Cyrus Mono X 300 Power Amplifiers (Pair) - Pre-Owned
- Free Mainland UK Shipping on orders over £100
- Official Hi-Fi Retailer since 1973
- Low stock - 1 item left
We offer free delivery on all orders over £100 to mainland UK. Orders under £100 will be subject to a shipping charge starting at £5, where you may select a more premium option if desired.
Please note that the estimated time of arrival is measured from when we post your order - if a product is not available for immediate dispatch we will let you know as soon as possible.
Delivery is available across mainland UK. If you are located outside mainland UK and would like a shipping quote, please get in touch before placing your order.
We aim to dispatch in-stock items as soon as possible provided that we physically have the stock - but please note that sometimes we have to order from our supplier for certain products.
Tracking details or estimated delivery timescales will be provided once your order has been processed. If there are any delays due to stock availability, we will contact you as soon as possible with the option to wait or receive a full refund. In most cases however, orders are fulfilled within 1-5 working days.
Please note that certain products may be subject to specific distance selling or delivery regulations. If you are unsure about a product or its delivery terms, please do get in touch.
You can cancel your order within 14 days of receiving your goods, in line with UK distance selling regulations. Once you’ve notified us, you have a further 14 days to return the item. Please contact us by email, phone or in writing before sending anything back.
Items must be returned in original condition and packaging, including all accessories, manuals and any promotional items. The cost of return is your responsibility and we strongly recommend insuring the goods, as refunds cannot be issued for damaged or incomplete returns. If items show excessive handling, are missing components, or cannot be resold as new, a reasonable deduction may be made.
Please note that used headphones (for hygiene reasons) and custom or special-order items cannot be returned. If you need assistance arranging a return, we’re always happy to help.
Product Summary
Recently serviced by Cyrus with a 12 month warranty. Includes all boxing and accessories.
The Cyrus Mono X 300 is a high-performance monoblock power amplifier designed to combine substantial power and loudspeaker control with the compact proportions of Cyrus' classic half-width chassis. Supplied here as a pair, one amplifier powers each stereo channel for completely independent left and right channel amplification.
Cyrus' Zero Feedback circuit topology allows the key amplifier stages to operate without a conventional global feedback loop, contributing to excellent resolution, wide-open imaging and an exceptionally clean background. Each Mono X 300 delivers 225 watts continuously into 8 ohms, providing plenty of headroom for demanding loudspeakers.
Balanced XLR and RCA inputs provide flexible connection to a wide range of pre-amplifiers, while buffered chain outputs make bi-amping and more complex systems straightforward. MC-Bus, 12V trigger, RS232 and automatic Music Sense functions provide additional control and integration options.
Key Benefits
- Pair of dedicated monoblock power amplifiers
- 225W continuous output into 8 ohms per amplifier
- Completely separate amplification for left and right channels
- Cyrus Zero Feedback amplifier topology
- Balanced XLR and RCA analogue inputs
- Buffered chain output for bi-amping applications
- 116dBA signal-to-noise ratio
- Wide 0.1Hz - 300kHz frequency response
- High 700V/µs slew rate
- Automatic Music Sense power control
- MC-Bus system integration
- RS232 and 12V trigger control
- Intelligent twin-fan cooling system
- Compact die-cast Cyrus chassis
- Made in England
Technical Specifications
Amplification - Per Amplifier
- Type: Monoblock Power Amplifier
- Output Power: 225W RMS continuous into 8 ohms
- Amplifier Topology: Zero Feedback
- Frequency Response: 0.1Hz - 300kHz (-3dB)
- THD+N: Less than 0.05% at two-thirds full power, 20Hz - 20kHz / 8 ohms
- THD+N: Less than 0.004% at 1kHz / 8 ohms
- Signal-to-Noise Ratio: 116dBA referenced to 225W / 8 ohms
- Slew Rate: 700V/µs
Inputs
- 1 x Balanced XLR Input
- 1 x Unbalanced RCA Input
- Selectable RCA or Balanced Input
- RCA Input Impedance: 47k ohms
- Balanced Input Impedance: 20k ohms
- RCA Sensitivity for 225W / 8 ohms: 890mV
- Balanced Sensitivity for 225W / 8 ohms: 1.78V
Outputs & Control
- Speaker Output with Dual Connections for Bi-Wiring
- Buffered Chain Output
- MC-Bus Input and Output
- RS232 Control
- 12V Trigger Control
- Automatic Music Sense Power Control
Cooling
- Intelligent Twin-Fan Forced-Air Cooling
- Fan Speed Automatically Adjusts According to Operating Temperature
- Fans Switch Off When Cooling Is Not Required
Power
- Standby Consumption: Less than 1W per amplifier
- Power Consumption with No Signal: 23W per amplifier
- Maximum Power Consumption: 750W per amplifier
Dimensions & Weight - Per Amplifier
- Width: 215mm
- Height: 75mm
- Depth: 365mm
- Weight: 6.4kg
- Construction: Die-Cast Chassis
What's in the Box
- 2 x Cyrus Mono X 300 Monoblock Power Amplifiers
- Mains Power Cables
- Associated Cyrus Connection Accessories as Supplied
