Stack Audio Link II USB Network bridge/Reclocker

Finance this item from as little as per Month

Click For Options

The LINK II is a digital audio bridge that accepts music files “streamed” from internet subscription services (like Spotify, Tidal, Qobuz etc.) or music files that you might already own and links them to your HiFi system.

Stack Audio has always been focused on source devices, after all, it’s where everything starts. Introduce noise and distortion at the start of the playback process, it damages and disrupts our enjoyment of the music, as a result, the LINK II has been built from the ground up to remove unwanted noise. Your favourite music sounds more realistic and immersive. The LINK II’s new clock has 50% lower phase noise in contrast with its predecessor, Stack Audio’s LINK.

S Power
Power supplies are essential to energise circuits and make electronics work. Everything starts with power. However, if they are not implemented well, they can add noise and distortion. The LINK II’s advanced digital processors are powered by uniquely designed, exceedingly low noise, multi-stage power circuitry.

  • 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.

S Clock

The clock system is the heartbeat of any digital system, it manages and creates a mathematical reference for the various protocols to work from, be that Ethernet or USB.

In our world, that of digital audio file playback, multiple clocks, all running at different speeds tend to cause noise and jitter problems. We typically hear this as it gives an edgy or brittle quality to the sound.

The accuracy and reliability of the clock system, therefore, has a direct influence on the performance of the product.

The LINK II uses an ultra-low phase noise oscillator. Here at Stack Audio we went to great lengths to extract the absolute performance from this clock. It starts by powering it with an exceptionally clean supply. In addition to this, we synchronised the ethernet, USB and the PSU to the audio 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 fluctuations and noise. The three independent switching regulators are synchronized to the audio clock, thus when the PSU switches frequencies it is in time with the master audio clock removing clashes and interference.

Solid Aluminium Case

The LINK II is a pure digital system housed in a thick 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 Software

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. Afterall companies like Roon, Audirvana, Spotify, Tidal etc. have already invested considerable resources into delivering world class software, which most of us already know how to use.


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 Summary
  • 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, UPnP/DLNA, Airplay® (Shairport-Sync), Spotify® (Librespot)
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
Book a Demo - Stack Audio Link II USB Network bridge/Reclocker

Nintronics offers generous trade in prices to help make your next upgrade as seamless as possible, while greatly reducing the overall price of your purchase. Depending upon the items involved, Nintronics will be happy to send out one of our nationwide installation engineers to collect your traded in items and unbox, setup and calibrate your new equipment.

Trade In - Stack Audio Link II USB Network bridge/Reclocker
Write Your Own Review
You're reviewing:Stack Audio Link II USB Network bridge/Reclocker
Your Rating

Products from the same brand

We can't find products matching the selection.

We offer FREE delivery to the mainland UK (excluding Channel Islands, Isle of Man, Isle of White, Isles of Scilly, and some of the remote Scottish Isles).

For other areas please contact us for a quote. Select items can be delivered internationally by prior agreement. Again please contact us for a quote. We will always do our best to help.

Our aim is to dispatch goods within 2 working days of an order being placed. Please allow 5 working days from the time of your order to receipt of item. If an order is expected to take longer than this our order fulfillment department will contact you to inform you of this.

Where multiple items are ordered, we will dispatch them all in one package. If you have ordered any special or customized items, or items otherwise not immediately available, we will dispatch the order when all items are available. If you have any concerns regarding this, please contact us and we will do are very best to help you.