Cyrus Mono x Signature 300 | Mono | Front | Crushed Black | Holburn Online
Cyrus Mono x Signature 300 | Mono | Front | Crushed Black | Holburn Online
Cyrus Mono x Signature 300 | Mono | Rear | Crushed Black | Holburn Online
Cyrus Mono x Signature 300 | Mono | Front Detail | Crushed Black | Holburn Online
Cyrus Mono x Signature 300 | Mono | Front | Quartz Silver | Holburn Online
Cyrus Mono x Signature 300 | Feet Detail | Front | Phantom Black | Holburn Online

Cyrus Mono X 300 Signature Power Amplifier

Regular price£3,195.00 GBP.
Tax included. Shipping calculated at checkout.

  • UK Wide Shipping Available
  • Long established Official Retailer
  • Normally in stock, ready to ship
  • Inventory on the way

Finance options are available on purchases of £1500 and more. Options include 0% finance and Buy Now, Pay Later.

You can apply for finance online by selecting the option in Cart, or in store with us at any of our stores.

Cyrus Mono X 300 Signature Power Amplifier 

Zero Feedback Topology: Cyrus’s latest generation Zero Feedback Power amplifier brings inherently natural and high-resolution musical reproduction. By removing the traditional amplifier ‘global feedback’ loop, sonic improvements are made and Cyrus signature sound quality is produced. 

Power: The high current design of the Cyrus Mono X 300 Signature effortlessly drives even the toughest loudspeaker loads. A 200 VA toroidal transformer can provide a huge 319 Watts into 6 ohms which not only produces powerful sound but remains stable throughout.

Connectivity: Balanced or unbalanced connectivity offers all the connectivity
requirements to match up with Cyrus preamplifiers. High-quality bi-wire terminals are provided to allow ideal connectivity to high-performance loudspeakers.

Automation: 12v trigger and RS232 control are provided as standard along with an intelligent signal sense power mode which allows the Mono X 300 Signature to be installed in a variety of setups.

Advanced Thermal Management: Having so much power inside our die-cast aluminium chassis is not a problem thanks to a twin fan design which has a proprietary signal sensing circuit that run the fans in line with the music level; meaning they will never intrude even on the quietest passages of music.


Available as a mono or duo package.


Monobloc power amplifier
Zero feedback technology
XLR + RCA inputs
12V trigger
Signal sense
1 x 319W into 6 Ω
Dimensions (H x W x D) – 73 x 215 x 360 mm
Weight – 6.4kg

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We ship our products around the UK, ensuring that everyone can have access to the most exciting products whether you want to upgrade your audio systerm or build a cinema room.

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A truly excellent service both from the initial contact via the website chat to a personalised telephone call to confirm the chosen product and delivery options. Great and many thanks.


These guys were so helpful! They had a fairly rare item in stock, packaged it up and got it to me in 2 days... very friendly and professional service, would recommend to anyone.


Great shop for vinyl and all things hifi and Audio visual. Staff are friendly and knowledgeable and won’t try and sell you what you don’t need . Recommended!


help line with somebody who was human and helpful when I got stuck setting the amp up. 


I know it's habitual to shop with the big names like Currys. But you won't find anywhere near this level of service from them, and I'll be sure to keep Holburn in mind for the future. Can't recommend them enough!


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