Cyrus ONE HD

The ONE HD is a compact, yet staggeringly powerful amplifier capable designed to connect with almost everything that produces sound. With a choice of digital or analogue inputs, TVs, CD players, tuners, even ‘smart speakers’ can be connected and amplified.


ONE HD High resolution Digital

ONE HD also features a high-resolution USB input, which you can connect to via your PC or laptop to deliver amazing audio, right up to 32bit, 192kHz. Other features include a built-in phono stage, built-in headphone amp and an AV mode, allowing ONE HD to work in partnership with your home cinema to deliver breathtaking audio.

Product Features

Bluetooth Enabled – aptX®HD:

aptX® HD compatible Bluetooth enables you to stream better than CD quality music from your phone/tablet or computer via a wireless Bluetooth connection, providing maximum flexibility without the need for a home network or any complicated set up. This allows everyone in the family to enjoy their music from their portable devices quickly and easily.

High-power Amplifier:

2 x 100W gives class-leading power output that will drive most loudspeakers regardless of their size. All that power enables Cyrus ONE HD to present your music with a huge dynamic range, giving 3D detail and bags of energy without the need to buy big, bulky, inefficient amplifier boxes.

MM Phono Stage:

Cyrus ONE HD features a built-in phono stage that is compatible with all Moving Magnet cartridges and requires no adjustment or extra set up, enabling you to play all your favourite vinyl from most turntables.

Digital and analogue inputs:

Asynchronous USB, optical and SPDIF inputs enable you to connect your PC, TV, Games Console, CD player, indeed virtually any source, directly to the Cyrus ONE HD. Four analogue inputs include RCA terminals for a turntable and an AV input that can be set to fixed gain in order to integrate with a separate AV amplifier.

Class AB Headphone Amplifier:

Uniquely, when headphones are connected, the large toroidal transformer is switched to power just the headphone section. These huge reserves of power result in a high power, high voltage class AB headphone amplifier that will drive almost all headphones with ease. The resulting musical performance is on a par with most standalone headphone amplifiers

Speaker Impedance Adjustment:

SID – Speaker Impedance Detection automatically matches the amplifier’s output response to the electrical load of the loudspeakers. This means that matching Cyrus ONE HD to any brand of loudspeaker has suddenly been made so much easier.


  • Asynchronous USB 2.0 input – up to 32/192 signals, and up to DSD128. Support up to Windows 10
  • Optical Toslink digital input – up to 24/192 signals
  • Coaxial SPDIF digital input – up to 24/192 signals
  • RCA input to built-in MM phono stage
  • aptX® HD compatible Bluetooth audio
  • 3 x line level inputs – including AV integration option
  • Pre outputs – connect to additional power amplifiers
  • High power, high voltage class AB headphone amplifier
  • Bi-wire compatible speaker binding posts
  • User upgradeable firmware
  • Bluetooth control app
  • Cyrus 4th generation Hybrid Class D amplifier
  • Outputs 2 x 100W (into 8 Ω at 0.1% THD+N)
  • SID – Speaker Impedance Detection
  • Linear power supply
  • Signal to Noise Ratio – 128dBA
  • 1300V/us Slew Rate
  • 700mA max output current (per channel)
  • 2 x 1W max output power
  • Recommended headphone impedance 16 – 1200 Ohm
  • Dimensions (H X W X D) – 85 x 220 x 390mm
  • Weight – 5.6kg

Manuals & Guides


“It’s clean, open and detailed, taking delight in the texture and timbre alike as we begin our testing with Radiohead’s OK Computer. That solidity is there, too, offering body to Thom Yorke’s vocal and real presence to its accompaniment.” – What Hifi

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“When you do add in, bi-wiring capabilities, MM phono stage, a really decent headphone amp, plentiful digital and analogue hook-ups all wrapped up in a tidy, compact package, what’s not to love?” – Stereonet

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“If you’re in the market for an integrated amplifier
with the right smarts and great sound, HD is the way to go” – Hi-Fi Choice

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“The Cyrus ONE HD Integrated Amplifier is convincing across the board. It is an extremely flexible stereo integrated amplifier, compatible with both vinyl and a wide variety of digital sources. It even integrates smartphones and tablets in a simple way and, thanks to an effective circuit concept, has at its disposal more than enough power even in a compact footprint. The fact that you also get the finest sound and an impeccable lifestyle solution in the very best sense, also speaks for the Cyrus ONE HD, which therefore receives a clear recommendation.”

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“With the One HD, Cyrus offers an extremely powerful and great sounding amplifier which comes with numerous features and is easy to use. Thanks to Bluetooth music streaming, high-resolution DAC, high-quality phono stage and headphone amplifier, the new One HD is recommended for all sound enthusiasts who want to enjoy analogue and digital music sources at the highest level.”

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“Cyrus ONE HD is a multifunctional HiFi system with the integrated DAC, Bluetooth aptX-HD and the Phono MM module. It delivers fine, clear sound which at the same time is full of emotion. In the bass department it is extremely tight, with no problem reproducing musical performances on bigger speakers.”

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“Our verdict on the resurrected legend: The Cyrus One is back. More up-to-date and more lavishly equipped than ever and as powerful as ever. And that’s why – again – it’s worth a big recommendation.”

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“Cyrus One HD proves to be a real music machine. Thanks to extensive connectivity including Bluetooth HD, the slim amplifier can easily bring its sonic capabilities to a variety of usage scenarios required today. Since it also optimally adapts to the loudspeaker thanks to the innovative SID circuit, it always makes the best of every situation. The One HD is truly one for all and everything.”

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“The Cyrus One HD is the digitally upgraded and updated version of the Cyrus One: The HD version now offers Bluetooth streaming with the powerful aptX HD codec, two S/PDIF inputs and a USB-B port – plus an audiophile DAC which converts the HiRes data cleanly: PCM signals up to 192 kHz / 32 bit, via USB even DSD files up to DSD128. In the analogue domain HD is equipped with three line inputs and a phono MM input. The Cyrus One HD makes both traditional and modern music listeners happy. In terms of sound, this amplifier meets the highest audiophile demands, it works dynamically, clearly and powerfully. This small amplifier proves to be a big powerhouse that drives even the most demanding speakers and headphones. So this big brother of the Cyrus One remains true to the spirit of the legendary original: it delivers very good performance at a very good price.”

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“”Simply ONEderful” The newly launched stereo integrated amplifier Cyrus ONE absolutely deserves the title HD. Digital inputs and a high-resolution Bluetooth codec have allowed the amplifier to be improved in exactly those areas that we still had to criticise in its predecessor. Furthermore, the Cyrus ONE HD adjusts itself, thanks to Cyrus Speaker Impedance Detection (SID), to any speaker.”

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“”Another ONE” – Modern, attractive integrated amplifier with high performance, musical sound characteristics and well equipped. A real “must have” product!”

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“CYRUS ONE HD amplifier: refinement and musical responsiveness.

Very complete and “connected”, the Cyrus One HD has an aptX-HD Bluetooth receiver as well as a DAC with optical and USB type B input. It is equipped with a Speaker Impedance Detection (SID) feature to get the most out of the speakers. The eleven separate power supplies, dedicated to each function and the toroidal transformer, precede the amplification which is a 4th generation Class D hybrid. Different from the Cyrus models previously tested, the One HD relies more on refinement and softness, rather than on frankness, the English brand’s watchword. The result is quite pleasing, as it never detracts from the experience.”

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“That’s the ticket to really good stereo hi-fi. If you want versatility, you have a lot of potential with the Cyrus One HD and the corresponding speakers. You will be able to keep and use the One HD for a long time.”

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“The Cyrus One HD confidently refutes the stubborn prejudice that switching amplifiers sound overly analytical and stringy. Quite the opposite.” “As a champion of value for money, it rightly earns the title: The Special One”

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“The Cyrus ONE HD is basically designed for those who are looking for outstandingly dynamic audiophile sound and do not want to spend money on additional devices. The built-in DAC and phono stage allow for high-quality listening, while using the Bluetooth connectivity you can listen to background music in any situation, when meeting friends or at parties. Because the Cyrus ONE HD has a lot of power, even in the case of low-sensitivity speakers, it can be recommended as part of hi-fi setups also in larger rooms.”

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Designed & Engineered in the United Kingdom

Cyrus Audio Ltd, Registered office: Ermine Business Park, Huntingdon, Cambridgeshire, England, PE29 6XY Company Registration Number: 05158466 - V.A.T Registration Number: 844 4689 89