usb Reclocker network bridge


Stack Audio is focused on the source. Introduce noise and distortion at the start of the playback process and it disrupts the enjoyment of the music. The LINK II has been built from the ground up to remove unwanted noise.

Please note due to key component supply issues, the LINK is out of stock and will likely be for the foreseeable future 

USB Network bridge/Reclocker

The LINK II is a digital audio bridge that accepts music
files streamed from internet subscription services or music files you already own and links them to your hi-fi system.

The LINK II is optimised for audio playback. Using advanced technologies designed to remove noise from the outset, avoiding the need for excessive filtering which can restrain sound quality. Replacing a noisy PC or laptop with the LINK II to stream your music files reveals a lot of hidden detail.

Super clean power

Stack Audio’s approach is two staged. The first stage is the VOLT – a separate external linear DC power supply. This removes background noise, revealing subtle details often masked by generic switch-mode power supplies. The second stage is an advanced, low noise, power supply stage inside the LINK.

The VOLT uses high quality components throughout to minimise mains noise and provide 18V of pure, smooth, linear DC:
  • UK made precision wound Toroidal transformer
  • Audio grade capacitors and connectors
  • Noise suppression filters on both the input and output signals
  • Precision machined aluminium case
  • Transformer mounted on an isolation plate incorporating AVDC
  • High-quality star-quad geometry connecting cable provides protection against EMI and mains borne interference
The LINK features a purpose designed, low noise, multi-stage power circuit:
  • Three independent switching regulators are synchronized to the audio clock. This ensures that the fluctuations of the switching circuit are in time with that of the audio clock reducing fluctuations and noise interference
  • Nine organic low resistance capacitors help filter and purify the power
  • A triple linear regulated circuit purifies remaining noise
  • The USB audio output and clock circuit has its own independent power rail

Ultra low-noise clock

The clock inside a streamer is essentially where the music signal begins so accuracy is key. Instead of using a standard clock, the LINK II uses a discrete clock circuit designed with low phase noise within the audio band. 

In the world of digital audio, multiple clocks running at different speeds cause noise and jitter problems. We typically hear this as an edgy or brittle quality to the sound. To avoid this, the LINK II uses an ultra-low phase noise oscillator powered by an exceptionally clean supply. The ethernet, USB and the PSU are synchronised to the master clock, resulting in one coherent and extremely accurate device. This ensures that the fluctuations of the switching circuit are in time with that of the audio clock, reducing noise.

Solid aluminium case

The LINK II is a pure digital system housed in a solid CNC machined aluminium case enclosed with EMI absorbing material. This ensures noise does not escape and enter the analogue domain nor does noise enter and affect the clock circuit.


The LINK II is designed to be as easy to use as possible. You do not need to download new software or learn a new control app to make it work. You can continue to use your favourite and familiar software to control and send music to the LINK II.  The LINK II works as an endpoint for the following protocols/programs

  • Roon (Roon Ready certified) 60 day trial included 
  • Audirvana
  • Squeezelite
  • Airplay® (Shairport-Sync )
  • Spotify® (Librespot)
  • HQPlayer 

Can’t decide on your control software? Click here to find out more.


*For further information please click here 


Audio Feature Summary
  • Power circuitry is synchronized to the USB audio clock
  • Ethernet input is synchronized to the USB audio clock
  • Multi-stage ultra-low noise linear regulated power circuit
  • USB audio optimized output provides jitter free audio layback
  • The advanced clock circuitry re-clocks any USB input
Mechanical Feature Sumary
  • Machined from a solid billet of aluminum
  • Incorporates EMI absorbing material to remove internal EMI
  • The mass of the case dissipates air-borne vibration
  • Incorporates AVDC vibration trap
Communication Protocols
  • Ethernet
  • USB
  • Wi-Fi
  • Bluetooth
  • 1 x dedicated USB audio output
  • HDMI out (not i2s, or used)
Streaming Protocols
  • Roon
  • Audirvana
  • Squeezelite
  • Airplay® (Shairport-Sync)
  • Spotify® (Librespot)
  • HQPlayer (coming soon)
Supported Audio File Formats
  • Lossless: DSF (DSD), DIFF (DSD), DoP (DSD) DoP and Native DSD up to DSD 256
  • PCM Lossless: FLAC, Apple Lossless (ALAC), WAV, AIFF Compressed (lossy) Audio: MP3, AAC (in M4A container) MQA (only if DAC supports hardware unfolding) PCM up to 384 kHz /32 bits
  • Finish : Available in anodised silver or black
  • Dimensions: 174mm(W), 140mm (D), 25mm (H), 1kg (without external power supply)
  • 2 x USB inputs (Future use)
  • 1 x USB B detox input
  • Ethernet input
  • 18v 1amp- 1.5amp DC input

No compromise. See what goes into making a LINK II

Press Reviews

“Despite being significantly more affordable than most on that list, I’d place the Stack Audio Link II close to the very top of the heap. It unleashes the clarity and transparency I’ve come to expect from my reference DAC, without the somewhat thin, wispy feel I hear from the Dell. It offers subjectively stunning good […]

“The first thing you notice about this is it’s fast. Transients happen quickly here, a bit like a really well set-up CD player compared with first-generation streaming. Play something with a lot of fast beats (‘Fuzzy Monkey’ by Morton Granau, streamed from Tidal) and it arrives with almost supernatural speed.” Alan Sircom, HiFi+

“I am very impressed by the Stack Link II, it offers a standard of sound quality that you expect of a streaming bridge at twice the price alongside the build quality of something more expensive. How many streamers have machined from solid cases at any price? I used Roon for most of my listening and […]

Customer Reviews

“My experience since upgrading all my equipment and purchasing of The Link has been excellent. I am delighted with the sound quality I’m achieving and convinced The Link is playing a major part in the improvement.” I first became interested in considering using my computer as a playback/streaming device a number of years ago. I […]

“The Link never gets in the way of the music, it provides purity and insight and serves up everything a good DAC needs to sound even better than you thought it could.” I was looking for a streaming upgrade to my Bluesound Node 2i. I didn’t need a DAC as I was happy with the […]

“The Link II is a fantastic streamer that does not get in the way of the music, instead adding to a greater sense of satisfaction and enjoyment to my music listening, all the while remaining a stable and effective Roon endpoint. I wanted to write to give my impressions of the Stack Audio Link II streamer.  […]

Get in Touch

Europe: +44 (0)1626 24 9005

USA +1 (866) 232 7610

8am-6pm BST

    I want to receive information relating to Stack Audio news and special promotions

    Select your currency
    GBPPound sterling
    EUR Euro