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Cyrus Soundkey Portable DAC and Headphone Amp (Black)

The sound of your smartphone played through headphones is not nearly as good as you may think. Smartphone manufacturers have to consider cost and the compromise leads to average DAC and Amp components rendering just the bare minimum. The Cyrus soundKey will astound you with supreme musicality and reveal what you have been missing from your music.

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R 2,400.00

Out of stock

Unlock The Best In Your Music

Cyrus soundKey is an award-winning revolution in mobile music. Developments in Hi-Fi streaming from services like TIDAL, Spotify and Apple Music offer fantastic quality to subscribers, but phones lack the necessary hardware to get the best from this data. The Cyrus soundKey unlocks that data, using years of expertise in high-resolution DAC and amplifier design. Cyrus quality audio is now available to everyone.

Top Features:

  • Improved clarity, more realistic sound
  • Works with Windows Vista+, Android 5+ and iOS9+ * (all require OTG connection)
  • 3.5 mm Jack for headphones connection
  • Robust aluminium casing
  • Extremely low current, conserving your phone’s battery life
  • Compatible with a wide range of audio format, including MP3, AAC, and FLAC
  • Can handle High-Resolution audio files up to 24bit/96kHz

*Requires Apple Camera Kit for connection to iOS devices

Cyrus Soundkey Portable DAC and Headphone Amp
Cyrus Soundkey Portable DAC and Headphone Amp

Why Is My Phone Audio Not Good Enough?

Do you think the sound is ok when you plug your expensive headphones into your phone? Wait until you hear this!
To explain a bit more scientifically, music is stored on your phone in various types of digital files. The DAC (Digital-to-Analogue Converter) in most phones, laptops and tablets is designed to hit a cost – that means it’s never going to deliver the kind of audio quality that your music files or streaming services are actually capable of delivering.

The Cyrus soundKey unlocks your audio, by accessing the raw digital files on your device and processes them using our special hi-fi DAC and amplifier. The analogue music output from soundKey delivers much more detail, more impact, greater precision and a good dollop of WOW.

Made for Music on the Go

Super small and light-weight

One of the main things setting the soundKey apart from rivals is its extremely compact size and design. Since listeners using their phone as a music source are likely to be on the move, being small and lightweight is essential. It weighs only 18 g. From a design perspective, smooth rounded edges enable it to feel more like an integral part of the cable without catching or snagging on anything.

Low on power consumption

soundKey is an extremely low current device that deliberately does not use a separate battery. This keeps it small and light and means you don’t have another thing to charge. Powering it relies on your phone battery however while other DACs typically drain 100 mA, the soundKey has been designed to draw only 50 mA efficiently conserving battery life.

Top-Quality Electronics For Awesome Musicality

Cyrus Audio has over 30 years of experience in building award-winning audio products and components. This has given them a leading edge in the design and manufacture of revolutionary products like the Cyrus soundKey. Using carefully selected electronic components of superior quality and weaving them together in a clever circuit design affords the soundKey with 24 bit / 96 kHz decoding capability with supreme musicality all while optimising power usage.

The key to this is in the power supply. Cyrus understands amplifiers do not actually amplify, but instead make larger copies of the original source signal. Therefore, the quality of power used to make the copy is critical to the ultimate quality.

Cyrus Soundkey Portable DAC and Headphone Amp Circuit
Cyrus Soundkey Portable DAC and Headphone Amp

Unbeatable Sound on the Go

Plug the Cyrus soundKey into your phone, tablet or laptop for unbeatable sound on the go. The high-quality components deliver music with a greater sense of space so you hear individual instruments, voices and melodies more clearly.

Detail is greater making subtle nuances in vocal intonation more apparent. There is a better grip on the lower frequencies allowing bass notes to sound more tuneful driving their own rhythm without being just ‘heavy and loud’. Overall, the performance is more emotionally engaging and enjoyable.


The soundKey comes with a Micro-B USB to Micro-B USB cable for use with many Android phones, along with a standard USB Type-A to Micro-B USB cable. You can use that one with a computer, or plug it into an Apple Lightning-to-USB Camera Adapter and plug the adapter into the Apple device.

Digital-to-Analogue Conversion

24 bit at 96 kHz

Operating System Compatibility

Works with Windows Vista+, Android 5+ and iOS9+ (all require OTG connection)

File Format Compatibility

Compatible with a wide range of audio format, including MP3, AAC, and FLAC


USB Micro-B Input
3.5 mm Headphone Jack Output


5.4 x 2.3 x 0.8 cm


18 g