CYRUS MONO X 300

What HiFi 5 star review.  They say " impressive detail resolution, agility,, lack of harshness, explosive punch and dynamics.  Exceptionally good; if fluidity and aglity are your thing, there's little better"

The Mono X 300 is a massively powerful amplifier, yet it is still housed inside just one magnesium die-cast chassis. Incredibly, it is able to drive over 300 watts into real world speaker loads!

Mono X 300 - 235W (into 8 Ohms) 289W (into 6 Ohms) 367W (into 4 Ohms)
Dynamic power output of over 2 K watts.

Mono X Information (300)

·     The most powerful amplifier created by Cyrus

·     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

·        Home automation control via RS232 and 12v Triggers for truly flexible installation options

·        Reference sound quality has been achieved through the last 7 years of product evolution and R&D research

Audio
Performance (Mono X 300)

Input Sensitivity (50W 8Ohm) RCA.............................................................. 380mV

Input Sensitivity (50W 8Ohm) BAL.............................................................. 775mV

Input Sensitivity (225W 8Ohm) RCA...........................................................10mV

Input Sensitivity (225W 8Ohm) BAL ........................................................ 1.6V

Input Impedance (RCA).............................................................................47kOhm

Input Impedance (BAL) .............................................................................. 20kOhm

Output Power
(Continuous) 8Ohm ........................................................
225Wrms

Output Power (Continuous) 4Ohm ..........................................................365Wrms

THD+N @2/3 full power.................... (20Hz - 20kHz 8Ù)...................... <0.05%

(1kHz 8Ohm) .................................. <0.004%
 
 




Slew Rate (input filter bypassed) ...........................................................700v/uS

Frequency Response (-3dB)....................................................... 0.1Hz-300kHz

S/N Ratio (Ref. 225W / 8Ohm).................................................................. 116dBA

Chain Output (buffered) ........................................................(unity gain) 808mV

(ref. 810mV RCA input, 1.6V Balanced input.)

Cyrus has pursued Zero Feedback technology because it brings some very special attractive sonic benefits. 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.  ZF 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. Like our SE CD players, we want to deliver the best performance at source as this is the place where we will improve the sound most.

2.  Another benefit is that our 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 new Mono X models falls below measurable limits. The result is an exceptional musical performance.

We have invested in this new ZF platform because we have found these powerful amplifiers preserve the full drama of the musical event yet retain our trade mark open sonic sound-stage. To our ears this design technology brings an inherently natural performance with an unusually quiet background. Although a real challenge to produce commercially, our Zero Feedback platform allows us to retain our famous “larger than the speakers” sound stage yet drive demanding loudspeaker loads with ease.

Ultimately for Cyrus it’s all about challenging our R&D team to harness technology so we can deliver stunning sound quality and our personal passion to push our performance further up market.