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Product Details
Elfidelity AXF-100 Ultra USB isolator audio filter for PC

Perfect product for anyone using a PC or HTPC as a source cloud with a converter (DAC) USB.

Component-based and high-end connectivity, it will clean the USB port of the noise generated by the switching power supply while allowing injection if you wish 5V “clean” from an external source (battery, power supply Linear etc. ..).

This product integrates an advanced power management can automatically switch if for example the external power supply were to no longer power the module correctly.


  • Maximum current: 5A
  • Maximum Power: 25W
  • Automatic power switching speed: <5ms
  • Ripple factor: <1Hz
  • Japanese capacitors
  • Shielded Inductors TDK
  • Takamisawa Relais Japanese
  • Dimensions (PCB): 90 x 60 mm
  • Weight: 130 g

Green light (DATA)—–prompt in the built-in power supply state
Red Light (External Power)—–prompt in external power supply state

Yellow light (Build in Power)—–prompt whether USB signal access
For the protection of USB signals:• Native non-bridging USB signal access, starting from the bus and drive to find the most simple level design, to avoid jitters
• Hardware layer in strict accordance with the design specifications differential traces, through industrial level of EMI test
• Built-in power supply directly introduced from the power source, completely isolated USB bus power, avoiding the motherboard, other electrical equipment interference
• Multi-band, progressive times, the ultimate power filter design provides high stability, high-purity current
• Power dynamic compensation technology, large dynamic automatic compensation, providing constant ripple
• Less than 1Hz pure power! Multi-mode power input seamless switching, intelligent protection design
For USB-powered security:• internal and external self-powered identification, automatic switching, self-protection. The external power supply is lower than 4.8 V or removed, automatically and seamlessly switch back to the built-in power supply. Device is not lost, not be damaged.
• Shutdown automatically disconnect the external power supply to ensure USB audio device is completely powered off, prevent no signal load to damage to the equipment, energy-saving external power supply.
Intelligent power optimization designChoose a variety of external power supply, especially designed for optimizing the use of battery power
• Automatic monitoring, when battery loss of pressure and removed automatically switch to the built-in power supply, without having to manually select
• Automatic shut off external power supply, protective equipment, to save battery
• Filter mobile power supply ripple boost circuit
Package: (just as the below picture show)
  • 1PC internal USB Power Filter Board
  • 1PC power adapter
  • 1PC power cord
  • 1PC USB 2.0 cable
  • 1PC USB 3.0 cable





Item Specifics
Model Number:
Maximum Power Per Channel:
Brand Name:
Home Amplifier
Shipping & Payment


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of jonaki (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

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3 Aug 2019

The product is excellent, quality packed, its own branded boxes hi-end level

6 Mar 2019


Super hot! Several others have checked this out in the last few hours

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