The 7 Best USB Filters
This wiki has been updated 7 times since it was first published in January of 2019. Electromagnetic interference is a problem that audiophiles, voice-over artists, studio engineers and musicians sometimes have to deal with. If you're transmitting anything via USB, the electrical lines as well as the various components in the system can have an adverse effect on the audio fidelity, noise floor, and distortion levels. Here are a few great ways to help filter out unwanted artifacts. When users buy our independently chosen editorial picks, we may earn commissions to help fund the Wiki. Skip to the best usb filter on Amazon.
March 29, 2019:
Depending on what your exact situation is, there are handful of different ways to filter a USB signal and eliminate various types of noise. The most straightforward and common among owners of compact DACs are the AudioQuest and the IFI iSilencer. They're small and reasonably priced dongles, and you can use up to 2 or 4 per computer at one time, respectively. For most everyday applications, they can essentially level up a mid-range DAC. If you're running audio from a high-end amplifier, check out the iPurifer, which is a full-featured, 3-way filter that can help to make a home audio setup sound pristine. If you're even more demanding than that, and must have the best, the IFI iGalvanic is probably the way to go. It's really expensive, but if you're bogged down with different signals cutting into your transmission quality, it can really improve how your amplifier sounds, while eliminating a wide range of artifacts as well as ground loop hums. Speaking of ground loops, if that's where your problem lies, the iDefender may be a godsend. It won't fix every ailment that can afflict a USB signal, but it might just do the trick, and with its separately available power supply, you won't even lose USB power functionality to the DAC. If you know that your problem lies in mismatched signal clock speeds, the Wyred 4 Sound Recovery will do a great job of matching them, and in doing this it can bring out exceptional bass and treble response that you otherwise never would have heard. And if you're looking for something simple and cheap that you can throw in your pocket to simply remove the USB power from the equation, the SBooster VBus is a good way to do it.