to Noise Ratio (unwtd) . (ref 2V out)................83dB

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

Digital audio performance

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

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

Sample rate range (SPDIF) ..................................32k - 192k

Audio formats (SPDIF)...................................... PCM stereo

S/N ratio (unwtd) .................... (Pre-out, 0dB fs)......>97dB

THD.......................................... (Pre-out, 0dB fs).. <0.003%

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