-Cyrus ONE Cast Streaming Amplifier Plus KEF LS50 Speakers

This bundle combines the Cyrus ONE Cast Streaming Amplifier with the KEF LS50 Mini Monitor Speakers, giving you a fantastic system with simple wireless streaming, Bluetooth, AirPlay 2 and voice control, all with rich and pristine sound from a perfectly matched pair of speakers.

This package combines the Cyrus ONE Cast Streaming Amplifier with the KEF LS50 Speakers creating a simple yet powerful hi-fi system.

Cyrus ONE Cast Amplifier

The Cyrus ONE Cast effortlessly streams all your favourite music wirelessly with both Wi-Fi and Bluetooth built in, as well as featuring Apple AirPlay 2. Simply open your music service app, connect to the ONE Cast and play your music. The ONE Cast works almost the same as any smart speaker, but produces true audiophile quality. With no additional app necessary, simply use the service you’re familiar with to easily play music through the Cyrus ONE Cast.

The ONE Cast amplifier features 100W per channel, with hybrid Class D amplification and speaker impedance detection to automatically calibrate to your speakers. Using bleeding-edge technology developed by Cyrus, the ONE Cast is capable of driving any pair of loudspeakers to get the best from your music.

Use your voice to control the ONE Cast streaming amp, with any smart speaker connected on your home Wi-Fi network. Simply ask to change the volume, skip tracks and play and pause the music, with Amazon Alexa, Google Assistant or Apple Siri. Connect the ONE Cast to a multi-room network, to hear your music in every room.

With a high quality 32-bit/192 kHz resolution DAC, connect any digital music source, such as your PC through an asynchronous USB-B port, or a TV with the HDMI supporting ARC connection. Also featuring a built-in MM phono stage for turntables, the ONE Cast acts as the centre of your home entertainment system, creating a one-box solution for all your audio needs. The Cyrus streaming amplifier adds in a Class AB headphone amplifier, perfect for late night listening whilst still keeping all the detail and musical clarity.

KEF LS50 Mini Monitor Speakers

What makes the KEF LS50 Mini Monitor Speakers outstanding is its unique design and components used, which offers the most precise and cleanest studio level performance of any mini monitor. The speakers are designed to offer an extremely high-quality experience, as they are equipped with the latest technology and takes inspiration from their flagship Blade loudspeaker.

  • Stream music wirelessly with Wi-Fi, Bluetooth and AirPlay 2
  • Play music with Spotify, TIDAL, Amazon Music and more, straight through the respective app
  • 100W Hybrid Class D amplification with bleeding-edge technology to handle any loudspeakers
  • Voice control with Amazon Alexa, Google Assistant and Apple Siri
  • Connect to the network for multi-room audio
  • 32-bit DAC for USB, HDMI, optical and coaxial digital inputs
  • Built-in MM phono stage for vinyl playback
  • Class AB headphone amplifier
  • An innovative concept derived from the legendary LS3/5a
  • Employs state-of-the-art technologies from KEF's flagship Blade loudspeaker
  • Uni-Q driver array: HF: 25mm (1in.) vented aluminium dome
  • MF: 130mm (5.25in.) magnesium/aluminium alloy driver
  • Includes 5m of QED 42 Strand Speaker Cable



More Information
Brands Cyrus Audio
Product Specifications


Asynchronous USB input (up to 32bit 192khz and DSD to DSD128),


Optical Toslink,

Coaxial SPDIF Bluetooth

Audio RCA input to built-in MM phono stage for turntables.

Analogue input configurable for AV integration


Over the air firmware update – Latest software downloads and installs automatically

Linear power supply

IR remote control

Lockable front panel controls


Cyrus 4th generation Hybrid Class D amplifier – outputs 2 x 100W (into 6 O at 0.1% THD+N)

SID – Speaker Impedance Detection (automatically calibrates amplifier to your speakers)

Pre outputs – connect to additional power amplifiers

High power, high voltage class AB headphone amplifier


85 x 220 x 390mm



  • Freqency repsonse 
79Hz - 28kHz
  • Dimensions (HxWxD) in mm 
302 x 200 x 278
  • Cross Over Frequency 
  • Recommended Amp Power 
25 - 100 Watts
  • Nominal Impedance 
8 Ohms
  • Weight 
7.2 kg
  • Sensitivity 
  • Frequency range 
47Hz - 45kHz

Product Brochures


Warranty information for Cyrus Audio:
Cyrus Audio
Cyrus Audio products are designed and manufactured to the highest quality standards. However, if something does go wrong with the product we are here to help.

From your date of purchase your Cyrus Standard product is warranted against faulty materials or workmanship for a period of 24 months, plus an extra 12 months when you register your purchase at Cyrus Audio totaling 3 years

Cyrus Signature products are warranted for 24 months with and extra 36 months when you register your purchase at Cyrus Audio totaling 5 years

This guarantee applies to all Cyrus Audio Products including CD players, Digital Streamers, Digital to Analogue Convertors, Hi Fi and AV Equipment Racks, Hi Fi Amplifiers and Receivers, Power Supplies, Stereo & Mono Power Amplifiers and Stereo Pre Amplifiers. Providing you with peace of mind and the assurance of premium Quality. SoundKey is provided with a 12-month warranty and no registration is required to activate it.

  • HiFix is a holding of Hi-Fi Excellence Ltd
  • VAT No. 585 1698 93
  • Company No. 02540830
  • Consumer Credit No. 353419