Cyrus Mono X 300 Signature

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Cyrus Mono X 300 Signature mono power amplifier
Cyrus Mono X 200 Signature mix DAC Mono X 300 Signature pic4 DAC Mono X 300 Signature pic3


Cyrus Mono X 200 Signature - Hifi Pig review

Cyrus Mono X 200 Signature

Cyrus Mono X 200 Signature - Hifi Pig review
  • Soundstaging is wide and deep, not to mention impressively high. They convey great ambiance to the sound and project vocals in a clear and natural manner.
  • The Cyrus X200 Signature monos have a great refinement to a wide resolution and a lovely smoothness to the midrange. They are fantastically musical and cohesive.
  • There are clearly extended realms of resolution in the music and extension at both upper and lower frequencies which make these amps sound just so balanced and involving.
  • The amps are extremely powerful and will have no problems driving speakers with difficult loads and still leaving room for dynamic slam.
Cyrus Mono X 300 Signature - What Hi-Fi review

Cyrus Mono X 300 Signature

CYRUS - What Hi-Fi 5 Stars
  • A class-leading combination of agility, resolution and dynamic subtlety that’s rare at any price, let alone for this money
  • Where the Cyrus excels is in its ability to combine this muscle with an agility, precision and rhythmic drive rarely heard in high-power amps. Time and again we were pleased by the X 300’s muscle but stunned by its insight and subtlety.
  • if you want a wonderfully informative amplifier that communicates the drama in music in a really articulate and precise way, we haven’t heard better for the money
  • Massively detailed; impressive dynamics; combination of finesse and muscle; timing

Cyrus Mono X 300

CYRUS - What Hi-Fi 5 Stars
  • Paired with the DAC XP+, Cyrus's Mono X300 is a nearly unbeatable preamp/power combination
  • Exceptionally good. If fluidity and agility are your thing, there’s little better
  • Impressive detail resolution, Agility, Lack of harshness
  • Explosive punch and dynamics
  • "It’s organic without displaying even the tiniest degree of excess warmth. And that’s to say nothing of the class-leading speed and dynamic ability."

Cyrus Mono X 300

Hi-Fi Choice logo
  • “It is capable of staggering results with almost every piece of music at almost every volume level...”

Cyrus Mono X 300

Hi-Fi Choice logo
  • Speed and resolution have rarely been combined so effectively
  • Good price
  • "We heard things on discs that have been reference points for years that have not been apparent before, it's quite uncanny really that this can be achieved with 'just' a power amp. "

Cyrus Mono X 300 Signature Features:

  • Audiophile quality power amp with huge power and capacity
  • Outputs over 300 Watts with outstanding control and dynamics
  • Zero Feedback circuit design eliminates unnecessary circuit paths for wide open imaging and pitch black background noise
  • Totally separated power rails for the final stage, VAS, input stage and control systems
  • Separate transformer windings and regulated rails for the voltage amplifier stage: Extremelly clean and stable voltage gain stage with no trace of ripple and noise
  • Short signal path: Reduced crosstalk and extremely low distortion, preserving signal purity
  • No output relay: Purist design and clean signal path, no sonic degradation
  • Soft-start system: No turn-on thump
  • Mono X 300 Signature willl partner perfectly with the DAC XP Signature preamplifier
CYRUS Mono X 300 Signature - CYRUS Zero Feedback technologyMono X 300 S.
CYRUS Zero Feedback

Product Overview

The Mono X 300 Signature incorporates a huge amount of power to provide great amplification, with our Zero Feedback technology. 

Inside, the amplification processes have been expertly engineered to produce zero feedback, with complex circuitry making sure that the output is powerful and precise.

Despite the much higher cost of production, we pursue  Zero Feedback technology because it brings some very special attractive sonic benefits. The amplification processes have been expertly engineered to produce Zero Feedback, with complex circuitry making sure that the output is powerful and precise. Two interesting benefits of Zero Feedback technology are:

  1. The design allows the key stages in our amplifier to work independently without the hindrance of global feedback. In a traditional amplifier the corrective actions necessary in the output stage to drive a loudspeaker are fed through the entire amplifier, disturbing unnecessarily the input and voltage amplifier stages. To put this another way, it allows the first stage of the amplifier to operate without the unwelcome influence of the latter, separate voltage and current stages.  Zero Feedback amplifiers are only possible when one understands how to prevent distortion in the first place. They require very advanced circuit topology and close tolerance components.
  2. Cyrus Zero Feedback amplifiers are able to create an uncanny sonic blackness onto which we paint our musical image. They can achieve this because as the output level reduces to lower levels, where the ear becomes most sensitive to these effects, the distortion produced by the Mono X 300 Signature falls below measurable limits. The result is an exceptional musical performance.
Cyrus DAC XP Signature & Mono X 300 Signature
DAC XP Signature and Mono X 300 Signature


Technical Information

Power output: 319W (into 6 Ohms)
Burst Peak Power: >2000W
THD+N @ 2/3 full power: <0.004%, (1kHz into 8 Ohms), <0.05% (20Hz - 20kHz into 8 Ohms)
Frequency Response: 0.5Hz – 300Khz (-3dB)
Slew rate: 700V/S (input filter bypassed)
Sensitivity for 50W into 8 Ohms: 381mV (RCA input), 775mV (BAL input)
Sensitivity for 225W into 8 Ohms: 890mV (RCA input), 1.78V (BAL input)
Input impedance: 47kΩ (RCA), 20kΩ (BAL)
Chain Output: 890mV (for 890mV RCA or 1.78V BAL input)
S/N ratio: 116dBA
Dimensions (H x W x D): 73 x 215 x 360 mm
Finish: Brushed black, Quartz silver
Weight: 7.4kg

XLR balanced*
RCA phono*
*The front panel INPUT key selects RCA Phono or Balanced input connection

Bi-wire loudspeaker terminals (BFA plugs supplied)
RCA Chain Out (buffered, unity gain)

Enclosure: Cyrus Inverted die-cast chassis
Material: Lightweight non-magnetic alloy

CYRUS chassis
CYRUS chassis

Power Consumption:                          
Standby: < 1W
ON, no signal: 23W
Maximum: 750W

MC-BusTM System Bus
12V Trigger

Cyrus Mono X 300 Signature rear panel drawing
CYRUS_Mono_X_300_Signature__Brochure_(PDF) CYRUS_Mono_X_300_Signature__Guide
Stereo Setup - partnering electronics
ELAC Alchemy DDP-2 DAC-Preamplifier
Cyrus DAC XP Signature DAC-Preamplifier
DAC XP Signature
ATC CA2 MK2 Preamplifier ATC CDA2 DAC-Preamplifier DAYENS Ampino Preamplifier
Stereo Setup - partnering loudspeakers
ATC SCM 20 SL Stereo Setup
ELAC 330 CE Stereo Setup XAVIAN XN 270 Stereo Setup
330 CE XN 270 Evo
ATC SCM 40 Stereo Setup
ELAC FS 409 XAVIAN XN Carisma Stereo Setup
FS 409 XN Carisma
ATC SCM 50 SL Stereo Setup
ELAC Spirit of Music CE Stereo Setup XAVIAN XN Virtuosa Stereo Setup
Spirit Of Music CE XN Virtuosa
ATC SCM 100 SL Stereo Setup ELAC FS 509 VX-JET Stereo Setup XAVIAN XN 360 Stereo Setup
SCM 100 SL FS 509 VX-JET XN 360
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