AUDIOPHONICS KIT USB Isolator + Regulated Linear Power Supply

Audiophonics KIT Isolateur USB + Alimentation
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Audiophonics USB isolator kit + regulated linear power supply

A montage help is available on the forumto this address.

"Rediscover the pleasure of silence with this USB isolator to mount yourself"

What Is an Isolator and Why Do I Need It?

As its name implies, an isolator is used to electrically isolate data and / or power lines from a USB connector.

Thethe aim being to remove any electrical connection between the input and the output in order to avoid as much as possible the electrical and electrostatic disturbances of interfering with the audio data.

The ALIMEN(available from a usb connector is very noisy) and filtered drastically, it is not surprising to find the remains of audible parasites in the final rendering. And it's even worse with laptops!

Assembled USB Isolator Module

Another problem regulated by this isolator is the appearance of mass loops when connecting modules by usb. You are not sans know the impact these loops have on audiophile material ... The fewer the better, the better.

It also protects your montages / equipments from surges, electrostatic discharges and other rises of powers likely to happen during malfunction of the computer (or in stormy weather ...).

In addition to the playful aspect of the assembly to be done, this isolator will bring you discretion and serenity in your listening thanks to the very low noise regulator used for the usb power supply. You will thus be able to benefit fully from your converters and other self-powered assemblies (amps headphones, preamplifiers, ...).

Itplus a regulated and filtered power output.

Measurements of residual ripple and spectral analysis of the usb power supply: on the left directly at the output of the computer, on the right the output of the USB Isolator


This module is intended to be placed between the computer and the self-powered device to be isolated.


  • Preserves the clarity of listening andbrings a black backgroundeven at large volume
  • Selected audiophile components: Vishay CMF55 Resistors, Panasonic FC Capacitors, Nichicon ES Muse, ...
  • Using a controller Ultra Low-noise: TPS79650
  • Digital isolation by ADuM4160 developed by Analog Device using technology iCoupler®
  • External power supply output available (9 or 12V selectable by jumper) regulated and filtered up to 300mA (or more depending on the device connected in usb)
  • Increases dynamicsof certain devices, in particular by the possibility of a current of 1A, where a computer is limited to 500mA.
  • Galvanic insulation up to 5kV
  • Card dimensions: 138 x 51,5 x 1,65mm
  • Weight: 60g
  • Compatible with USB2.0 standards but works in transfer speedUSB 1.1 Full-speed(12Mbps) (On some DAC the bitrate may be limited)

Audiophonics Kit Isolateur USB + Alimentation linéaire régulée

Product delivered

WARNING !It is possible to supply this isolator either by transformer or by AC adapter. The power is defined by the use that you want to have of them (greedy devices, feed of other assembly, ...).
To take advantage of the available regulated output, you will have to choose a 12V 15VA minimum transformer (30VA will be the best to take full advantage of the proposed features) or a minimum 15V AC adapter.
If you want to use only the insulation function of the assembly, by transformer it will then be necessary to choose a model 9V 15VA.
If you choose to power it with an AC adapter, you should opt for a 9V model, the minimum current being a function of the connected equipment.

The AC adapter must be of type positive centerand the internal diameter of the DC connector of 2,1mm.
When you plug a power jack into the intended socket, this will disconnect the transformer from the rest of the circuit./ P>


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Bon produit.
Quelques "difficultés" de mise en œuvre puisque je n'avais pas de notice détaillée, chose arrivé sur le forum ensuite en plus des photos de montage.
A savoir, les prises alimentations sont à souder obligatoirement, sinon ça ne fonctionne pas (masse coupé visiblement).

Sur sa fonction principale, pas de soucis, bien que je n'ai pas trouvé de différence audible avec mes interfaces USB / SPDIF (auto-alimentées).
Le coté pratique, c'est que l'on ne tire pas sur l'alimentation du PC (surtout avec un netbook).

J'ai par contre entendu une nette amélioration sur un tout autre produit, à savoir un enregistreur compact ZOOM R8.
Livré d'origine avec une alimentation à découpage USB (secteur / 5V USB) qui était fort bruyante et parfaitement pas isolée du secteur, du coup, avec une guitare de branchée dessus, c'était la foire aux parasites!
J'ai testé cet isolateur dessus, c'est le silence radio!
Objectivement, une alimentation 5V régulées pourrait tout aussi bien faire l'affaire, le coté USB en moins.

J'en conclu que ce produit peut tout à fait être adapté pour un convertisseur USB numérique / analogique utilisant le 5V pour les composants de type AOP, pour les interfaces numériques pures (USB / SPDIF) je n'y ai pas trouvé d'intérêt.
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