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Cyrus Classic PRE - Pre-Amplifier


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SKU: cyrus-classic-preN/ACategories: Cyrus Audio, Hi-Fi Separates and Systems, HiFi Pre-Amplifiers

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The Cyrus Classic PRE is the latest update to a preamplifier that has been part of the Cyrus product range for over a decade.

This preamplifier provides a significant step up in performance from previous versions by using everything that Cyrus has 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.

Product Features

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.

Phono MM Input

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

Balanced / Unbalanced Inputs

The unbalanced outputs are provided for close wired systems where the power amplifier is located close to the Classic PRE. The balanced outputs are recommended for longer cable runs in systems where the Classic PRE is driving power amplifiers placed close to the system speakers or active speakers.

High Capacity 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.


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.

Technical Specifications

Line Audio Performance Input Impedance (LINE) 28kΩ
Output Impendance (LINE) 47Ω
Output Impendance (BAL PER PHASE) 47Ω
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 47kΩ
Max Input Voltage (1kHz) 25mV
Phono Stage Gain (1kHz) 40dB
RIAA Tolerance <0.5dB
S/N Ratio (unwtd, ref 2V out) 83dB
THD <0.07%
Digital Audio Performance Input Voltage 500mV pk-pk
Input Impedance 75Ω
Sample Rate Range (SPDIF) 32k - 192k
Audio Formats (SPDIF) PCM Stereo
S/N Ratio (Pre-Out 0dB fs) >97dB
THD+N (Pre-Out 0dB fs) <0.003%
Headphone Performance Recommended Headphone Impedance 16Ω - 330Ω
Output Power @ 16Ω Load 138mW
Max Output Voltage @ 330Ω Load 1.85V
Signal to Noise Ratio (unwtd) 90dB @ 35mW / 16Ω
THD @ 35mW / 16Ω <0.01%
Enclosure Dimensions (WxHxD) 215 x 75 x 365mm
Weight 4.4kg

Further Information

Cyrus Classic PRE - User Manual (PDF)


We offer Free Delivery on orders to the UK Mainland over £100.


Our staff are passionate about what they do and can provide advice and assistance on your purchase.


You can return any unwanted and unused item within 30 days and get a full refund.


Orders can be placed on our fully SSL-secured checkout with Debit / Credit Cards or via PayPal, Apple Pay and Google Pay. 

The products we use and sell are of the highest quality and we trust them wholeheartedly, but every now and again a product has a fault that is covered under the manufacturers warranty.

In the event of such an occurance please contact us via email at to proceed with the warranty process.

Below is a list of all the Manufacturers warranty timeframes with any special instructions for extended warranties:


  • 1 Year Standard Manufacturers Warranty


  • 5 Years standard Manufacturers Warranty


  • 5 Years with Installation by an Authorised Installer (Studio Incar is an Authorised Installer)
  • 1 Year if you are doing your own Installation
  • 2 Years if you register the product with the UK supplier


  • 2 Years standard Manufacturers warranty


    • 1 Year standard Manufacturers warranty
    • 2 Years if you register the product with the UK supplier


    • 90 Days Standard Manufacturers Warranty
    • 3 Years Extended Warranty - Product Registration within 30 days of Purchase


    • 6 Months standard Manufacturers warranty


    • 1 Year standard Manufacturers warranty

    Chord Company

    • Lifetime Warranty

    Cyrus Audio

    • XR series - 3 Years
    • Classic series - 2 Years
    • Turntable - 3 Years

    Product Registration Here


    • 2 Years on Car Audio Products - No Extendable Warranty
    • 2 Years standard Warranty on Home Audio Products
    • up to 8 Years Extendable Warranty on Home Audio Products when you register at Dynaudio


    • 1 Year Standard Manufacturers Warranty
    • 2 Years Extended Warranty when registered with Focal


    • 2 Years Standard Manufacturers Warranty


    • 1 Year standard Manufacturers warranty
    • 2 Years if you register the product with the UK supplier

    HiFi Rose

    • 2 Years Standard Manufacturers Warranty

    iFi Audio

    • 1 Year Standard Manufacturers Warranty

    JL Audio

    • 1 Year for Speakers and Subwoofers
    • 2 Years for Amplifiers and Processors


    • 3 Years Standard Manufacturers Warranty


    • 1 Year Standard Manufacturer Warranty
    • 3 Years Extended Warranty if Registered with Mission


    • 1 Year Standard Manufacturers Warranty

    Peachtree Audio

    • 2 Years Standard Manufacturers Warranty
    • 3 Years Extended Warranty if Registered with Peachtree


    • 2 Years Standard Manufacturers Warranty
    • 3 Years Extended Warranty if Registered with Pro-Ject


    • 4 Years for Passive Loudspeakers
    • 1 Year for Active Loudspeakers / Subwoofers
    • 5 Years for Passive Loudspeakers if Registers with Q Acoustics
    • 2 Years for Active Loudspeakers / Subwoofers if Registered with Q Acoustics


    • 1 Year Standard Manufacturer Warranty


    • 1 Year Standard Manufacturer Warranty


    • 2 Years Standard Manufacturers Warranty
    • 3 Years Extended Warranty if registered with Wharfedale
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