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Cyrus Pre X Pre Amp

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Cyrus Pre X Pre Amp
Cyrus Pre X Pre Amp
Cyrus Pre X Pre Amp
Cyrus Pre X Pre Amp
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Product Description

This Cyrus Pre X Pre Amp has come to us via a part exchange and comes with a 6 month warranty.

The pre amplifier has been tested and is in full working order.

It is in good cosmetic condition, apart from a few minor scratches to the top (please see images).

This Cyrus Pre X Pre Amp comes in the original box and packaging, with power cord included only.

The Pre X is a specially developed control unit to partner our range of matching mono and stereo power amps. Featuring a huge power supply, finely tuned power regulation stages and our most detailed circuit tuning, the Pre X manages to combine outstanding performance with simple intuitive operation. Some of the more advanced features are hidden from immediate view. These include our intuitive speed sensing volume knob, individual input sensitivity and a high quality headphone circuit that allows you to leave your headphones permanently connected. This is useful if, like many owners, you want to listen at night, relaxing in a favourite chair.

A no-compromise development process and access to fine quality (not to say expensive) components allowed the Cyrus tuning panel to open up the frequency response. This expands the preamp’s ability to recreate a large sense of scale and ambience, for the most effective system performance to date. Pre X can be further improved by adding a PSX-R to provide a quiet, smooth, regulated power feed to its sensitive circuitry.

The X-series has been the most demanding product range developed to date by Cyrus. Over many months the team applied their established skills in taking a technically excellent amplifer design, and through incremental listening tests worked to achieve a natural and extended soundstage with outstanding bandwidth. From the inclusion of massive, over-engineered linear power supplies through to the selection of specialist coupling components designed specifically for use in high-end amplifiers, the Pre X/Mono X amplifier system is the first X-series statement from Cyrus.

At the heart of the Pre X preamplifier is a new design based around an over-specified power supply with a custom designed 107VA toroidal power transformer and selected reservoir capacitors. The preamplifier electronics are fully solid-state, avoiding any problems of mechanical contact degradation and feature a contactless input switch and a digitally controlled precision volume control. The control system provides full AV system integration with a Cyrus surround decoder such as the AV8.

An essential part of any preamplifier, the power supply at the heart of the Pre X does not include an electrically noisy switch mode power supply but is traditionally designed using the highest quality components. The total power requirement of the preamplifier will never stress the power supply of the Pre X which has enough capacity in reserve to comfortably feed a medium sized power amplifier!
Cyrus engineering of straight line, short path design establishes a high-performance circuit for the Pre X to be built on, with the solid-state topology of the Pre X ensuring that there are no switches or other contacts in the signal path to introduce undesirable distortion artefacts which could degrade the signal. Additionally for the Pre X, a new generation of coupling components designed specifically for high-end audio amplifiers are featured throughout the signal stages of the preamplifier.

The digitally controlled analogue volume control features laser trimmed resistor networks whose production accuracy allows excellent channel matching – particularly at low volume settings.

Designed for optional integration with a Cyrus Home Theatre system, the intelligent control computer of the Pre X, when connected via MC-BUS to a Cyrus surround decoder, automatically senses the presence of the decoder and re-calibrates the preamplifier if a Home Theatre source is playing. This application of a Pre X with a separate surround decoder eliminates all compromise in a system used to enjoy both stereo and surround program material. This advanced communication protocol elevates our audiophile systems to the high-ground of lifestyle systems.


  • Output voltage – 940mV
  • Max output voltage – 9V
  • Preamp Output impedance – 50 Ohm
  • Distortion – 0.003%
  • Frequency Response – -3dB at 0.04Hz and 700kHz
  • Input sensitivity – 500mV
  • Input impedance – 100 kOhm
  • Line s/n ratio – (unwtd) 105dB
  • Line inputs – 6 + Tape monitor
  • Pre-amp Outputs – 2 Preamp-out (RCA phono sockets)
  • Tape Outputs – Tape-out
  • Headphone Output – Ό” Jack
  • Power Supply – Linear power supply with custom toroidal transformer
  • External – Highly regulated PSX-R upgradeable
  • Communications – MC-BUS System BUS
  • Dimensions – (H x W x D) 73 x 215 x 360 (mm)
  • Weight – 3.7kg
  • Finish – Black
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